1:1 ADDUCTS OF TRIPHENYLTIN CHLORIDE WITH OXOVANADIUM(IV) TETRADENTATE SCHIFF-BASE COMPLEXES

Abstract Triphenyltin chloride– N , N ′-ethylenebis(salicylideneiminato)oxovanadium(IV) (1/1), which crystallises from acetonitrile with half a molecule of the solvent, is a heterodinuclear entity that displays an almost linear tin–oxygen–vanadium unit [SnOV=172.7(2)°; SnO=2.382(2), VO=1.614(3) A]. The tin atom shows approximately trigonal bipyramidal coordination in the adduct with the axial sites occupied by the O and Cl atoms. On the other hand, the vanadium atom is in square-pyramidal coordination, and the vanadium-containing moiety is 68% displaced along the Berry pseudorotation pathway from trigonal bipyramidal towards square pyramidal, compared with the 83% mean displacement for [VO(salen)] itself. The corresponding displacements for the vanadium moiety in Ph 3 SnCl·VO(hap-1,2-pn)·2CH 3 CN are 94% [SnO=2.405(6), VO=1.627(6) A; SnOV=175.5(3)°] and 89% in Ph 3 SnCl·VO[salen(3-OMe) 2 ]·CH 3 CN [SnO=2.428(2), VO=1.625(2) A; SnOV=167.5(1)°] [H 2 hap-1,2-pn= N , N ′-methylmethylenebis(2-phenolatoacetophenoneimine); H 2 salen(3-OMe) 2 = N , N ′-ethylenebis(3-methoxysalicylideneimine)]. The [VO(salen)] adduct of N -triphenylstannyl-1,2-benzisothiazol-3(2 H )-one 1,1-dioxide has also been synthesised, and characterised by spectroscopic measurements.