A drive to understand the reactivity of hemi-labile organoselenide and telluride ligand systems has made this area of research increasingly popular. For this purpose, various metal systems have been applied. Among them, group 10 metal precursors have been exploited predominantly because the resulting complexes are important as catalytic, semiconductor and supercapacitor materials. The wide applicability of these compounds has driven us to explore the chemistry of N-heterocyclic-based ligand systems. Overall, this research deals with the reactivity of N-heterocyclic dichalcogenides Ar₂E₂ (Ar = C₅H₄N, C₅H₃(3-Me)N, C₄H₃N₂, C₄H(4,6-Me)N₂; E = Se, Te) and their sodium salts (generated by the reductive cleavage of E–E bonds through NaBH₄) towards group 10 metal phosphine precursors via oxidative addition and substitution routes. The oxidative addition reactions of [M(P-P)₂] (M = Pd, Pt) and substitution reactions of [MCl₂(P-P)] (M = Ni, Pd, Pt) with diorgano dichalcogenide and sodium salts of N-heterocyclic selenolate ligands afforded exclusively mononuclear compounds [M(SeAr)₂(P-P)] (M = Ni, Pd, Pt; Ar = C₅H₄N, C₅H₃(3-Me)N, C₄H₃N₂, C₄H(4,6-Me)N₂; P-P = dppe, dppp, dppf), however the pyrimidyl selenolate-derived mononuclear compounds transformed to trinuclear products after prolonged standing in chlorinated solvents. In contrast to the selenium analogues, all probable mono to tri nuclear complexes of tellurium were isolated depending upon the metal and phosphine, and the nature of the solvent. The isolation of various products depended on the comparable bond dissociation energies of the Te–Te and Te–C bonds. Among these, a ferrrocenyl auxiliary phosphine ligand-based mononuclear tellurolate compound [Pd(TeC₅H₄N)₂(dppf)] was used for H₂S gas sensor applications. The efficiency of a thin film of this compound was 75% with a sensitivity of down to 5 ppm at room temperature.

中文翻译：

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半不稳定的吡啶基和嘧啶基衍生的硫属元素配体对第10组金属膦前体的反应性

理解半不稳定的有机硒酸和碲化物配体系统反应性的驱动力使得该领域的研究越来越受欢迎。为此，已经应用了各种金属系统。其中，主要开发了10族金属前体，因为所得的络合物对于催化，半导体和超级电容器材料很重要。这些化合物的广泛适用性驱使我们探索基于N杂环的配体系统的化学性质。总体而言，这项研究涉及N杂环二卤化氢Ar ₂ E ₂（Ar = C ₅ H ₄ N，C ₅ H ₃（3-Me）N，C ₄ H ₃ N ₂C ₄ H（4,6-Me）N ₂；E = Se，Te）及其钠盐（通过NaBH ₄的E–E键的还原性裂解生成）通过氧化加成和取代途径与第10组金属膦前体形成。[M（PP）₂ ]（M = Pd，Pt）的氧化加成反应和[MCl ₂（PP）]（M = Ni，Pd，Pt）与二有机二卤化硅化物和N-杂环硒酸酯的钠盐的取代反应配体仅提供单核化合物[M（SeAr）₂（PP）]（M = Ni，Pd，Pt； Ar = C ₅ H ₄ N，C ₅ H ₃（3-Me）N，C ₄ H ₃N ₂，C ₄ H（4,6-Me）N ₂；PP = dppe，dppp，dppf），但是，在氯代溶剂中长时间放置后，衍生自亚硒酸嘧啶基的单核化合物转变为三核产物。与硒类似物相反，根据金属和磷化氢以及溶剂的性质，分离出了所有可能的碲单至三核配合物。各种产物的分离取决于Te-Te和Te-C键的可比键解离能。其中，将基于二茂铁基辅助膦配体的单核碲酸化合物[Pd（TeC ₅ H ₄ N）₂（dppf）]用于H _2。气体传感器的应用。该化合物的薄膜的效率为75％，在室温下灵敏度低至5 ppm。