DYNAMIC STEREOCHEMISTRY OF DI(3-METHYL-1-AZULENYL)PHENYLMETHYL CATION - FLIP OF ONE AZULENE RING AS THE THRESHOLD ROTATION MECHANISM

被引：7

作者：

ITO, S ^{[1
]}

MORITA, N ^{[1
]}

ASAO, T ^{[1
]}

机构：

[1] TOHOKU UNIV, FAC SCI, DEPT CHEM, AOBA KU, SENDAI, MIYAGI 980, JAPAN

来源：

CHEMISTRY LETTERS | 1994年 / 03期

关键词：

D O I：

10.1246/cl.1994.477

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dynamic stereochemistry of di(3-methyl-1-azulenyl)phenylmethyl hexafluorophosphate (5) was studied by temperature dependent H-1 NMR spectra. The low temperature NMR indicated that the compound (5) exists in three propeller conformations (C-1 and two C-2 symmetry), and at higher temperature the spectra reflect rapid isomerization, which were interpreted by the flip mechanism of one azulene ring. The processes have activation energies of 53.8 and 45.2 kJ mol(-1).

引用

页码：477 / 480

页数：4

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