1,2-, 1,3- and 1,4-benzenedicarboxylates of Cd and Zn of different dimensionalities: Process of formation of the three-dimensional structure

A systematic study of the benzenedicarboxylates (BDCs) formed by cadmium and zinc with the three isomeric dicarboxylic acids in the presence or absence of amines has been carried out. Several BDCs have been prepared under hydrothermal conditions and their structures established by X-ray crystallography. It is pointed out that the formation of the three-dimensional structures is most favored in the case of 1,4-benzenedicarboxylic acid. An example of a Zn 1,4-BDC where the three-dimensional structure is formed favorably with the increase in reaction temperature is discussed. A one-dimensional chain structure is shown to transform to a three-dimensional structure as a function of time at an appropriate temperature.