
%0 Journal Article
%A Khamar, MM 
%A Larkworthy, LF 
%A Patel, KC 
%A Phillips, DJ 
%A Beech, G 
%T Complexes of vanadium(II) with heterocyclic and aliphatic amines
%J Australian Journal of Chemistry
%D 1974/01/01
%V 27
%N 1
%P 41-51
%K 
%R https://doi.org/10.1071/CH9740041
%U https://www.publish.csiro.au/paper/CH9740041 
%X Complexes of vanadium(11) with a range of heterocyclic and aliphatic amines have been isolated, generally from ethanolic solution under nitrogen. With pyridine (py) and &#946;- and &#947;-picolines (&#946; pic and &#947; pic) complexes of the general formula V(amine)4X2, in which X = Cl, Br, or I, have been obtained. Their reflectance spectra are dominated by charge transfer bands, but some d-d transitions have been assigned. These complexes are magnetically dilute with magnetic moments near to 3.87 B.M. The only bis(amine) complexes isolated with these ligands are V(&#946; pic),Br, and V(&#947; pic)2Br2, and these show considerable antiferromagnetic interaction because of polymeric structures. The thermal behaviour of the complexes V(amine)4X2 resembles that of the corresponding nickel(11) complexes. No definite assignments of V-X stretching frequencies have been possible. With ethylenediamine (en), propane-1,2-diamine (&#945; pda), propane-1,3-diamine (&#946; pda) and diethylenetriamine (dien) the following magnetically dilute complexes have been isolated : [V(en)3] X2, [V(&#945;pda)3] X2, [V(&#946;pda)3] X2 and [V(dien)2] X2. These complexes with aliphatic chelates have electronic spectra typical of octahedral vanadium(11). The 8-aminoquinoline (amq) complexes, V(amq)2Cl2,- 2H20, V(amq)2Br2,2H2O and V(amq)3I2,2H20, have more complicated electronic spectra and are magnetically dilute as are some 1,l0-phenanthroline and 2,2'-bipyridyl complexes of general type [V(chelate)3] X2,nH2O. 
