The metallacycloalkanes Cp activated Re(CO)2(CH2)5 (2) and Cp activated Re(CO)2(CH2)4 (3) (Cp = eta-5-C5H5) have been prepared by cationic alkylation of CpRe(CO)2H2 (1) with pentane-1,5- and butane-1,4-diylbis(trifluoromethane-sulfonate), respectively, in the presence of the amine base 1,8-bicyclo [5.4.0]undec-7-ene (DBU). Both rhenium heterocyclic complexes have been identified and characterized by H-1 and C-13{H-1} NMR, mass, and IR spectroscopic methods and by elemental analysis. Thermolysis of 2 results in the formation of CpRe(CO)3, 1-pentene, and cyclopentane.
Characterization and evidence for alkylation of hydridodicarbonylcyclopentadienylrhenate(1-) ion [CpRe(CO)2H-] in the conversion of dihydrodicarbonylcyclopentadienylrhenium [CpRe(CO)2H2] to CpRe(CO)2R2. Synthesis of a rhenacyclopentane and its thermolysis to methylcyclopropane
作者:Gilbert K. Yang、Robert G. Bergman
DOI:10.1021/ja00359a029
日期:1983.10
YANG, G. K.;BERGMAN, R. G., ORGANOMETALLICS, 1985, 4, N 1, 129-138