Synthesis and Characterization of an Eclipsed Digermylene as a Building Block to Construct a Cyclic Octagermylene

摘要

The preparation of an unprecedented GeI-GeI bonded digermylene [K-2{Ge-2(mu-kappa(2):eta(2):eta(4)-2,6-(2,6-(Pr2C6H3)-Pr-i-N)(2)-4-CH3C5H2N)(2)}] in an eclipsed conformation stabilized by two bridging diamidopyridyl ligands is presented. Although it exhibits an eclipsed conformation, the Ge-Ge bond length is 2.5168(6) angstrom, which is shorter than those in the trans-bent and gauche digermylenes. In combination with two pendant amido groups, the Ge-2(I) motif is employed as a building block to assemble the first example of octagermylene [Ge-4(mu-kappa(2):kappa(1)-2,6-(2,6-(Pr2C6H3)-Pr-i-N)(2)-4-CH3C5H2N)(2)](2) showing a cyclic configuration and containing three distinct types of GeI-GeI bonds.