Reduktion eines Bis(chlorphenylphosphanyl)methylids zum entsprechenden Diphosphan und Tetraphosphinan Reduction of a Bis(chlorophenylphosphanyl)methylide to the Corresponding Diphosphane and Tetraphosphinane
Reduktion eines Bis(chlorphenylphosphanyl)methylids zum entsprechenden Diphosphan und Tetraphosphinan Reduction of a Bis(chlorophenylphosphanyl)methylide to the Corresponding Diphosphane and Tetraphosphinane
Tetrachloro- and tetrabromodiphosphanyitriphenylphosphonium ylides give an equilibrium mixture of all possible halogen-exchange products. Their strongly varying coupling constants J(Ph(3)P-C-P) are explained as resulting from varying shares of two conformations. The chemical shifts delta(31)P of the phosphanyl groups seem to reflect their competition for the electron transfer from the ylide carbon atom. Related examples are included for comparison.