Abstract
Generating the transient electrophilic tungsten pentacarbonyl-phenylphosphinidene complex PhPW(CO)5 in the presence of 2,7-dimethylocta-2,3,5,6-tetraene leads to the formation of a 3,4-disubstituted phosphole or a complexed phospholene, depending on the reaction conditions. The formation of the phospholene results from the reaction of PhPW(CO)5 with the diallene, while the formation of the phosphole
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