Synthesis of vinyl dinuclear cobalt(III) complexes through the insertion reactions of acyl(hydrido)cobalt(III) complexes with Alkynes，丁俊，佘蕾，The insertion reactions of hydrido acyl cobalt(III) complexes with alkynes, 1,4-(刱儃C6H4儃刱) and 4,4ˇ-(刱儃C6H4儃C6