Ray and other Techniques for Structural Characterization in the Solid State

X-Ray and other Techniques for Structural Characterization in the Solid State 

Ligands with other substituents in position 2 of the pyrimidine or the triazine rings have been designed to orientate these functions towards the inside of the open void created in the grids, with the aim of favoring their interactions with the hosted anions. 

For complexes 27 and 29, which contain the bpz dpz ligand, structural architectures that differ markedly from those of the previous complexes were found. The spatial disposition of the two pairs of chelating nitrogen atoms in the pyridazine derivative ligand causes the [Cu4L4 moieties to have, firstly, much shorter intramolecular Cu-Cu distances (ca. 3.6 A, see Table 3.1) and, secondly, also favors a nearly parallel alignment of opposite ligands L. As a result of these two features, the 

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