
%0 Journal Article
%A Anh, VTP 
%A Graddon, DP 
%A Ng, VAK 
%T Thermodynamics of metal-ligand bond formation. XXXI. Reaction of Bis(diphenyldithiophosphinato)nickel(II) with heterocyclic bases
%J Australian Journal of Chemistry
%D 1978/11/01
%V 31
%N 11
%P 2417-2422
%K 
%R https://doi.org/10.1071/CH9782417
%U https://www.publish.csiro.au/paper/CH9782417 
%X The low-spin, planar complex (Ph2PS2),Ni reacts with heterocyclic bases to form (Ph2PS2)2NiB and (Ph2PS2)2NiB2 (B = pyridine or 4-methylpyridine). Average thermodynamic data for adduct formation in chlorobenzene at 30&#176;C are: with pyridine K1 500, K2 251. mol-1, &#916;H1° -34, &#916;H2° -44 kJ mol-1; with 4-methylpyridine K1 1000, K2 50, &#916;H1&#176; -35, &#916;H2&#176;-41. With 2- methyl-pyridine only the 1 : 1 adduct is formed, with K 13, &#916;H&#176; -34. In these systems the five-coordinate 1 : 1 adducts are unusually stable and are shown to have the high-spin configuration. 
