Synthesis and crystal structure of [Ru3Pt(µ-PPh2)(µ4-η2-CCBut)(CO)7(dppe)](dppe = Ph2PCH2CH2PPh2), a butterfly cluster containing an unusually bonded alkynyl ligand: a model for an intermediate molecular geometry in a cluster-ligand rearrangement

Abstract

Reaction of [Ru₃Pt(µ-H)(µ₄-η²-CCBu^t)(CO)₉(L₂)]la(L₂= dppe) with Ph₂PCCPPh₂ affords the butterfly cluster [Ru₃Pt(µ-PPh₂)(µ₄-η²-CCBu^t)(CO)₇(dppe)]3; the metal skeleton and µ₄-η² alkynyl coordination mode in 3 represent a likely model for a transition geometry in the interconversion of 1 and its vinylidene tautomer [Ru₃Pt{µ₄-η²-CC(H)Bu^t}(CO)₉(L₂)]2.