facile syntheses of highly deuterated and tritiated LiBH 4 , NaBH 4 and KBH 4 were achieved by hydrogen isotope exchange with deuterium or tritium gas at elevated temperatures. The exchange products were characterized by boron, proton and deuterium or tritium NMR spectroscopy. The extent of isotope ( 2 H or 3 H) incorporation was calculated from the patterns of 11 B NMR spectra. Several samples of tritiated
高度
氘化和氚化的 LiBH 4 、NaBH 4 和 KBH 4 的简单易行的合成是通过在高温下与
氘或氚气进行氢同位素交换来实现的。交换产物通过
硼、质子和
氘或氚核磁共振光谱表征。同位素( 2 H 或 3 H)掺入的程度由 11 B NMR 谱图计算。几个氚化NaBH 4 样品用BF 3 -Et 2 O 处理以产生氚化
硼烷-THF 络合物,这是一种亲电还原剂。
硼氢化物试剂和
硼烷-THF 复合物在标记反应中的效用通过导致特定标记产物的示例性还原得到证实。还原产物中标记的程度和方向通过放射性 HPLC 分析、1 H、