The Carbon-13 NMR Spectra and Electronic Structure of 3<i>H</i>-Phenothiazin-3-one and Its Methyl Derivatives
作者:Kan-ichi Hasegawa、Yoshio Ueno
DOI:10.1246/bcsj.57.510
日期:1984.2
The 13C NMR chemical shifts of 3H-phenothiazin-3-one (1) and eleven of its methyl derivatives are reported. The effect of including sulfur 3d orbitals is discussed in relation to the 13C chemical shifts. The chemical shifts of 1 can be explained in terms of both the successive polarization of the long π-conjugated framework promoted by the carbonyl group and the contribution of the sulfur d-orbitals
报告了 3H-phenothiazin-3-one (1) 及其十一种甲基衍生物的 13C NMR 化学位移。包括硫 3d 轨道的影响与 13C 化学位移有关。1 的化学位移可以通过羰基促进的长 π 共轭骨架的连续极化和硫 d 轨道的贡献来解释。13C 化学位移与通过 sp 基组计算的 CNDO/2 π- 和总电子密度的相关性比通过 spd 基组计算的更好,但通过降低 d 的范围获得了改进的相关性- 硫的轨道参与。从 13C 化学位移与 CNDO/2 sp π- 和 1 和单甲基衍生物的所有碳的总电子密度的相关性,