Studies of Equilibria, Shift Reagents, and Solvent Effects

Studies of Equilibria, Shift Reagents, and Solvent Effects.—Several studies of halogen-exchange equilibria have been reported, e.g. the exchange between phosphoryl, phosphonyl, and phosphinyl halides, P and P halides (27) 

Shift reagents have been used to study the stereochemistry of the cyclic phosphites (36) and (37). In the latter case it was concluded that the 

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