<sup>13</sup>C nuclear magnetic resonance spectra of methoxycyclohexane derivatives. Rotamer populations about C–OMe bonds as indicated by<sup>13</sup>C chemical shifts of methoxy- and ring-carbons and<sup>3</sup>J<sub>C,H</sub>coupling constants
作者:Alan H. Haines、Mohammad Seyedi Shandiz
DOI:10.1039/p19810001671
日期:——
Methoxy 13C chemical shifts in methoxycyclohexane derivatives may be rationalized in terms of rotamer populations about the C–OMe bond and δ1-effects caused by steric interaction of the methoxy-group with substituents at the neighbouring 2- and 6-positions. Information on rotamer populations is obtained also from the 13C chemical shifts of C-2 and C-6, and from the three-bond coupling between the proton
甲氧基13下在methoxycyclohexane衍生物的化学位移可以在关于C-OME键的旋转异构体群的术语和δ合理化1个效果-由与在相邻的取代基的2-和6-位的甲氧基的基团的空间相互作用。还可从C-2和C-6的13 C化学位移,以及C-1的质子和甲氧基-碳原子之间的三键耦合获得有关旋转异构体种群的信息。