Organometallics 1987, 6, 2426-2431
2426
Alkyne-Bridged Dicopper( I ) Complexes of the Tropocoronand Macrocycles Gilbert0 M. Villacorta, Dan Gibson, Ian D. Williams, Edward Whang, and Stephen J. Lippard” Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02 139 Received April 22, 1987
T h e synthesis, characterization, and chemical properties of alkyne-bridged binuclear copper(1) tropocoronand complexes are described. Two methods, employing labile copper(1) acetonitrile or carbon monoxide intermediates, were used t o prepare [Cuz(p-DEAD)(TC-6,6)] (1) and [Cuz(p-DMAD)(TC-6,6)] (2), where DEAD and DMAD are the diethyl and dimethyl esters of acetylenedicarboxylic acid, respectively, and TC-6,6 is the tropocoronand ligand having six methylene groups in the two linker chains connecting the aminotroponeiminate poles of the macrocycle. T h e diaryl- and dialkyl-substituted alkyne complexes [Cu2&-PhC
