Naslov
Extensive Intramolecular and Intermolecular Interactions in Two Quaternary Salts of the Pyridoxal Oxime

Autori
Cetina, Mario ; Nagl, Ante ; Gašo-Sokač, Dajana ; Kovač, Spomenka ; Bušić, Valentina ; Saftić, Dijana

Izvornik
Journal of chemical crystallography (1074-1542) 42 (2012), 7; 752-758

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quaternary pyridinium salts; phenacyl bromides; pyridoxal oxime derivatives; X-ray diffraction; supramolecular assembling

Sažetak
Two derivatives of pyridoxal oxime (1) were prepared by quaternization of pyridoxal oxime with phenacyl bromide and 2-methoxyphenacyl bromide. The crystal structures of the 1-phenacyl-3-hydroxy-4-hydroxyiminomethyl-5-hydroxymethyl-2-methylpyridinium bromide (2) and novel 3-hydroxy-4-hydroxyiminomethyl-5-hydroxymethyl-2-methyl-1-(2’-methoxyphenacyl) pyridinium bromide (3) have been determined by X-ray diffraction method. The conformation of these two pyridoxal oxime phenacyl derivatives is locked by numerous intramolecular hydrogen bonds. The O-H•••Br, C-H•••Br and C-H•••O hydrogen bonds in 2 and 3 form complex three-dimensional network. Supramolecular structure of 3 also contains C−H•••Pi and Pi•••Pi interactions which link neighbouring cations.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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