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A facile method for the synthesis of 2,3,3’,4’-biphenyltetracarboxylic dianhydride(a-BPDA) was reported,which comprises the steps of the dehalogenative coupling of dimethyl 4-chlorophthalate(4-DMCP) and dimethyl 3-chlorophthalate(3-DMCP) catalyzed by low-cost(Ph 3 P) 2 NiCl 2,the hydrolysis of tetra-ester and the dehydration of tetra-acid.In contrast to the conventional methods,this method has the advantage of low cost,convenient manipulation,available condition,high purity and good overall yield.Moreover,the single crystal structure of a-BPDA was analyzed by X-ray diffraction method.The X-ray data suggest that a-BPDA is a rigid,non-coplanar and non-linear structure.It contains three crystallographically independent molecules,in which the dihedral angles of the two linked phenyl rings are 44.75(4)°,46.37(3)° and 42.32(3)°,respectively.The title molecule is governed by a stronger intermolecular interaction in contrast to van der Waals interaction because of the special positions of anhydride groups.
A facile method for the synthesis of 2,3,3 ’, 4’-biphenyltetracarboxylic dianhydride (a-BPDA) was reported, which comprises the steps of the dehalogenative coupling of dimethyl 4- chlorophthalate (4-DMCP) (3-DMCP) catalyzed by low-cost (Ph 3 P) 2 NiCl 2, the hydrolysis of tetra-ester and the dehydration of tetra-acid. In contrast to the conventional methods, this method has the advantage of low cost, convenient manipulation, available condition, high purity and good overall yield. Moreover, the single crystal structure of a-BPDA was analyzed by X-ray diffraction method. The X-ray data suggest that a-BPDA is a rigid, non-coplanar and non- -linear structure. It contains three crystallographically independent molecules, in which the dihedral angles of the two linked phenyl rings are 44.75 (4) °, 46.37 (3) ° and 42.32 (3) °, respectively.The title molecule is governed by a stronger intermolecular interaction in contrast to van der Waals interaction because of the special positions of a nhydride groups.