Philippe Trens - Department of Chemistry, University of Reading, Box 224, Whiteknights, Reading, Berkshire, RG6 6AD U.K
John W. Peckett - Department of Chemistry, University of Reading, Box 224, Whiteknights, Reading, Berkshire, RG6 6AD U.K
Michael J. Hudson - Department of Chemistry, University of Reading, Box 224, Whiteknights, Reading, Berkshire, RG6 6AD U.K