THE PREPARATION, CHARACTERIZATION AND REACTION CHEMISTRY OF SMALL BRIDGING PHOSPHABORANE SYSTEMS PREPARED FROM THE REACTION OF [(2,2-DIMETHYL-1-(TRIMETHYLSILOXY)PROPYLIDENE)-TRIMETHYLSILYLPHOSPHINE] WITH PENTABORANE(9)

Robert W. Miller Department of Chemistry and the Center for Molecular Electronics, Center for Science and Technology, Syracuse University, Syracuse, New York, 13244-4100

Kelley J. Donaghy Department of Chemistry and the Center for Molecular Electronics, Center for Science and Technology, Syracuse University, Syracuse, New York, 13244-4100

James T. Spencer Department of Chemistry and the Center for Molecular Electronics, Center for Science and Technology, Syracuse University, Syracuse, New York, 13244-4100

Abstract

The reaction of ((2,2-dimethyl-1-(trimethylsiloxy)propylidene)-trimethylsilylphosphine], 1, with pentaborane(9) under mild conditions produced the bridged phosphinopentaborane cluster ((^tBu) (Me₃SiO)HCP(SiMe₃))B₅H₈, 2, in high yield. This phosphaborane reacts readily with water to quantitatively produce the corresponding P—H substituted cage compound ((^tBu)(Me₃SiO)HCP(H))B₅H₈, 3, via an electrophilic exopolyhedral substitution reaction at the phosphorus atom. All new compounds have been characterized by a variety of spectroscopic methods including ¹H, ¹³C, ¹¹B, ³¹P NMR, FT-IR and mass spectroscopic analysis.

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THE PREPARATION, CHARACTERIZATION AND REACTION CHEMISTRY OF SMALL BRIDGING PHOSPHABORANE SYSTEMS PREPARED FROM THE REACTION OF [(2,2-DIMETHYL-1-(TRIMETHYLSILOXY)PROPYLIDENE)-TRIMETHYLSILYLPHOSPHINE] WITH PENTABORANE(9)

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THE PREPARATION, CHARACTERIZATION AND REACTION CHEMISTRY OF SMALL BRIDGING PHOSPHABORANE SYSTEMS PREPARED FROM THE REACTION OF [(2,2-DIMETHYL-1-(TRIMETHYLSILOXY)PROPYLIDENE)-TRIMETHYLSILYLPHOSPHINE] WITH PENTABORANE(9)

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