Abstract
Treatment of R2SiCl2 (R = Me, Ph) with 2-aminopyridine in the presence of NEt3 led to the formation of the bis(N-2-pyridylamino)silanes R2Si{NH(2-Py)}2, which were isolated as pale yellow solids. Crystal structure analyses revealed that both compounds exhibit tetrahedrally coordinated silicon atoms which are linked to two 2-pyridylamido moieties and two organyl groups (Me or Ph). As a result of intermolecular hydrogen bonding between the NH groups and the pyridyl N atoms the R2Si{NH(2-Py)}2 molecules are catenated in the solid state. Treatment of R2Si{NH(2-Py)}2 with nBuLi afforded the corresponding amides R2Si{NLi(2-Py)}2, which were subsequently reacted with MCl2 (M = Sn, Pb) to give the dinuclear silylamides [{R2Si(N-2-Py)2M}2]. Both the tin and the lead derivatives exhibit closely related molecular structures, in which the tin (or lead) atoms are linked to two amido N atoms and a pyridyl N atom in a distorted trigonal bipyramidal coordination mode.
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