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Issue 7, 1982
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Potassium fluoride–malonic acid, KF·CH2(CO2H)2: X-ray crystal structure determination and infrared spectrum reveals very short hydrogen bonds

Abstract

Crystals of the adduct KF·CH2(CO2H)2, grown from aqueous solution, are unstable with evolution of HF. They show a remarkable cleavage. An X-ray crystal structure determination reveals a polymeric crystal arrangement of alternate malonic acid molecules and fluoride ions. Five different malonic acid–fluoride chains can be distinguished within the unit cell and there is a range of hydrogen bond lengths with R(O ⋯ F)= 2.41–2.49(4)Å. In most of these bonds one proton appears nearer the fluoride so that in effect the chains are composed of alternate HF molecules and hydrogen malonate ions, [⋯ O2C–CH2–CO2H ⋯ F–H ⋯ O2C–CH2–CO2H ⋯ F–H ⋯]n.

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Article type: Paper
DOI: 10.1039/DT9820001179
Citation: J. Chem. Soc., Dalton Trans., 1982,0, 1179-1184
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    Potassium fluoride–malonic acid, KF·CH2(CO2H)2: X-ray crystal structure determination and infrared spectrum reveals very short hydrogen bonds

    J. Emsley, D. J. Jones and R. Kuroda, J. Chem. Soc., Dalton Trans., 1982, 0, 1179
    DOI: 10.1039/DT9820001179

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