Synthesis of Adducts Between Alkaline Earth Dodecatungstophosphates with DMF and EtOH and Determination of the Heats of Addition Reaction

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (10): 1193.

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Synthesis of Adducts Between Alkaline Earth Dodecatungstophosphates with DMF and EtOH and Determination of the Heats of Addition Reaction

WANG Ai-Min, ZHU Jing, GU Yi-Dong

Department of Chemistry, Fudan University, Shanghai, 200433

Received:1991-11-23 Revised:1992-03-15 Online:1992-10-24 Published:1992-10-24

Abstract

Abstract: Adducts,Ca_2/3(PW₁₂O₄₀)·9DMF·EtOH,Sr_2/3(PW₁₂O₄₀)·8DMF·EtOH and Ba_2/3(PW₁₂O₄₀)·9DMF were synthesized in non-aqueous solutions,Their compositions and Keggin structures were characterized by elemental analysis and IRspectrometry.The heats of addition reactions between calcium dodecatungstophosphate,strontium dodecatungstophosphate and barium dodecatungstophosphate with DMF and EtOH were respectively determined by solution calorimetry.The values were -207.4±2.3 kJ/mol,-197.1±5.4 kJ/mol and -270,9±2.4 kJ/mol at 30℃,respectively.

Key words: Adducts of dodecatungstophosphates, Synthesis, Heats of reactions

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WANG Ai-Min, ZHU Jing, GU Yi-Dong. Synthesis of Adducts Between Alkaline Earth Dodecatungstophosphates with DMF and EtOH and Determination of the Heats of Addition Reaction[J]. Chem. J. Chinese Universities, 1992, 13(10): 1193.

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Synthesis of Adducts Between Alkaline Earth Dodecatungstophosphates with DMF and EtOH and Determination of the Heats of Addition Reaction

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