A. P. Hagen

Department of Chemistry, University of Oklahoma, Norman, OK 73019.

P. J. Russo

Department of Chemistry, University of Oklahoma, Norman, OK 73019.

P. C. Angus

Department of Chemistry, The Queen's University of Belfast, Northern Ireland.

S. R. Stobart

Department of Chemistry, University of Victoria, P.O. Box 1700, Victoria, British Columbia, Canada V8W 2Y2

Alan G. MacDiarmid

Department of Chemistry University of Pennsylvania Philadelphia, Pennsylvania