Bonding studies of compounds of boron and the Group 3–5 elements. Part XIV. Redistribution equilibria in phenylboron dihalide and boron trihalide systems
作者:S. S. Krishnamurthy、Michael F. Lappert、J. Brian Pedley
DOI:10.1039/dt9750001214
日期:——
reactions for two sets of trigonal boron systems, (i) PhBX2–PhBY2 and (ii)PhBX2–BY3, have been investigated, principally by 11B n.m.r. spectroscopy for samples in sealed tubes. For (i) when X = F and Y = Cl or Br, equilibrium constants at 316·5 K have been obtained, and small ΔH⊖ values and close to statistical ΔS⊖ for the former have been derived from second-law plots. For (ii), PhBF2 and BCl3 or BBr3 give
已经研究了两组三角硼体系(i)PhBX 2 –PhBY 2和(ii)PhBX 2 –BY 3的再分布反应,主要是通过11 B nmr光谱法对密封管中的样品进行了研究。为(我),当已获得X = F和Y = Cl或Br,·5 K.平衡常数在316,和小Δ ħ ⊖值和接近统计学Δ小号⊖为前已经从第二定律曲线衍生。对于(ii),PhBF 2和BCl 3或BBr 3在316·5 K时定量转化为PhBCl 2或PhBBr 2和BF 3。从这些和文献数据中,得出与(i)和(ii)有关的各种体系的标准反应热。