Novel Dinuclear Tin(II) and Lead(II) Compounds with 2‐Pyridyl Functionalized Silylamido Ligands

Treatment of R 2 SiCl 2 ( R = Me, Ph) with 2‐aminopyridine in the presence of NEt 3 led to the formation of the bis( N ‐2‐pyridylamino)silanes R 2 Si{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 R 2 Si{NH(2‐Py)} 2 molecules are catenated in the solid state. Treatment of R 2 Si{NH(2‐Py)} 2 with n BuLi afforded the corresponding amides R 2 Si{NLi(2‐Py)} 2 , which were subsequently reacted with M Cl 2 ( M = Sn, Pb) to give the dinuclear silylamides [{ R 2 Si( N ‐2‐Py) 2 M } 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.