Steric Size in Conformational Analysis. Steric Compression Analyzed by Circular Dichroism Spectroscopy
作者:Stefan E. Boiadjiev、David A. Lightner
DOI:10.1021/ja002069c
日期:2000.11.22
methyl, ethyl, isopropyl, tert-butyl, phenyl, and benzyl groups has been determined from a sensitive tetrapyrrole model and exciton coupling circular dichroism (CD) measurements. Unlike the classical cyclohexane model, from which the relative steric demand of functional groups has been assessed quantitatively (A-values) and is based on the preference for equatorial vs axial orientations, the bilirubin