Solution and solid state conformation of Fischer carbene complexes vis-à-vis conformation of aryl carboxamides: complexation of the aromatic ring by tricarbonylchromium makes a difference
作者:K.N Jayaprakash、Debasis Hazra、Karl S Hagen、Uttamkumar Samanta、Mohan M Bhadbhade、Vedavati G Puranik、Amitabha Sarkar
DOI:10.1016/s0022-328x(00)00728-2
日期:2001.1
Crystallography and proton NMR spectroscopy were used to compare the conformations of aryl amino Fischer carbene complexes with structurally analogous aryl carboxamides. The similarity disappears when the aromatic rings were complexed with tricarbonylchromium groups. Details of synthesis, spectral and analytical data for all new compounds are provided.
Effects of a meta-or para-electron withdrawing substituent on benzylic functionalization of arene–chromium–tricarbonyl complexes have been studied; tricarbonyl η6-( t-butyl 3,4-dimethylbenzoate)} chromium promoted the attachment of the CRHOH group exclusively at the 4-methyl group, while the 3-methyl group remained unchanged.