Crystal and molecular structures of aquahalogenovanadium(III) complexes. Part II. X-Ray crystal structure of dicaesium trans-tetrakisaquadichlorovanadium(III) trichloride, and the isomorphous bromo-compound

Abstract

Crystals of (I). Cs₂trans-[VCl₂(H₂O)₄]Cl₃, are monoclinic, space group C2/m, with a= 17.745(8), b= 6.183(5), c= 7.019(5)Å, β= 106.4(5)°, and Z= 2. The structure was determined by Patterson and Fourier methods from visually estimated reflections and refined by full-matrix least squares to R 0.106. The hydrogen atoms were not located. Bond lengths within the complex cation are: V–Cl 2.361(2) and V–O 1.983(10)Å. For (II), the isostructural bromo-compound, a= 18.484(9), b= 6.423(5), c= 7.266(6)Å, β= 106.1(5)°, Z=2. With R 0.17, bond lengths are: V–Br 2.497(1), V–O 2.060(7)Å.