作者:Tapash Deb、Michael P. Jensen
DOI:10.1021/ic5018328
日期:2015.1.5
reactions of analogous and biomimetic zinc complexes, a pertinent mechanistic question is the nature of the reactive nucleophile, either an intact thiolate complex or a free arylthiolate resulting from a dissociative pre-equilibrium. The observed kinetics conformed to a second-order rate law, first order with respect to the complex and electrophile, and no intermediate complexes were observed. In the absence
动力学研究报道了拟四面体芳基硫醇镍(II)配合物[(Tp R,Me)Ni–SAr](Tp R,Me =氢三3-R-5-甲基-1-吡唑基}硼酸酯,R = Me,Ph和Ar = C 6 H 5,C 6 H 4 -4-Cl,C 6 H 4 -4-Me,C 6 H 4 -4-OMe,2,4,6-Me 3 C 6 H 2,2,4,6-我镨3 c ^ 6 ħ 2)与有机亲电试剂R'X(即MeI,EtI,BzBr)在低极性有机溶剂(甲苯,THF,氯仿,二氯甲烷或1,2-二氯乙烷)中产生假四面体卤化物络合物[(Tp R,Me[Ni-X](X = Cl,Br,I)和相应的有机硫化物R'SAr。还检查了与卤代溶剂和不定空气的竞争性反应。类似于类似的和仿生的锌络合物的反应,一个相关的力学问题是反应性亲核试剂的性质,即完整的硫醇盐络合物或由解离的预平衡产生的游离的芳基硫醇盐。观察到的动力学符合二阶速率定律,