Journal
DALTON TRANSACTIONS
Volume 46, Issue 11, Pages 3642-3648Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7dt00051k
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Funding
- AcRF Tier 1 grant [RG 06/14]
- ASTAR SERC PSF grant
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The coordination chemistry of an amidinato silylene and germylene toward group 14 element(II) halides is described. The reaction of the amidinato silicon(II) amide [LSiN(SiMe3)(2)] (1, L = PhC(NtBu)(2)) with SnCl2 and PbBr2 afforded the amidinato silylene-dichlorostannylene and -dibromoplumbylene adducts [L{(Me3Si)(2)N}SiEX2] (E = Sn, X = Cl (2); E = Pb, X = Br (3)), respectively, in which there is a lone pair of electrons on the Sn(II) and Pb(II) atoms. X-ray crystallography, NMR spectroscopy and theoretical studies show conclusively that the Si(II)-E(II) bonds are donor-acceptor interactions. Similar electronic structures were found in the amidinato germylene-dichlorogermylene and -dichlorostannylene adducts [L{(Me3Si)(2)N} GeECl2] (E = Ge (5), Sn (6)), which were prepared by treatment of the amidinato germanium(II) amide [LGeN(SiMe3)(2)] (4) withGeCl(2).dioxane and SnCl2, respectively.
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