Crystal structure of a binuclear vanadium(III) complex with a new tripodal ligand, [V 2Cl 4(tped)(EtOH) 2]·2EtOH

Abstract

The reaction of VCl 3(thf) 3 (thf=tetrahydrofuran) with bis(2-pyridyl) ketone (pyke) gives a binuclear vanadium(III) complex, [V 2Cl 4(tped)(EtOH) 2]·2EtOH (tped=tetrapyridyl-1,2-ethanediol), having a new type of tripodal ligand, which comes from the reductive coupling of the pyke. This is the first dinuclear vanadium(III) complex that contains both ionic and neutral alcohol oxygen. The complex crystallizes in monoclinic space group P2 1/ c, with a=11.420(4), b=10.978(2), c=14.826(3) Å,β=103.53(2)°, V=1807.1(8) Å 3, Z=2, D calc=1.463 g cm −3, μ(Cu Kα)=77.16 cm −1, F(000)=820.00, R=0.040, R w=0.060, T=296(1) K for 1998 observed reflections.