INOR 22-Organometallic chemistry of a guanidine-substituted tris(trimethylsilyl)methyl ligand

Coles, Martyn (2008) INOR 22-Organometallic chemistry of a guanidine-substituted tris(trimethylsilyl)methyl ligand. In: 235th American-Chemical-Society National Meeting, New Orleans, LA.

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The organometallic chemistry of the silicon-substituted tris(trimethylsilyl)methide ('trisyl') anion, [C(SiMe3)3]–, has been enhanced through the incorporation of additional donor substituents (L) able to chelate to the metal centre. To date, such species of general formula [C(SiMe3)n(SiMe2L)3-n]–, have been restricted to those in which a four- or five-membered metallacycle are formed, illustrated for L = NMe2 (A) and 2-pyridyl (B), respectively. We anticipated that upon chelation to a metal, the guanidyl-substituted derivative, HC(SiMe3)2(SiMe2hpp) (hppH = 1,3,4,6,7,8,-hexahydro-2H-pyrimido[1,2-a]pyrimidine) would enhance the bulk of these already sterically demanding ligands through formation of a six-membered metallacycle (C), and strong donation from the imine nitrogen would stabilize otherwise highly reactive organometallics. In this presentation we report some early results of the chemistry of this new addition to the family of substituted trisyl-ligands, focusing on their structural chemistry as determined by X-ray crystallography.

Item Type: Conference or Workshop Item (Paper)
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Martyn Coles
Date Deposited: 06 Feb 2012 20:05
Last Modified: 31 May 2012 16:11
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