Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/95157
Title: Synthesis, crystal structures and dynamic NMR studies of novel trinuclear copper(I) halide complexes with 2,5-bis[(diphenylphosphino)-methyl]thiophene
Authors: Chen, B.-L.
Mok, K.-F. 
Ng, S.-C. 
Issue Date: 1998
Source: Chen, B.-L.,Mok, K.-F.,Ng, S.-C. (1998). Synthesis, crystal structures and dynamic NMR studies of novel trinuclear copper(I) halide complexes with 2,5-bis[(diphenylphosphino)-methyl]thiophene. Journal of the Chemical Society - Dalton Transactions (17) : 2861-2866. ScholarBank@NUS Repository.
Abstract: Novel trinuclear copper(I) halide complexes with 2,5-bis[(diphenylphosphino)methyl]thiophene (dpmt), [Cu3(μ3-X)(μ-X)2(μ-dpmt)2] (X = 11, Br 2 or Cl 3), have been synthesized and structurally characterised. They have unusual three-runged ladder structures with one triple-bridging and two double-bridging halide atoms. Two of the CuI are tetrahedrally co-ordinated and one, in the middle of the structure unit, has trigonal co-ordination geometry. The trinuclear Cu3(μ3-X)(μ-X)2 framework shows some changes with halide anion X due to the size effect and intramolecular non-bonding Cu⋯Cu and X⋯X interactions. The NMR studies showed that the trinuclear framework is retained in solution for 1 (X = I), is in equilibrium with Cu3(μ-X)3 for 2 (X = Br) and changes to Cu3(μ-Cl)3 for 3 (X = Cl), an effect attributable to the decrease of halide size from iodide to chloride. The frameworks in the solutions of 2 and 3 exhibit fluxional behaviour involving bromine and chlorine mobility respectively.
Source Title: Journal of the Chemical Society - Dalton Transactions
URI: http://scholarbank.nus.edu.sg/handle/10635/95157
ISSN: 03009246
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