Oxidative addition of phenylacetylene through C-H bond cleavage to form the MgII-dpp-bian complex: molecular structure of [Mg[dpp-bian(H)](C[triplebond]CPh)(thf)2] and its diphenylketone insertion product [Mg(dpp-bian)*-[OC(Ph2)C[triplebond]CPh](thf)].
