Apparent Five-Coordinate Metal Complexes: Evidence for Trifunctional Bridge Bonding with the 3-Cyano-2,4-Pentanedionate Ligand in the Trichloro(3-Cyano-2,4-Pentanedionato) Complexes of Tin(IV) and Titanium(IV)

Abstract
Sir: We wish to report evidence for an oligomeric structure in trichloro(3-cyano-2,4-pentanedionato) titanium(IV), C13TiL, and trichloro(3-cyano-2,4-pentanedionato)tin(IV), C13SnL. Evidence is presented that oligomerization is accomplished by a novel bridging interaction involving the planar trifunctional 3-cyano-2,4-pentanedionate anion.