267240-48-2Relevant academic research and scientific papers
The first free 7λ3-phosphanorbornadiene
Van Eis, Maurice J.,Zappey, Herman,De Kanter, Franciscus J. J.,De Wolf, Willem H.,Lammertsma, Koop,Bickelhaupt, Friedrich
, p. 3386 - 3390 (2007/10/03)
The first uncoordinated 7λ3-phosphanorbornadiene 10 is reported. This missing member of the class of 7-heteranorbornadienes was prepared by decomplexation of its pentacarbonyltungsten complex 6 with iodine and N-methylimidazole. It is moderately stable at room temperature toward loss of the phosphinidene bridge (PhP:) because the aromatic fragment, [5]metacyclophane (5), is a highly strained compound. For this reason, 10 may be considered to be a hyperstable compound. An analysis of the energetics of the system by density functional calculations supports this rationalization.
