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Gold(I) Complexes Bearing Sterically Imposing, Saturated Six- and Seven-Membered Expanded Ring N-Heterocyclic Carbene Ligands

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posted on 2012-06-11, 00:00 authored by Jay J. Dunsford, Kingsley J. Cavell, Benson M. Kariuki
The synthesis and characterization of novel six- and seven-membered expanded ring N-heterocyclic carbene (NHC) complexes of the general formula [Au­(NHC)­Cl] are described. The key structural parameters of complexes 1, 2, and 4 have been evaluated by solid-state analysis and by means of the percent buried volume (%Vbur) analysis. Complex 4 is found to demonstrate the largest %Vbur value of any gold­(I) NHC complex reported to date, with a value of 52.6. All complexes 14 have been evaluated in a preliminary catalytic survey of the hydration of internal alkynes.

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