Structural Aspects of Compounds ContainingCE(EGe,Sn,Pb) Bonds

Abstract

Introduction Simple Tetravalent Species Unstrained Rings Containing Four‐Coordinate Isolated E Element( IV ) Species with Coordination Numbers Above Four Organo‐ E ( IV ) Compounds of Transition Metals Compounds Containing E  E OR E  E ′ Bonds: E = Ge , Sn or Pb ; E ′ = Si , Ge , Sn or Pb Divalent Species and Lower Valent Clusters Doubly Bonded Germanium, Tin and Lead

Theoretical investigation of the N → Sn coordination in (Me3SnCN)2

“…Aside from such synthetic applications, an interesting aspect of organotin(IV) compounds is their structural diversity. Organotin(IV) compounds often form structures in which previously tetravalent Sn atoms exhibit the coordination number greater than four, that is, the Sn atoms become hypervalent [1,8,9]. In such cases, the Sn atoms are involved in additional inter-and/or intramolecular interactions that expand their coordination number and, consequently, change their tetrahedral configuration.…”

“…The N atom of pyridine was involved in the formation of the N → Sn bond with Me 3 SnCl and the resulting structure was trigonal bipyramidal. In general, the change in coordination number from four to five is frequently observed for organotin(IV) molecules, especially for those containing four Sn-C bonds [8]. Then, the formation of the intermolecular N → Sn bond leads to the pentacoordinated Sn atom that usually adopts an approximately trigonal bipyramidal coordination geometry.…”