b.sc hons (chemistry) sem-i , paper cc-1 dr. indranil
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STEREOCHEMISTRY
Part-IV
Nomenclature of Organic Compounds
B.Sc Hons (Chemistry)
Sem-I , Paper CC-1
Dr. Indranil ChakrabortyKharagpur College
Absolute Nomenclature
Flying Wedge
4/2 back + ve, 1/3 back –ve4/2 front – ve, 1/3 front + ve
Lowest priority group 1 to 2 to 3 Configuration
Back /Away from the viewer Clock wise R
Back /Away from the viewer Anti- Clock wise S
Front / Close to the viewer Clock wise S
Front / Close to the viewer Anti- Clock wise R
Even back + ve, Even front – veOdd back – ve, Odd front + ve
Relative Configuration
D/L system of nomenclature
Threo/ Erythro nomenclature
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