
%0 Journal Article
%A Tkaczuk, MN 
%A Lincoln, SF 
%T A phosphorus-31 magnetic resonance study of ligand exchange on tetrakis(hexamethylphosphoramide)zinc(II) ion
%J Australian Journal of Chemistry
%D 1980/12/01
%V 33
%N 12
%P 2621-2626
%K 
%R https://doi.org/10.1071/CH9802621
%U https://www.publish.csiro.au/paper/CH9802621 
%X The rate of the associative ligand exchange process on tetrakis (hexamethylphosphoramide)zinc(II) ion in CD2Cl2 solution, determined by 31P n.m.r. spectroscopy, is given by:                      rate = 4k2[O=P(Nme2)3][Zn(O=P(NMe2)3)42+] The characteristic kinetic parameters are: k2(240 K) 304±17 dm3 mol-1 s-1, &#916;H2&#8225; 22.7±0.9 kJ mol-1, and &#916;S2&#8225; -101±4 J K-1 mol-1.     The preparations of [Zn(O=P(NMe2)3)4](ClO4)2, [Zn(O=P(OMe)3)5] (ClO4)2 and [Zn {O=P(Me)-(OMe)2}5](ClO4)2 are reported. The rate of ligand exchange upon the last two species was found to be in the fast-exchange limit of the n.m.r. time scale. 
