Synthesis and structure of associated μ-phosphinodiborane and of derivatives substituted on phosphorus

Article abstract of DOI:10.1007/BF00912968

Associated μ-phosphinodiborane, (μ-H₂PB₂H₅)_n, is formed in the reaction of H₂P(BH₃)₂Na with HCl in diethyl ether solution at -96°C. The formation of B-H-B bridges is demonstrated by IR and¹¹B-NMR spectra. (μ-H₂PB₂H₅)_n decomposes thermally to diborane and polymeric phosphinoborane analogous to μ-H₂NB₂H₅. Other phosphorus substituted μ-phosphinodiboranes associated via B-H-B bridges are formed in the reaction of the salts (CH₃)PH(BH₃)₂Li, (CH₃)₂P(BH₃)₂Li, and PhPH(BH₃)₂Li with HCl.