861 (1921). phines. The present work extends deoxygenation by phosphines to aromatic dtroso derivatives. Triphenylphospbine oxide (11. R= Cab) is obtained in good yield from equimolar quantities of triphenylphosphine and o-dinitrosobenzene in a hydrocarbon solvent. Benzofurazan (I), presumably formed Simultsneously, waa not isolated; however, after StSam distillation of a similar reaction mix-ture in ethanol both products are isolated ...