194876-38-5

Upstream product

• 82265-64-3 syn-[5,6-dimethyl-2,3-bis(methoxycarbonyl)-7-phenyl-7-phosphanorbornadiene]pentacarbonyltungsten 
• 598-25-4 Dimethylallene 

Downstream Products

• 945656-11-1 [(C₄H₂P(C(CH₃)2)(CO₂CH₃)2C₆H₅)W(CO)5] 

Relevant academic research and scientific papers

2-Alkylidenephosphiranes

Three stable alkylidenephosphiranes have been synthesized from the addition of the terminal phosphinidene complex Ph-P-W(CO)5 to allene, 1,1-dimethylallene, and tetramethylallene. Isopropylidenephosphirane 16b was characterized by a single-crystal X-ray structure determination. Demetalation of its W(CO)5 group provides the uncomplexed compound. The addition reaction with tetramethylallene also yields vinylphosphirane epimers, which rearrange to phospholene 20. Ab initio MP2/6-31G* structures and energies are presented for the parent uncomplexed methylenephosphirane and its dimethyl derivatives.