Crystal and molecular structure of a photoisomer of an oxodipyrromethene: the E-isomer of 3,4-dimethyl-2,2′-pyrromethen-5(1H)-one
作者:Akira Hori、Stefano Mangani、Gerard Pèpe、Edgar F. Meyer、David L. Cullen、Heinz Falk、Karl Grubmayr
DOI:10.1039/p29810001525
日期:——
The structure of the E-isomer of an oxodipyrromethene, 3,4-dimethyl-2,2′-pyrromethen-5(1H)-one, C11H12N2O, has been determined. This was obtained by photoisomerization from the Z-isomer. It crystallizes in the monoclinic space group P21/a with a= 10.479(3), b= 8.643(2), c= 11.926(2)Å, β= 114.07(1)°, Z= 4. The structure was solved by direct methods and refined by full-matrix least-squares to an R factor
已经确定了氧二吡咯亚甲基的3,4-二甲基-2,2′-吡咯亚甲基-5(1 H)-1 ,C 11 H 12 N 2 O的E-异构体的结构。这是通过从Z-异构体进行光异构化获得的。该晶体的斜空间群中P 2 1 /一个与一个= 10.479(3),b = 8.643(2),C ^ = 11.926(2)埃,β= 114.07(1)°,Ž = 4的结构是通过直接方法求解,并通过全矩阵最小二乘法细化为R系数为0.064。该分子呈抗斜构象,围绕次甲基单键的二面角为49.8°。每个氧原子氢键合到位于两个不同分子上的两个氮原子上。键的长度和角度与Z异构体中的键长度和角度相似。