STUDIES ON COORDINATION POLYMERS OBTAINED FROM 2,5-DIHYDROXY-p-BENZOQUINONE WITH COPPER, THORIUM AND ZIRCONIUM
Journal Article
·
· Indian Journal of Chemistry (India) Divided into Indian J. Chem., Sect. A and Indian J. Chem., Sect. B
OSTI ID:4712336
Conductometric studies on the copper and thorium complexes with 2,5- dihydroxy-p-benzoquinone indicate that these are coordination polymers, because their molar composition depends on whether the metal or the reagent is present in excess. In the complex formed in the presence of excess of the ligand, the ligand forms the chain ends, while in the case of the complex formed in the presence of excess of the metal, the metal forms the chain ends. Molar compositions of the copper complexes were found to be 1: 0.72 and 1: 1.25 and of the thorium complexes to be 1: 1.86 and 1:2.2. Infrared absorption spectrum of 2,5-dihydroxy-p-benzoquinone shows two absorption peaks at 1650 and 1620 cm/sup - 1/ due to chelated carbonyls and its zirconium complex indicates two absorption peaks at 1575 and 1550 cm/sup -1/ which may be attributed to carbonyls chelated to zirconium atoms. X-ray powder diffraction pattern of zirconium chelate with 2,5-dihydroxy-pbenzoquinone shows only two faint haloes indicating it to be a polymerized product. The zirconium complex is thermally unstable at 300 un. Concent 85% C. Zirconyl complex has the molar composition 1: 1 and it appears to be a long chain linear polymer. (auth)
- Research Organization:
- Univ. of Delhi
- NSA Number:
- NSA-17-023237
- OSTI ID:
- 4712336
- Journal Information:
- Indian Journal of Chemistry (India) Divided into Indian J. Chem., Sect. A and Indian J. Chem., Sect. B, Journal Name: Indian Journal of Chemistry (India) Divided into Indian J. Chem., Sect. A and Indian J. Chem., Sect. B Vol. Vol: 1; ISSN IJOCA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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