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

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, whic...

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Published in:Angewandte Chemie International Edition 2017-11, Vol.56 (47), p.15108-15112
Main Authors: Wey, Yu‐Te, Yang, Fan‐Shan, Yu, Hsien‐Cheng, Kuo, Ting‐Shen, Tsai, Yi‐Chou
Format: Article
Language:English
Subjects:
Conformation
eclipsed conformation
germanium
germylenes
main-group compounds
trans-bent geometry
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Summary: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).
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201708551