Crystal structure (at –40°) of tetrakis[trimethylsilylmethylcopper(I)], an alkyl bridged, square planar, tetranuclear copper(I) cluster

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Abstract
(Me3SiCH2Cu)4 consists of discrete, centrosymmetric, tetrameric units containing a square plane of copper atoms (Cu–Cu 2·42 Å), with the methylene carbons luing in the same plane and bridging the edges.