Form of the dihedral angle dependence of the spin-spin coupling constant JHNNH |
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Authors: | L M Kapkan A Yu Chervinskii T M Pekhtereva Yu I Smirnov A F Dmitruk |
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Institution: | (1) Institute for Physical, Organic, and Coal Chemistry of the Ukrainian Academy of Science, Donetsk |
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Abstract: | Cyclic hydrazides (derivatives of phtalhydrazide,pyrozolidone-3, indazolone, cyclic hydrazide camphoric acid) are studied by the NMR1H method. The size of the dihedral HNNH angle of several model compounds (pyrozolidone-3, cyclic hydrazide norcamphoric acid) are calculated by the MINDO/3 SSF MO LCAO method. It is shown that in the hydrazides with HNNH dihedral angle 0–70° the magnitude of the HNNH spin-spin interaction constant does not exceed 1 Hz. The form of its dependence on the dihedral angle is determined.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 3, pp. 363–366, 1989. |
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