Abstract
A functionalized ligand (L = 1,4,8,11-tetrakis(3-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane) was synthesized by the reaction of 1,4,8,11-tetraazacyclotetradecane (cyclam, L1) with 3-(chloromethyl)pyridine hydrochloride. Hydrothermal reactions between L and two Cd(II) salts (nitrate or chloride) led to the formation of [CdCl2(µ4-4(pyridyl)L)] n (1) and [Cd(µ-ONO2)2(µ4-4(pyridyl)L)] n (2), which were characterized by elemental analysis and single-crystal X-ray diffraction. In 1, Cd is six-coordinate, with a CdN4Cl2 octahedral coordination environment forming two metallamacrocycles with the functionalized cyclam. In the structure of 2, the metal possesses a distorted CdN4O2 octahedral coordination geometry, also presenting two metallamacrocycles. In both structures, the ligand does not chelate, but forms extended polymeric structures.
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