A dynamic combinatorial process has allowed the isolation of four new compounds produced in the direct solvothermal reactions of pyrimidine-2(1H)-thione (pymSH) or bis(2-pyrimidyl)disulfide (pym2S2) with nickel halides (chloride, bromide). The in situ cleavage of S–S, S–C(sp2) bonds generates the pyrimidinesulfide (pym2S) and pyrimidinetrisulfide (pym2S3) ligands and the formation of nickel complexes. In all cases, the in situ generated molecules behave as chelating terminal ligands, therefore no evidence of their potential bridging capability is available for Ni(II). The magnetic properties of the compounds indicate the presence of moderate antiferromagnetic interactions that become more intense as the number of bridging halides increases.
动态组合过程可以分离
嘧啶-2(1H)-
硫酮 (pymSH) 或双(2-
嘧啶基)二
硫化物 (pym2S2) 与卤化
镍(
氯化物、
溴化物)的直接溶剂热反应中产生的四种新化合物。 S-S、S-C(sp2) 键的原位裂解生成
嘧啶硫醚 (pym2S) 和
嘧啶三
硫醚 (pym2S3)
配体并形成
镍配合物。在所有情况下,原位生成的分子都表现为螯合末端
配体,因此没有证据表明它们对 Ni(II) 具有潜在的桥接能力。这些化合物的磁性表明存在适度的反
铁磁相互作用,随着桥接卤化物数量的增加,这种相互作用变得更加强烈。