
%0 Journal Article
%A Podmore, LPSPW 
%T Studies of vanadium(III) aqua chloro complexes and some related compounds
%J Australian Journal of Chemistry
%D 1972/12/01
%V 25
%N 12
%P 2521-2534
%K 
%R https://doi.org/10.1071/CH9722521
%U https://www.publish.csiro.au/paper/CH9722521 
%X Preparative and structural studies on several series of vanadium(111) aqua chloro complexes and related compounds are reported. Results indicate that all compounds contain vanadium(111) in pseudo-octahedral coordination. Evidence is presented from electronic, infrared, and nuclear quadrupole resonance spectra, X-ray powder diffraction, and magnetic data. The compounds of empirical formulae VX3,6H2O (X = Cl, Br), RbVCl4,6H2O, and Cs2VX5,nH2O (X = Cl, n = 4; X = Br,n = 5) are all shown to contain the green trans-[V(OH2)4X2]+ ion. For compounds of formula AI2VCl5,H2O (A = Cs, Rb, K, NH4) prior methods of preparation are reexamined and a new method of preparation is given. Physical studies confirm that these compounds contain the red complex ion [V(OH2)Cl5I2-. The salts comprise structures of two types, one for A = Cs, the other for A = K, NH4, Rb; the latter salts are isostructural with K2FeCl5,H2O. The anhydrous compounds A12VCl5 (A = Cs, Rb) are also examined and the preparation of the rubidium salt is reported for the first time. For these compounds the magnetic results are interpreted in terms of a weak antiferromagnetic interaction in a proposed polymeric structure and this is supported by other evidence. Some data are reported for VBr3 and VI3. 
