The circular dichroism of some 2,2′-bridged biphenyls. The absolute configuration of (+)-6,7-diphenyldibenzo[e,g][1,4]diazocine-3,10-dicarboxylic acid
作者:Joan M. Insole
DOI:10.1039/j39710001712
日期:——
The principal features of the c.d. (solutions in dioxan) of (+)-6,7-diphenyldibenzo[e,g][1,4]diazocine-3,10-di-carboxylic acid (1a), of (S)-(+)-1,12-dimethyl-6,7-diphenyldibenzo[e,g][1,4]diazocine (1b), and of (S)-(+)-1,11-dimethyl-6-phenyl-5H-dibenzo[d,f][1,3]diazepine (6a) are a positive long-wave Cotton effect and a negative short-wave conjugation band Cotton effect; the (+)-dicarboxydiazocine has
(S)- (+)-6,7-二苯基二苯并[ e,g ] [1,4]重氮电影-3,10-二羧酸(1a)的cd(在二恶烷中的溶液)的主要特征(+)-1,12-二甲基-6,7-二苯基二苯并[ e,g ] [1,4]重氮电影(1b)和(S)-(+)-1,11-二甲基-6-苯基- 5 H-二苯并[ d,f ] [1,3]二氮杂((6a)为正长波棉效应和负短波共轭带棉效应;(+)-二羧基重氮电影已被指定为S-配置。几种6,7-二苯基二苯并[ e,g ] [1,4]重氮电影和6-苯基-5 H-二苯并-[ d,f给出] [1,3]二氮杂s。(S)-(+)-1,11-二甲基-5 H-二苯并[ d,f ] [1,3]二氮杂-6-6(7 H)-的cd(在二甲亚砜中的溶液;大于250 nm)(8a)显示了两个负面的棉花效应。