especially polyiodides, have been discovered and studied, but definitive studies on polybromides remain scarce. Br3− is the only monovalent polybromide with a known structure. Higher-order monovalent polybromide anions have been proposed but not structurally confirmed as discrete species. In this study tetraalkylammonium polybromides with molecular formulas R4NBr2x+1 (R = ethyl; x = 1−4) were prepared by reacting
已经发现和研究了大量的多卤化物,特别是多
碘化物,但是关于多
溴化物的确定性研究仍然很少。BR 3 -是唯一的一价多
溴化物与已知的结构。已经提出了高阶单价多
溴化物阴离子,但在结构上未确认为离散物种。在这项研究中,分子式为R 4 NBr 2 x +1(R =乙基;x = 1-4)的四烷基多
溴化铵是通过使四烷基一
溴化铵或三
溴化铵盐与气相
溴反应制得的。从固体多
溴化物在100至400 cm -1的光谱范围内获得了不同的和特征性的拉曼光谱。将实验拉曼光谱与从头算计算进行比较,以提出这些聚
溴化物阴离子的结构。观察到实验和理论结果之间的一般协议。这项研究表明,拉曼光谱法是探测离散单价多
溴化物结构的灵敏技术。