One‐Dimensional Cd II Coordination Polymers: Solid Solutions with Ni II , Thermal Stabilities and Structures

Autor: Dejana Vujovic, Luigi R. Nassimbeni, Helgard G. Raubenheimer
Rok vydání: 2004
Předmět:
Zdroj: European Journal of Inorganic Chemistry. 2004:2943-2949
ISSN: 1099-0682
1434-1948
DOI: 10.1002/ejic.200300794
Popis: Reactions of Cd(NCS)2 with 2-, 3- and 4-aminobenzonitrile ligands (2ABN, 3ABN and 4ABN respectively) have produced one-dimensional chain polymers of the general formula [M(NCS)2(ABN)2]n with the metal centres linked by double NCS− bridges. The three cadmium polymers [Cd(NCS)2(3ABN)2]n (1), [Cd(NCS)2(2ABN)2]n (2) and [Cd(NCS)2(4ABN)2]n (3) all differ in their hydrogen-bonding patterns. In terms of ABN coordination, both 1 and 2 exhibit terminal amine coordination while in 3 the ABNs are coordinated through the cyano groups. Crystalline solid solutions of 1 of general formula [Cd1−xNix(NCS)2(3ABN)2]n, containing nickel and cadmium in varying proportions, have also been prepared in order to establish the influence of the metal ratio on the thermal stability and bonding parameters of the polymers. The coordination polymers are not good candidates for forming clathrates while their thermal stability (ranging between 147 and 244 °C) depends on the position of functional groups on the ABN ligands and on the Cd:Ni ratio in the solid solutions. The new polymers have been characterised by single crystal X-ray diffraction, X-ray powder diffraction, electron microscopy, infrared spectroscopy, thermogravimetry and differential scanning calorimetry. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
Databáze: OpenAIRE
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