Answers are grounded in this paper and cite their sources.
When the neutral Lewis base triphenylphosphine oxide reacts with (C 5 Me 5 )CaI(thf) 2 in THF, the halide is displaced from the calcium to generate the stable cation [(C 5 Me 5 )Ca(OPPh 3 ) 3 ] + . The latter exhibits a “piano stool” geometry and displays only modest air sensitivity.
No takes yet. Share an insight, caveat, or question.
Jayaratne et al. (2001) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: