Boron and phosphorus chemistry. Part I. Simple, high-yield syntheses of pure chlorodiorganoboranes

Abstract

The reaction of R₂BNH₂(R = Buⁿ or Prⁿ) with phosphorus pentachloride and with hydrogen chloride gave chlorodiorganoboranes in high yields. Diethylaminodi-n-butylborane and phosphorus pentachloride produced chlorodi-n-butylborane. Separate experiments demonstrated that reaction of trialkylboranes to form R¹₂BSR² and then R¹₂BNH₂ followed by reaction with phosphorus pentachloride or hydrogen chloride produced R¹₂BCl without the necessity for isolation of intermediates.