C-Br Bond Activation of Bromoalkanes with Gallanediyl LGa

Monovalent group 13 diyls are promising reagents for C-X bond activation. We here report on C-Br bond activation reactions of gallanediyl LGa (L=HC[C(Me)NAr)](2), Ar=2,6-i-Pr2C6H3)) with a variety of bromoalkanes. Reactions with alkylbromides R-Br gave the corresponding LGa(Br)R (R=Et 1, n-Pr 2, i-Pr 3), while the reaction with dibromomethane in 2 : 1 molar ratio occurred with geminal C-Br bond addition and formation of [LGa(Br)](2)CH2 (4). In contrast, equimolar reaction of LGa with CHBr3 yielded LGa(Br)CHBr2 (5), which reacted with another equiv. of LGa with decomposition and formation of LGaBr2. Compounds 1-5 were characterized by heteronuclear (H-1, C-13) NMR and IR spectroscopy, as well as single-crystal X-ray diffraction (sc-XRD).

Automated summary

In this study, the researchers reported on the reaction between a new compound LGa and bromoalkanes, which can achieve C-Br bond activation. Different products can be obtained by changing the molar ratio of reactants. The products were characterized by NMR, IR, and X-ray diffraction.