Gallium Coordination Polymers Based on Bis-pyridylethylene Containing Neutral and Cationic 1D Chains and 2D Networks

Two new coordination polymers constituted by gallium trichloride and 1,2-bis(4-pyridyl)ethylene (bpe) were synthesized. Reactions by the solvent-free melt-synthesis approach lead to the unusual formation of multiple cationic coordination polymers containing one-dimensional chains (1)(infinity)[GaCl2(bpe)(3)](+) and two-dimensional networks (2)(infinity)[Ga2Cl4(bpe)(5)](2+) in one compound of the formula (2)(infinity)[Ga2Cl4(bpe)(5)](1)(infinity)[GaCl2(bpe)(3)](2)[GaCl4](4)center dot 3bpe. Reactions under solvothermal conditions in benzene lead to the formation of a neutral one-dimensional coordination polymer (1)(infinity)[GaCl3(bpe)]. Both coordination polymers were characterized by SCXRD, PXRD, simultaneous DTA/TG, elemental analysis, and IR spectroscopy.