Formation of the 7-triphenylphosphonio-norbornen-7-ylium dication: a non-classical dication

Pieter Schipper, Wim A. M. Castenmiller, Jan W. de Haan, Henk M. Buck
1973 Journal of the Chemical Society Chemical Communications  
doi:10.1039/c39730000574 fatcat:lqavur2a2ncydiqvcfrljl72o4