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The green synthesis of chloropropylene carbonate via the coupling reaction of carbon dioxide and epichlorohydrin had been achieved using halogen-free and single-component catalysts tetrabutylammonium salts of tritransition-metal-substituted A-α-tungstogermanate [(n-C_4H_9)_4N]_3H_7GeW_9M_3(H_2O)_3O_(37)(M = Cu~Ⅱ,Ni~Ⅱ,Co~Ⅱand Mn~Ⅱ) without any solvent.The catalytic activity was significantly depended on the transition metal introduced in polyoxometalates.[(n-C_4H_9)_4N]_3H_7GeW_9Mn_3(H_2O)_3O_(37) exhibited the highest catalytic activity with 94.9%conversion for epichlorohydrin and 98%selectivity for chloropropylene carbonate in 3 h.Plausible mechanism was proposed based on the results.
The green synthesis of chloropropylene carbonate via the coupling reaction of carbon dioxide and epichlorohydrin had been achieved using halogen-free and single-component catalysts tetrabutylammonium salts of tritransition-metal-substituted A-α-tungstogermanate [(nC_4H_9) _4N] _3H_7GeW_9M_3 (M = Cu ~ Ⅱ, Ni ~ Ⅱ, Co ~ Ⅱand Mn ~ Ⅱ) without any solvent, the catalytic activity was significantly depended on the transition metal introduced in polyoxometalates. [(N-C_4H_9) _4N] _3H_7GeW_9Mn_3 (H_2O) _3O_ (37) exhibits the highest catalytic activity with 94.9% conversion for epichlorohydrin and 98% selectivity for chloropropylene carbonate in 3 h.Plausible mechanism was proposed based on the results.