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Bimolecular fusion of [Pd3(μ-CN-C6H3Me2-2,6)3(CN-C6H3Me2-2,6)3] induced by Ph2GeH2: formation of the redox-active Pd6Ge2 complex†
Take-aki Koizumi,Kimiya Tanaka,Yoshitaka Tsuchido,Makoto Tanabe,Tomohito Ide,Kohtaro Osakada
Dalton Transactions Pub Date : 04/25/2019 00:00:00 , DOI:10.1039/C9DT00814D
Abstract

The reaction of Ph2GeH2 with a planar tripalladium(0) complex, [Pd3(μ-CN-C6H3Me2-2,6)3(CN-C6H3Me2-2,6)3], selectively afforded a hexagonal bipyramidal Pd6Ge2 complex, [Pd6(μ-GePh2)2(CN-C6H3Me2-2,6)8(μ-CN-C6H3Me2-2,6)2]. The molecule is stabilized by bridging coordination of isonitrile and GePh2 ligands, although all the Pd–Pd bonds are weak, as revealed by DFT calculations. The resulting complex undergoes two successive redox processes at E1/2 = −1.35 and −1.03 V (vs. Fc+/Fc), which correspond to the stepwise oxidation of the Pd(0)6 complex.

Graphical abstract: Bimolecular fusion of [Pd3(μ-CN-C6H3Me2-2,6)3(CN-C6H3Me2-2,6)3] induced by Ph2GeH2: formation of the redox-active Pd6Ge2 complex
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