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Unusual bonding: A ligand system that promotes formation of a rare μ-η1:η1 acetonitrile-bridged dicopper(I) complex (see picture) has been developed. The acetonitrile ligand is involved in a three-center two-electron bond supported by a cuprophilic interaction. The labile acetonitrile ligand can be substituted with xylyl isocyanide or CO.
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Davenport et al. (2011) studied this question.
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