| Autor: |
Chuev, I. I., Nikonova, L. A., Atovmyan, E. G., Utenyshev, A. N., Aldoshin, S. M. |
| Předmět: |
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| Zdroj: |
Crystallography Reports; May2001, Vol. 46 Issue 3, p394, 4p |
| Abstrakt: |
Crystals of (N′-furfurylidene)isonicotinoylhydrazide (I), which have been isolated from a watermethanol solution of hydrochloric acid (Ia) and an aqueous solution (∼50%) of acetic acid (Ib), are studied by X-ray diffraction. In Ia, the nitrogen atom of the pyridine ring is protonated. In the crystal, the intermolecular C=O...HN(Py) hydrogen bonds link the I u H[sup +] cations into chains which are bound through centrosymmetric NH... W...C1... W...H′N′ bridges. In molecule Ib, no protonation occurs; however, its pyridine N atom is blocked by the hydroxyl H atom of a solvate molecule of acetic acid. Crystals Ib have a layered structure. The crystallization water molecule is involved in the formation of three intermolecular hydrogen bonds, namely, those with the H atom of the amide group and the carbonyl O atoms of molecule I and an acetic acid molecule of the neighboring layer. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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