acs-prf grants approved; amounts raised

2
ACS News ACS-PRF grants approved; amounts raised Acting on recommendations from the February meeting of the PRF Advi- sory Board, the ACS Board of Direc- tors approved 89 new and continued ACS-PRF grants-in-aid. The board's action, taken at the 183rd ACS Na- tional Meeting in Las Vegas, adds $1,817,052 to PRF commitments for 1982. The new grants were selected from a total of 249 proposals. The board of directors also ap- proved a $1.25 million increase in this year's Petroleum Research Fund grant budget to a new total of $8.45 million. Further, the maximum dollar value of PRF research grants was in- creased beginning in 1983. Type G (starter) grants will rise from $10,000 to $15,000 for two years, Type B grants (for undergraduate depart- ACS-PRF Grants for Fundamental Research in the Petroleum Field (Type AC) Robert A. Moss, Rutgers U. Functional Vesicles as Reagents in Organic Chemistry. $45,000 K. C. Nicolaou, U of Pennsylvania. Total Synthesis of Endiandric Acid and Related Natural Products. $45,000 N. John Cooper, Harvard U. Mechanism and Stereo- chemistry of the Insertion of a Methylidene Ligand into a Transition Metal-Alkyl Linkage. $30,000 Joseph C. Salamone, U of Lowell. Ampholytic lono- mers from Ion-Pair Comonomers. $45,000 Philip H. Heckel, U of Iowa. Lithostratigraphy, Cor- relation, and Depositional-Diagenetic History of Middle and Upper Pennsylvanian Rocks, Midconti- nent North America. $30,000 James A. Austin Jr., U of Texas, Austin, Institute for Geophysics. Structural and Seismic Stratigraphic Evolution of the Southeastern Gulf of Mexico/Straits of Florida/Western Bahamas. $29,972 R. David Dallmeyer, U of Georgia. 40 Ar/ 39 Ar Incre- mental-Release Dating of Selected Igneous and Metamorphic Lithologies Beneath the Southeastern Coastal Plain. $44,000 James R. Maxwell, U of Bristol, England. Origin and Significance of Sedimentary 4-Methyl Steroid Hy- drocarbons. $22,489 Robert E. Garrison, U of California, Santa Cruz. De- positional Environments, Phosphatization, and Dolomitization in the Lower Part of the Monterey Formation, Central California Coast Ranges. $30,000 W. Lester S. Andrews, U of Virginia. Matrix Synthesis and Infrared Spectroscopy of Monomeric Lithio- carbon Species. $30,000 Derek J. Hodgson, U of North Carolina, Chapel Hill. Exchange Interactions in Magnetically Condensed Complexes. $45,000 John A. Morrison, U of Illinois, Chicago Circle. Electron Deficient, Uniquely Reactive Cluster Com- pounds—the Polyhedral Boron Halides. $30,000 William E. Geiger Jr., U of Vermont. Reduction and Oxidation Pathways in Small Metal Cluster Com- pounds and Dimetallacycles. $30,000 Thomas N. Sorrell, U of North Carolina, Chapel Hill. Binuclear Complexes of Copper. $30,000 ments) from $13,000 to $15,000 for two years, and Type AC grants will move from $15,000 to $17,500 per year for up to three years, or a new maximum grant of $52,500. Revised application forms for all types of ACS-PRF grants will be available shortly. Investigators may submit proposals at any time during the remainder of the year for funding in 1983. The "26th Annual Report on Research Under Sponsorship of the Petroleum Research Fund" has been published. Interested parties who wish to receive a complimentary copy of the report, or any of the new ap- plication forms, should contact Pe- troleum Research Fund, ACS, 1155—16th St., N.W., Washington, D.C. 20036, telephone (202) 872-4481. Kenneth J. Klabunde, Kansas State U. Metal Vapor Chemistry. Matrix Isolation Spectroscopy Studies of Alkanes and Alkyl Halides. $45,000 Robert D. Bereman, North Carolina State U. Reso- nance-Induced Properties in New Dithiolene, Di- thiolate, Dithio- and Monothiocarbamate Com- plexes. $30,000 J. Christopher Dalton, Bowling Green State U. Pho- tochemistry of Acylsilanes and Reactions of Siloxycarbenes. $30,000 Martin Newcomb, Texas A&M U. Mechanistic Probes for Electron-Transfer Processes in Reactions of Hindered Lithium Dialkylamide Bases. $30,000 Matthew S. Platz, Ohio State U. m-Xylylene and Re- lated Compounds. $30,000 Donald C. DKtmer, Syracuse U. Significant Structures Derived from Thietes. $45,000 Richard P. Johnson, Iowa State U. Orbital Interaction by Design: Theory, Synthesis, and Chemical Prop- erties of Columnar Conjugated Molecules. $45,000 Carl R. Johnson, Wayne State U. Remote Substituent Effects on the Stereochemistry of Additions to Cy- clohexanones and Methylenecyclohexanes. $30,000 Harry G. Brrttaln, Seton Hall U. Luminescence Studies of Europium Oxide Catalysts. $42,000 Sherril D. Christian, U of Oklahoma. Vapor Pressure Studies of Dilute Aqueous Solutions of Alcohols. $45,000 Donald W. Setser, Kansas State U. Flowing Afterglow Studies of Electronically Excited-State Chemistry. $45,000 Jean H. Futrell, U of Utah. Reaction Dynamics Study of Collision-Induced Dissociation Reactions of Or- ganic Ions. $45,000 Sow-Hsin Chen, Massachusetts Institute of Technol- ogy. Study of Intra- and Intermicellar Structures by Small Angle Neutron Scattering. $45,000 Katharine L. Clarke Hunt, Michigan State U. Ab Initio and Approximate Calculations of Collision-Induced Dipoles and Polarizabilities. $30,000 David M. Hanson, State U of New York, Stony Brook. Charge Distributions in the Excited Vibronic States of Molecules. $45,000 Robert L. Powell, Washington U. Acoustic Streaming in Non-Newtonian Fluids. $45,000 William C. Conner Jr., U of Massachusetts. Rate of Hydrogen Surface Mobility and the Effect on Hy- drogenation and Dehydrogenation. $45,000 Donald R. Paul, Joel W. Barlow, U of Texas, Austin. Thermodynamics of Polymer Blends. $45,000 Liang-Shih Fan, Ohio State U. Fundamental Charac- teristics of the Gas-Liquid-Solid Fluidized-Bed Re- actor for Hydrocarbon Processings. $44,887 ACS-PRF grants for fundamental research in the petroleum field (Type B) Stanley H. Pine, California State U, Los Angeles. Ti- tanium-Aluminum Carbenoid Complex. $13,000 Kenneth R. Fountain, Northeast Missouri State U. Friedel-Crafts Reactions with Heterocummulene Complexes. $13,000 Suzanne W. Slayden, George Mason U. Electro- phile-lnduced Organoborate Rearrangements. $13,000 Alfons L. Baumstark, Georgia State U. Thermal De- composition of 1,2-Dioxetanes. $13,000 Claude H. Yoder, Franklin and Marshall C. Reactions of Ambident Substrates Containing Elements of Group IV. $13,000 Harold W. Heine, Bucknell U. Chemistry of Nitrones and Quinone Imides. $13,000 Samuel P. McManus, U of Alabama, Huntsville. Nucleophilic Displacement Reactions. $13,000 Thomas E. Goodwin, Hendrix C. Chiral Induction via rt-Chloronitrones. $13,000 Stephen K. Taylor, Olivet Nazarene C. Epoxide Friedel-Crafts Reactions. $13,000 Harold R. Pestana, Colby C. Carbonate Production by Sargassum Epibionts. $6894 Rodney F. Boyer, Hope C. Chelation in Iron Metabo- lism. $13,000 Wolfgang Christian, Earlham C. Energy Transfer in Gases. $13,000 Donald G. Kubler, Furman U. Does the Energy of Ac- tivation Change with Temperature for Sucrose Hy- drolysis? $13,000 James E. Conkin, U of Louisville. Devonian Ura- nium-Oil Shales. $13,000 Gerald F. Kokoszka, State U of New York, Pittsburgh. Multifrequency EPR Studies. $13,000 Allan M. Nishimura, Westmont C. Coherence in Lo- calized States. $13,000 Bruce M. Simonson, Oberlin C. Costa Rican Carbonate Turbidites. $13,000 ACS-PRF grants for fundamental research in the petroleum field (Type G) David J. Morgans Jr., U of California, Santa Cruz. General Cyclopropane-Based Methodology for the Introduction of Asymmetric Centers into Organic Substrates. $10,000 David A. Yuen, Arizona State U. Crustal Fluid Dy- namics. $10,000 James E. Barrick, Texas Tech U. Conodont Biostra- tigraphy of Middle and Late Paleozoic Strata of the Quachita Facies, Marathon Region, Southwest Texas. $10,000 Dimitri A. Sverjensky, State U of New York, Stony Brook. Solutions and Rections That Formed Mis- sissippi Valley-Type Lead-Zinc Deposits. $10,000 May 10, 1982C&EN 53

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Page 1: ACS-PRF grants approved; amounts raised

ACS News

ACS-PRF grants approved; amounts raised Acting on recommendations from the February meeting of the PRF Advi­sory Board, the ACS Board of Direc­tors approved 89 new and continued ACS-PRF grants-in-aid. The board's action, taken at the 183rd ACS Na­tional Meeting in Las Vegas, adds $1,817,052 to PRF commitments for 1982. The new grants were selected from a total of 249 proposals.

The board of directors also ap­proved a $1.25 million increase in this year's Petroleum Research Fund grant budget to a new total of $8.45 million. Further, the maximum dollar value of PRF research grants was in­creased beginning in 1983. Type G (starter) grants will rise from $10,000 to $15,000 for two years, Type B grants (for undergraduate depart-

ACS-PRF Grants for Fundamental Research in the Petroleum Field (Type AC) Robert A. Moss, Rutgers U. Functional Vesicles as

Reagents in Organic Chemistry. $45,000 K. C. Nicolaou, U of Pennsylvania. Total Synthesis of

Endiandric Acid and Related Natural Products. $45,000

N. John Cooper, Harvard U. Mechanism and Stereo­chemistry of the Insertion of a Methylidene Ligand into a Transition Metal-Alkyl Linkage. $30,000

Joseph C. Salamone, U of Lowell. Ampholytic lono-mers from Ion-Pair Comonomers. $45,000

Philip H. Heckel, U of Iowa. Lithostratigraphy, Cor­relation, and Depositional-Diagenetic History of Middle and Upper Pennsylvanian Rocks, Midconti-nent North America. $30,000

James A. Austin Jr., U of Texas, Austin, Institute for Geophysics. Structural and Seismic Stratigraphic Evolution of the Southeastern Gulf of Mexico/Straits of Florida/Western Bahamas. $29,972

R. David Dallmeyer, U of Georgia. 40Ar/39 Ar Incre­mental-Release Dating of Selected Igneous and Metamorphic Lithologies Beneath the Southeastern Coastal Plain. $44,000

James R. Maxwell, U of Bristol, England. Origin and Significance of Sedimentary 4-Methyl Steroid Hy­drocarbons. $22,489

Robert E. Garrison, U of California, Santa Cruz. De-positional Environments, Phosphatization, and Dolomitization in the Lower Part of the Monterey Formation, Central California Coast Ranges. $30,000

W. Lester S. Andrews, U of Virginia. Matrix Synthesis and Infrared Spectroscopy of Monomeric Lithio-carbon Species. $30,000

Derek J. Hodgson, U of North Carolina, Chapel Hill. Exchange Interactions in Magnetically Condensed Complexes. $45,000

John A. Morrison, U of Illinois, Chicago Circle. Electron Deficient, Uniquely Reactive Cluster Com­pounds—the Polyhedral Boron Halides. $30,000

William E. Geiger Jr., U of Vermont. Reduction and Oxidation Pathways in Small Metal Cluster Com­pounds and Dimetallacycles. $30,000

Thomas N. Sorrell, U of North Carolina, Chapel Hill. Binuclear Complexes of Copper. $30,000

ments) from $13,000 to $15,000 for two years, and Type AC grants will move from $15,000 to $17,500 per year for up to three years, or a new maximum grant of $52,500.

Revised application forms for all types of ACS-PRF grants will be available shortly. Investigators may submit proposals at any time during the remainder of the year for funding in 1983. The "26th Annual Report on Research Under Sponsorship of the Petroleum Research Fund" has been published. Interested parties who wish to receive a complimentary copy of the report, or any of the new ap­plication forms, should contact Pe­troleum Research Fund, ACS, 1155—16th St., N.W., Washington, D.C. 20036, telephone (202) 872-4481.

Kenneth J. Klabunde, Kansas State U. Metal Vapor Chemistry. Matrix Isolation Spectroscopy Studies of Alkanes and Alkyl Halides. $45,000

Robert D. Bereman, North Carolina State U. Reso­nance-Induced Properties in New Dithiolene, Di-thiolate, Dithio- and Monothiocarbamate Com­plexes. $30,000

J. Christopher Dalton, Bowling Green State U. Pho­tochemistry of Acylsilanes and Reactions of Siloxycarbenes. $30,000

Martin Newcomb, Texas A&M U. Mechanistic Probes for Electron-Transfer Processes in Reactions of Hindered Lithium Dialkylamide Bases. $30,000

Matthew S. Platz, Ohio State U. m-Xylylene and Re­lated Compounds. $30,000

Donald C. DKtmer, Syracuse U. Significant Structures Derived from Thietes. $45,000

Richard P. Johnson, Iowa State U. Orbital Interaction by Design: Theory, Synthesis, and Chemical Prop­erties of Columnar Conjugated Molecules. $45,000

Carl R. Johnson, Wayne State U. Remote Substituent Effects on the Stereochemistry of Additions to Cy-clohexanones and Methylenecyclohexanes. $30,000

Harry G. Brrttaln, Seton Hall U. Luminescence Studies of Europium Oxide Catalysts. $42,000

Sherril D. Christian, U of Oklahoma. Vapor Pressure Studies of Dilute Aqueous Solutions of Alcohols. $45,000

Donald W. Setser, Kansas State U. Flowing Afterglow Studies of Electronically Excited-State Chemistry. $45,000

Jean H. Futrell, U of Utah. Reaction Dynamics Study of Collision-Induced Dissociation Reactions of Or­ganic Ions. $45,000

Sow-Hsin Chen, Massachusetts Institute of Technol­ogy. Study of Intra- and Intermicellar Structures by Small Angle Neutron Scattering. $45,000

Katharine L. Clarke Hunt, Michigan State U. Ab Initio and Approximate Calculations of Collision-Induced Dipoles and Polarizabilities. $30,000

David M. Hanson, State U of New York, Stony Brook. Charge Distributions in the Excited Vibronic States of Molecules. $45,000

Robert L. Powell, Washington U. Acoustic Streaming in Non-Newtonian Fluids. $45,000

William C. Conner Jr., U of Massachusetts. Rate of Hydrogen Surface Mobility and the Effect on Hy-drogenation and Dehydrogenation. $45,000

Donald R. Paul, Joel W. Barlow, U of Texas, Austin. Thermodynamics of Polymer Blends. $45,000

Liang-Shih Fan, Ohio State U. Fundamental Charac­teristics of the Gas-Liquid-Solid Fluidized-Bed Re­actor for Hydrocarbon Processings. $44,887

ACS-PRF grants for fundamental research in the petroleum field (Type B) Stanley H. Pine, California State U, Los Angeles. Ti­

tanium-Aluminum Carbenoid Complex. $13,000 Kenneth R. Fountain, Northeast Missouri State U.

Friedel-Crafts Reactions with Heterocummulene Complexes. $13,000

Suzanne W. Slayden, George Mason U. Electro-phile-lnduced Organoborate Rearrangements. $13,000

Alfons L. Baumstark, Georgia State U. Thermal De­composition of 1,2-Dioxetanes. $13,000

Claude H. Yoder, Franklin and Marshall C. Reactions of Ambident Substrates Containing Elements of Group IV. $13,000

Harold W. Heine, Bucknell U. Chemistry of Nitrones and Quinone Imides. $13,000

Samuel P. McManus, U of Alabama, Huntsville. Nucleophilic Displacement Reactions. $13,000

Thomas E. Goodwin, Hendrix C. Chiral Induction via rt-Chloronitrones. $13,000

Stephen K. Taylor, Olivet Nazarene C. Epoxide Friedel-Crafts Reactions. $13,000

Harold R. Pestana, Colby C. Carbonate Production by Sargassum Epibionts. $6894

Rodney F. Boyer, Hope C. Chelation in Iron Metabo­lism. $13,000

Wolfgang Christian, Earlham C. Energy Transfer in Gases. $13,000

Donald G. Kubler, Furman U. Does the Energy of Ac­tivation Change with Temperature for Sucrose Hy­drolysis? $13,000

James E. Conkin, U of Louisville. Devonian Ura­nium-Oil Shales. $13,000

Gerald F. Kokoszka, State U of New York, Pittsburgh. Multifrequency EPR Studies. $13,000

Allan M. Nishimura, Westmont C. Coherence in Lo­calized States. $13,000

Bruce M. Simonson, Oberlin C. Costa Rican Carbonate Turbidites. $13,000

ACS-PRF grants for fundamental research in the petroleum field (Type G) David J. Morgans Jr., U of California, Santa Cruz.

General Cyclopropane-Based Methodology for the Introduction of Asymmetric Centers into Organic Substrates. $10,000

David A. Yuen, Arizona State U. Crustal Fluid Dy­namics. $10,000

James E. Barrick, Texas Tech U. Conodont Biostra-tigraphy of Middle and Late Paleozoic Strata of the Quachita Facies, Marathon Region, Southwest Texas. $10,000

Dimitri A. Sverjensky, State U of New York, Stony Brook. Solutions and Rections That Formed Mis­sissippi Valley-Type Lead-Zinc Deposits. $10,000

May 10, 1982C&EN 53

Page 2: ACS-PRF grants approved; amounts raised

ACS News

Kevin P. Furlong, U of Wyoming. Time-Dependent Thermal Modeling of Forearc Basins During Evo­lution of Subduction Zones: Applications to Hy­drocarbon Maturation. $10,000

Kevin D. Crowley, U of Oklahoma. Investigation of Magnitude and Frequency of Depositional Events in the Sedimentary Record. $10,000

Allen F. Glazner, U of North Carolina, Chapel Hill. Geologic Effects of Tertiary Subduction of the Mendocino Fracture Zone Under the Southwestern U.S. $10,000

Robert J. Stern, U of Texas, Dallas. Evolution of Pre-cambrian Basement in the Gulf of Suez Region, Egypt. $10,000

William M. Dunne, West Virginia U. Mesostructural Suites in Lithotectonic Units Within the Central Appalachians. $10,000

David W. Mohr, Texas A&M U. Role of Carbon and Sulfur in Regional Metamorphism of Shales, Southwestern North Carolina and Adjacent Portions of Tennessee. $10,000

Thomas C. Pinkerton, Purdue U. Reduction of Per-technetate in Aqueous Complexing Media. $10,000

George G. Stanley, Washington U. Ligand-Constrained Metal Clusters. $10,000

Douglas E. Johnson, North Dakota State U. Homo­geneous Model for Hydrodesulfurization. $10,000

Nathan S. Lewis, Stanford U. Reactivity of Homo-polyatomic Metal Clusters. $10,000

Lawrence C. Thomas, Oregon State U. Development of Methods for Comparing Multivariate Chemical Data That Show Relatively Large Irreproducibilities. $10,000

James Terner, Virginia Commonwealth U. Mixing Resonance Raman Spectroscopy of Peroxidase and Catalase Intermediates. $10,000

Michael T. Crimmlns, U of North Carolina, Chapel Hill. Studies in Intramolecular Photocycloadditions: an Approach to Pentalenic Acid. $10,000

Robert R. Squires, Purdue U. Rearrangements of Gas Phase Organic Anions as Studied by the Flowing Afterglow Technique. $10,000

Ronald W. Woodard, U of Michigan. Stereochemistry of ACC Deaminase. $10,000

Hector D. Abruna, U of Puerto Rico, Rio Piedras. Studies on Mesophases and Their Potential Role as Host Matrices in Electrochemical Processes. $10,000

Richard H. Guy, U of California, San Francisco. Capillary Diffusion and Interfacial Transfer Kinetics. $10,000

Ken A. Dill, U of Florida. Molecular Theory for Solutes in Interphases. $10,000

David H. Parker, U of California, Santa Cruz. Multi-photon Ionization Spectroscopy. $10,000

John E. Adams, U of Missouri, Columbia. Adsorbate Sticking and Energy Transfer at Solid Surfaces. $10,000

Mark Sulkes, Tulane U. Low-Energy Collision-Induced Vibrational Relaxation in Polyatomic Molecules. $10,000

Gregory A. Parker, U of Oklahoma. Theoretical De­termination of the Ar + CO Vibrational and Rota­tional Relaxation Rate Constants. $10,000

James L. Skinner, Columbia U. Theory of Time-De­pendent Phenomena in Condensed Phases. $10,000

John F. Scamehorn, U of Oklahoma. Study of Inter­actions Between Ionic and Nonionic Surfactants. $10,000

Shaw-Horng Chen, U of Rochester. Tracer Diffusion in Supercritical Hydrocarbons. $10,000

John W. Hanneken, Memphis State U. Hydrogen Electrotransport in Metals. $10,000

Joseph L. Graf Jr., Kansas State U. Use of REE to Trace the Paths of the Solutions Which Deposited Pb-Zn Ores in Carbonate Rocks, Virburnum Trend, Missouri. $10,000

Paul A. Baker, Duke U. Experimental Formation and Surface Chemistry of Dolomite. $10,000

Stephen J. Culver, Oklahoma State U. Gulf of Mexico Foraminiferal Morphology and Environment: Ap­plications to Paleodepth Estimates for Petroleum Exploration. $10,000

Stanley C. Finney, Oklahoma State U. Ordovician Graptolite Biostratigraphy of Arbuckle and Ouachita Mountains, Oklahoma-Arkansas. $10,000

ACS-PRF scientific education grants (SE) Kamil Klier, on behalf of Lehigh U. Symposium on

Advanced Methods of Catalyst Characterization, Materials Research Society Meeting in Boston, Nov. 1-4, 1982. $2550

Joseph B. Lambert, on behalf of the ACS Subdivision of Archaeological Chemistry. 7th American Sym­posium on Archaeological Chemistry at the ACS national meeting in Kansas City, September 1982. $2550

John M. Sharp Jr., on behalf of the U of Missouri for the Geological Society of America. Penrose Con­ference on Hydrodynamics and Geochemical Controls on Ore Generation in Sedimentary Envi­ronments at Lake of the Ozarks, Mo., May 1982. $3310

Patricia L. M. Plummer, on behalf of the ACS Division of Colloid & Surface Chemistry. Vlth International Symposium on the Physics and Chemistry of Ice at the U of Missouri, Rolla, in August 1982. $2000

Kashmiri L. Mittal, on behalf of the ACS Division of Organic Coatings & Plastics Chemistry. International Symposium on Adhesive Joints: Their Formation, Characteristics, and Testing at the ACS national meeting in Kansas City, September 1982. $3400

Sakharov scholarship fund established At its recent meeting in Las Vegas, the ACS Board of Directors adopted a recommendation by the Committee on International Activities to invite ACS members to make voluntary contributions to the Sakharov Scholarship Fund. Recently initiated by the Sakharov International Com­mittee Inc., the fund is to honor and promote the ideals of academician Andrei Sakharov, member of the Academy of Sciences of the U.S.S.R., Nobel Peace Laureate, and an advo­cate of human rights.

According to the letter to the ACS executive director Raymond P. Mar-iella from the president of the Sa­kharov International Committee Sheldon Glashow, the fund is to be used to "award scholarships to qual­ified students dedicated to the pur­suit of Sakharov's scientific or humanistic goals, and prizes to sci­entists who, in addition to outstand­ing achievements in their fields, also are deeply devoted to the cause of human liberty. It also will offer direct material assistance to scientists per­secuted for their advocacy of human

rights. All individuals or organiza­tions who join the Sakharov Fund could participate in the nominations of these awards."

The board also approved the com­mittee's recommendation that ACS serve as a focal point for any contri­butions that members may wish to make to the Sakharov Scholarship Committee. Checks should be made out to Sakharov International Com­mittee and sent to Gordon Bixler, Office of International Activities, ACS, 1155—16th St., N.W., Wash­ington, D.C. 20036. D

Letters

Continued from page 4 This correspondence contains several mis­leading statements and suggests widely held misconceptions concerning SI. In particular, there appears to be a perception of undue r i­gidity about SI that should be dispelled.

The following salient points may be distilled from the full description in Special Publication 330:

1. SI is a single system consisting of base units, derived units, supplementary units, and units formed by attachment of the approved SI prefixes to any of the above. All these sub­classes have fully acceptable status. In addition, certain other units outside SI are recognized for use with SI, such as the minute, hour, bar, ang­strom, and others.

2. The subset of SI consisting of base, de­rived, and supplementary units forms a "co ­herent set of units." While coherent units have obvious advantages in certain circumstances, nothing in Special Publication 330 can be con­strued as suggesting that units formed with SI prefixes (and therefore "noncoherent") are forbidden or discouraged. This should be a per­sonal choice of teachers or authors, based on the convenience in doing calculations. It would appear unwise for organizations or journals to adopt a rigid policy in this regard.

3. Units formed with SI prefixes can be used in any desired combination. Thus, expressions such as g /cm 3 and j imol /L are perfectly ac­ceptable. One may find that use of the equivalent forms Mg/m 3 and mmol /m3 , respectively, simplifies certain calculations, but nothing in the SI rules requires this form.

In summary, SI has been designed to provide a system of units that is flexible enough to ac­commodate the needs of all fields of science and technology, thereby making it unncessary to introduce specialized units that impede scientific communication. Excessively rigid interpretations of SI tend to defeat its purpose. Chemists are urged to consult Special Publication 330 or the IUPAC Manual of Symbols and Terminology for Physiochemical Quantities and Units for the authoritative information on SI.

David R. Lide Jr. Chief, Office of Standard Reference Data, Na­

tional Bureau of Standards; Former Chairman, IUPAC Commission on Symbols, Terminology & Units

54 C&ENMay 10, 1982