Reactivity of E$_4$ (E$_4$ =P$_4$ , As$_4$ , AsP$_3$) towards Low‐Valent Al(I) and Ga(I) Compounds

The reactivity of yellow arsenic and the interpnictogen compound AsP$_3$ towards low-valent group 13 compounds was investigated. The reactions of [LAl] (1, L=[{N(C$_6$H$_3$$^i$Pr$_2$-2,6)C(Me)}$_2$CH]−) with As$_4$ and AsP$_3$ lead to [(LAl)$_2$(μ,η$^{1:1:1:1}$-E$_4$)] (E$_4$=As$_4$ (3 b), AsP$_3$ (3 c)) by insertion of two fragments [LAl] into two of the six E−E edges of the E$_4$ tetrahedra. Furthermore, the reaction of [LGa] (2) with E$_4$ afforded [LGa(η$^{1:1}$-E$_4$)] (E$_4$=As$_4$ (4 b), AsP$_3$ (4 c)). In these compounds, only one E−E bond of the E$_4$ tetrahedra was cleaved. These compounds represent the first examples of the conversion of yellow arsenic and AsP$_3$, respectively, with group 13 compounds. Furthermore, the reactivity of the gallium complexes towards unsaturated transition metal units or polypnictogen (E$_n$) ligand complexes was investigated. This leads to the heterobimetallic compounds [(LGa)(μ,η$^{2:1:1}$-P$_4$)(LNi)] (5 a), [(Cp’’’Co)(μ,η$^{4:1:1}$-E$_4$)(LGa)] (E=P (6 a), As (6 b), Cp’’’=η$^5$-C$_5$H$_2$$^t$Bu$_3$) and [(Cp’’’Ni)(η$^{3:1:1}$-E$_3$)(LGa)] (E=P (7 a), As (7 b)), which combine two different ligand systems in one complex (nacnac and Cp) as well as two different types of metals (main group and transition metals). ... mehrThe products were characterized by crystallographic and spectroscopic methods.