Circular Dichroism of Some Isomeric Alkyl Pyridines

Article abstract of DOI:10.1002/hlca.19820650717

The UV. and CD. spectra of the optically active 2-, 3- and 4-(1-methylpropyl)-pyridines (1a,b,c) and of the corresponding (2-methylbutyl)pyridines (2a,b,c) have been investigated in hexane at RT. and at -85 deg C, in hexane/TFA and in aqueous HCl-solution.In 1c and 2c both the n -> ?^* and the ? -> ?^* transitions are optically active, an n -> ?^* transition being located above 265 nm.The position and the sign of the CD. bands are greatly influenced by the position and the nature of the alkyl substituent.