Remarkable ‘edge’ ligation of a triphosphacyclopentenyl ring system. Synthesis, crystal and molecular structure of [Ni(η5-P3C2But2 ){η2-P3C2But 2CH(SiMe3)2Me}]

Abstract

In the nickel(II) complex [Ni(η 5 -P 3 C 2 Bu t 2 )(η 2 -P 3 C 2 Bu t 2 CH(SiMe 3 ) 2 Me}] the triphosphacyclopentenyl ring P 3 C 2 Bu t 2 CH(SiMe 3 ) 2 Me is unexpectedly coordinated to the metal exclusively via the two adjacent saturated ring phosphorus atoms, rather than via the 2-phosphaallyl fragment.