Dynamic equilibrium between dissociation and regeneration of the C–C bond in trispiro-conjoined cyclopropane compound
摘要:
The oxidation of 2,2-di(3,5-di-i-butyl-4-hydroxyphenyl)indan-1,3-dione by potassium hexacyanoferrate(III) afforded a trispiro-conjoined cyclopropane compound due to the bond formation between the ipso-carbons. Its cyclopropane ring was found to exist in solution in dynamic equilibrium with biradical species by the dissociation of the C-C bond, which is as long as 1.595 angstrom as revealed by X-ray crystal analysis. (C) 2007 Elsevier Ltd. All rights reserved.