The assistance of Dr. B.K. Hunter at Queen’s University;
Kingston;
B.G. Sayer at McMaster University;
Hamilton;
and Dr. C. Rodger at Bruker Spectrospin (Canada) Ltd. in the collection of the NMR spectra is gratefully acknowledged. Reviews of the manuscript by Dr. J.D. Halliday;
Dr;
E.A;
Symons;
A;
Celli;
and B.J.F. Palmer are also appreciated;