55669-45-9Relevant academic research and scientific papers
Reaction of tetraborane(10) with trimethylphosphine in tetrahydrofuran
Shimoi, Mamoru,Kodama, Goji
, p. 3300 - 3304 (2008/10/08)
When tetraborane(10) was treated with trimethylphosphine in a 1:1 molar ratio in tetrahydrofuran at -90 to -70°C, (CH3)3P·BH3, THF·B3H7, and H2B(THF)2+B3H8 - were produced. The formation of (CH3)3P·B3H7 was minimal. The same reaction was performed in dimethyl ether, diethyl ether, and dichloromethane, and the patterns of product distribution were compared with each other. The previously proposed mechanism for the B4H10 cleavage reactions was used to explain the observed results by taking the effects of concentrations and strength of the reacting bases into consideration. This mechanistic model explained also the results of the reactions of B4H10 with trimethylamine and phosphine in tetrahydrofuran. The values of 4 ± 1 and 0.41 ± 0.02 were obtained as the equilibrium constants for (CH3)3P·BH3 + THF·B3H7 ? THF·BH3 + (CH3)3P·B3H7 at 25°C and H3P·BH3 + THF·B3H7 ? THF·BH3 + H3P·B3H7 at 0°C, respectively.
