Angewandte Chemie - International Edition
Angewandte Chemie - International Edition
5 years ago

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

Synthesis and Characterization of an Eclipsed Digermylene as a Building Block to Construct a Cyclic Octagermylene
Yi-Chou Tsai, Fan-Shan Yang, Ting-Shen Kuo, Yu-Te Wey, Hsien-Cheng Yu
The preparation of an unprecedented GeI-GeI bonded digermylene [K2{Ge2(μ-κ2:η2:η4-2,6-(2,6-iPr2C6H3-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) Å, which is shorter than those in the trans-bent and gauche digermylenes. In combination with two pendant amido groups, the GeI2 motif is employed as a building block to assemble the first example of octagermylene [Ge4(μ-κ2:κ1-2,6-(2,6-iPr2C6H3-N)2-4-CH3C5H2N)2]2 showing a cyclic configuration and containing three distinct types of GeI−GeI bonds. Eclipse at the heart: In contrast to many examples of trans-bent digermylenes with a staggered configuration, a digermylene with an eclipsed geometry has now been characterized. The eclipsed digermylene was employed as a building block to assemble a cyclic octagermylene containing three types of GeI−GeI bonds (see picture; Ge brown, N pink).

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201708551

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