Abstract
The synthesis and structural characterization of one-dimensional coordination/H-bonded polymers M(18-crown-6) [H{ONC(CN)C(O)C 6H 5} 2] (M=NH 4, Tl) is reported. The hydrogen oximate anion is formed by means of strong hydrogen bonding O-H-O between two nitroso groups, it possesses a centrosymmetric structure and bridges two macrocyclic fragments. In both the structures these fragments M(18-crown-6) adopt unusual geometry with the large cations being situated exactly in the center of the crown ether cavity.
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