THE ROLE OF DEGENERAT E

STATES IN CHEMISTRY

ADVANCES IN CHEMICAL PHYSIC SVOLUME 124

MICHAEL BAER and GERT DUE BILLING

EARLY PERSPECTIVES ON GEOMETRIC PHASE

1By M. S. Child

THE ELECTRONIC NON-ADIABATIC COUPLING TERM I NMOLECULAR SYSTEMS : A THEORETICAL APPROACH

3 9By Michael Bae r

NON-ADIABATIC EFFECTS IN CHEMICAL REACTIONS : EXTENDEDBORN-OPPENHEIMER EQUATIONS AND ITS APPLICATIONS

14 3By Satrajit Adhikari and Gert Due Billin g

COMPLEX STATES OF SIMPLE MOLECULAR SYSTEMS

19 7By R. Englman and A . Yahalom

QUANTUM REACTION DYNAMICS FOR MULTIPL E

ELECTRONIC STATES

283

By Aron Kuppermann and Ravinder Abro l

ELECTRON NUCLEAR DYNAMICS

323By Yngve Ohm and Erik Deumen s

APPLYING DIRECT MOLECULAR DYNAMICS T O

NON-ADIABATIC SYSTEMS

355By G. A. Worth and M. A. Robb

CONICAL INTERSECTIONS IN MOLECULAR PHOTOCHEMISTRY :THE PHASE-CHANGE APPROACH

433By Yehuda Haas and Shmuel Zilberg

THE CRUDE BORN-OPPENHEIMER ADIABATIC APPROXIMATIO NOF MOLECULAR POTENTIAL ENERGIES

505By K. K. Liang, J. C. Jiang, V. V. Kislov,A. M. Mebel, and S. H. Lin

CONICAL INTERSECTIONS AND THE SPIN-ORBIT INTERACTION

557By Spiridoula Matsika and David R. Yarkony

RENNER-TELLER EFFECT AND SPIN-ORBIT COUPLIN G

IN TRIATOMIC AND TETRAATOMIC MOLECULES

58 3By Miljenko Peric and Sigrid D. Peyerimhoff

PERMUTATIONAL SYMMETRY ANI) THE ROLE OF NUCLEA R

SPIN IN THE VIBRATIONAL SPECTRA OF MOLECULES IN DOUBL Y

DEGENERATE ELECTRONIC STATES : THE TRIMERS OF 2 S ATOMS

659

By A. J. C. Varandas and Z . R . Xu

AUTHOR INDEX

743

SUBJECT INDEX

765