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Abstract
The first boraphosphene, (tmp)B=P(Ar) (tmp = 2,2,6,6-tetramethylpiperidino; Ar = 2,4,6-t-Bu3C6H2) has been prepared by thermolysis of the corresponding dimer, [(tmp)BP(Ar)]2 at 250°C. Mass spectral data are reported for (tmp)B=P(Ar) and ab initio MO calculations have been performed on the parent boraphosphene, HB=PH. The nature of the phosphorus-phosphorus bond in ArP=PAr has been investigated by solid state 31P NMR. The reactivity of the phosphavinylidene, [Mo(CO)2(n1−P=C(SiMe3)2(n-C5H5)] has been explored. The reaction of ArPCl2 with Na2[(n-C5H5)-V(CO)3] affords [V2(CO)4(n-C5H5)2{μ-PAr}], the first example of a group 5 phosphinidene complex.