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Unprecedented solvent induced inter-conversion between monomeric and dimeric silylene–zinc iodide adducts

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Abstract

Usually, when a silylene reacts with a transition metal Lewis acid, it forms an adduct which could be either monomeric or dimeric. However, we present here that a silylene, [PhC(NtBu)2SiN(SiMe3)2] can form both monomeric [PhC(NtBu)2Si{N(SiMe3)2} → ZnI2]·THF (1) and dimeric [{PhC(NtBu)2}(N(SiMe3)2)SiZnI,(μ-I)]2 (2) adducts upon reaction with ZnI2. The formation of 1 and 2 relies upon the solvent used for the reaction or crystallization. When the crystallization is carried out in THF complex 1 is formed, however, when the reaction and crystallization are performed in acetonitrile complex 2 is obtained. Both 1 and 2 were structurally authenticated and the nature of the Si–Zn bond in these complexes was determined by quantum chemical calculations. In addition, a spontaneous inter-conversion between 1 and 2 just by changing the solvents has been also observed; a feature presently not known for silylene-transition metal Lewis adducts.

Graphical abstract: Unprecedented solvent induced inter-conversion between monomeric and dimeric silylene–zinc iodide adducts

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Publication details

The article was received on 19 May 2017, accepted on 02 Aug 2017 and first published on 02 Aug 2017


Article type: Paper
DOI: 10.1039/C7DT01823A
Citation: Dalton Trans., 2017, Advance Article
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    Unprecedented solvent induced inter-conversion between monomeric and dimeric silylene–zinc iodide adducts

    S. Yadav, E. Sangtani, D. Dhawan, R. G. Gonnade, D. Ghosh and S. S. Sen, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT01823A

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