Abstract
From the condensation reaction of (6-methylpyridin-2-yl)methanol and pyridine-2-carbaldehyde at 130 °C without catalyst or solvent was isolated an unexpected compound 1,2-bis(6-methylpyridin-2-yl)ethene-1,2-diol, in crystal form. The new compound was characterised by mass spectroscopy, IR, 1H NMR, UV-Vis and single crystal X-ray diffraction showing that it is a symmetrical molecule with two intramolecular hydrogen bonds. The molecular and crystalline structure of 1,2-bis(6-methylpyridin-2-yl)ethene-1,2-diol indicated that the molecule crystallised in a monoclinic crystal system and belongs to P21/c space group with two molecules per unit cell. Within the accuracy of the analysis the molecule is planar and there are two moderate intramolecular O–H⃛N hydrogen bonds. We think that the presence of two moderate intramolecular hydrogen bonds gives stabilisation to the crystal structure, making isolation of a single crystal form possible.