The effect of replacing carbonyl with acetonitrile on the reactivity of the bimetallic system [Mo2Cp2(μ-SMe)3(L)2]+ (L=CO, CH3CN). Crystal structure of [Mo2Cp2(μ-SMe)2(CH3CN) 4](BF4)2 - Université de Bretagne Occidentale Access content directly
Journal Articles Inorganica Chimica Acta Year : 1999

The effect of replacing carbonyl with acetonitrile on the reactivity of the bimetallic system [Mo2Cp2(μ-SMe)3(L)2]+ (L=CO, CH3CN). Crystal structure of [Mo2Cp2(μ-SMe)2(CH3CN) 4](BF4)2

Abstract

[Mo2Cp2(μ-SMe)3(CH3CN) 2](BF4) (1) reacts with H[BF4] in acetonitrile at room temperature to give the tetrakis (acetonitrile) compound [Mo2Cp2(μ-SMe)2(CH3CN) 4](BF4)2 (3) through replacement of one SMe bridge by two terminal CH3CN ligands. In sharp contrast, the carbonyl analogue [Mo2Cp2(μ-SMe)3(CO)2]+ (2) fails to undergo a similar reaction. This suggests that the electronic properties of the ancillary ligands L in the [Mo2Cp2(μ-SMe)3L2]+ moiety govern the activation of a sulfur atom in protonation reactions. An X-ray diffraction study shows that 3 contains two CpMo(CH3CN)2 units bridged by two SMe groups and linked by a long Mo-Mo bond of 3.000(1) Å.

Dates and versions

hal-01771400 , version 1 (19-04-2018)

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Philippe P. Schollhammer, François Pétillon, J. Talarmin, K.W. Muir. The effect of replacing carbonyl with acetonitrile on the reactivity of the bimetallic system [Mo2Cp2(μ-SMe)3(L)2]+ (L=CO, CH3CN). Crystal structure of [Mo2Cp2(μ-SMe)2(CH3CN) 4](BF4)2. Inorganica Chimica Acta, 1999, 284, pp.107--111. ⟨10.1016/S0020-1693(98)00266-7⟩. ⟨hal-01771400⟩
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