Evidence for a Nitric Oxide Complex with Cupric Fluoride


ALTHOUGH it has been recognized for some time that nitric oxide and cupric chloride or bromide combine in non-aqueous solvents to form nitrosyl complexes1, the composition of these has only recently been determined2. The deep blue colour is due to the covalent CuX 2.NO (possibly solvated) : this compound dissociates into colourless ions : and this has been responsible for erroneous structures suggested for the complexes. Unsuccessful attempts have been made to prepare nitrosyl complexes in alcoholic solution from other cupric salts, including the fluoride3. Recently, a study of the variation of dissociation constant of the cupric chloride nitrosyls as a function of the dielectric constant of the alcohol has been made4 : some results are shown in Table 1.

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  1. 1

    Kohlschutter, V., and Kutscheroff, M., Ber., 37, 3044 (1904).

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  2. 2

    Fraser, R. T. M., and Dasent, W. E., J. Amer. Chem. Soc., 82, 348 (1960).

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    Manchot, W., Ber., 47, 1601 (1914).

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  4. 4

    Fraser, R. T. M., J. Inorg. Nuclear Chem. (in the press).

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FRASER, R. Evidence for a Nitric Oxide Complex with Cupric Fluoride. Nature 188, 738–739 (1960). https://doi.org/10.1038/188738a0

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