在氢化发生反应中,铅烷发生反应最为特殊。必须在氧化剂存在下,Pb(11)才能够被NaBH_4还原生成铅烷。流行的解释是铅生成了亚稳态 Pb(1V)然后被还原为铅烷。陈恒武综述过铅烷发生反应的各种机理观点。本文报道采用氢化物流动注射发生原子吸收光谱实验系统,观测了 K_2Cr_2o_7乳酸及 K_3Fe(CN)_6两种氧化物反应体系中,反应物之间量的关系及其与铅烷产率的关系。从反应物摩尔关系推测,铅烷发生反应是由氧化剂与硼氢化钠之间的氧化还原反应所诱导的。 In the hydrogenation reaction, the reaction of lead is the most special. Pb (11) must be reduced to NaBH 4 to form lead alkane in the presence of an oxidant. The popular explanation is that lead forms metastable Pb (1V) which is then reduced to lead. Chen Hengwu reviewed lead mechanism reaction point of view. In this paper, we reported the relationship between the amount of reactants and the yield of lead in K 2 Cr 2 O 7 lactic acid and K 3 Fe (CN) 6 reaction systems by using the flow injection atomic absorption spectrometry system. It is inferred from the molar relationship of the reactants that the reaction of lead is induced by the redox reaction between the oxidant and sodium borohydride.