Formation of Alkanes by Aerobic Carbon–Carbon Bond Coupling Reactions Catalyzed by a Phosphovanadomolybdic Acid

The valorization
of alkanes is possible via carbon–carbon
coupling reactions. A series of dialkyl cobalt complexes [(RCH2)2CoIII(bpy)2]­ClO4 (R = H, Me, Et, and Ph) were reacted with the H5PV2Mo10O40 polyoxometalate as a catalyst,
leading to a selective oxidative carbon–carbon bond coupling
reaction. The reaction is initiated by electron transfer from [(RCH2)2CoIII(bpy)2]+ to H5PVV2Mo10O40 to yield an intermediate [(RCH2)2CoIV(bpy)2]2+–H5PVIVVVMo10O40, as identified by a combination
of EPR and X-ray photoelectron spectroscopy experiments. The reaction
is catalytic with O2 as terminal oxidant representing an
aerobic C–C bond coupling reaction.

烷烃的增值可通过碳-碳偶联反应实现。一系列二烷基钴配合物[(RCH2)2CoIII(bpy)2]ClO4（R = H, Me, Et, 和 Ph）与H5PV2Mo10O40多氧金属酸盐催化剂反应，导致选择性氧化碳-碳键偶联反应的发生。该反应通过电子从[(RCH2)2CoIII(bpy)2]+向H5PVV2Mo10O40转移而启动，生成中间体[(RCH2)2CoIV(bpy)2]2+-H5PVIVVVMo10O40，此中间体通过电子顺磁共振(EPR)和X射线光电子能谱实验得以鉴定。该反应具有催化活性，以O2作为终端氧化剂，代表着一种好氧的C-C键偶联反应。