spectra. The IR spectrum of the vapor at low pressure implies the presence of only one species, viz. H(2)Ga(mu-H)(2)BH(2), with a diborane-like structure conforming to C(2v) symmetry. The structure of this molecule has been determined by gas-phase electron diffraction (GED) measurements afforced by the results of ab initio molecular orbital calculations. Hence the principal distances (r(alpha) in A) and
Gallaborane(GaBH(6),1),由LiBH(4)与[H(2)GaCl] [n]的复分解反应合成,约在。250 K通过
化学分析,IR和(1)H和(11)B NMR光谱进行了表征。低压下蒸气的红外光谱表明仅存在一种物质,即。H(2)Ga(mu-H)(2)BH(2),具有符合C(2v)对称性的乙
硼烷样结构。该分子的结构已通过气相电子衍射(GED)测量确定,该测量受从头计算分子轨道的结果增强。因此,主要距离(A中的rα)和角度(度中的α角)如下:r(Ga.B),2.197(3);r(Ga-H(t)),1.555(6); r(Ga-H(b)),1.800(6); r(BH(t)),1.189(7); r(BH(b)),1.286(7); 角度H(b)-Ga-H(b),71.6(4); 和angleH(b)-BH(b),110.0(5)(t =终端,b =桥接)。分子的聚集发生在凝聚相中。在110