Naslov
N-o-tolyl-2-hydroxy-1-naphthaldimine and its Ni(II) complex. Conformational changes of free ligand by chelatation

Autori
Kaitner, Branko ; Meštrović, Ernest ; Pavlović, Gordana

Izvornik
Journal of chemical crystallography (1074-1542) 28 (1998), 1; 77-82

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

Ključne riječi
N-aryl naphthaldimines; conformational changes; keto-enol tautomerism; stepped conformation; X-ray molecular and crystal structure

Sažetak
The main scope of the paper deals with keto/amine-enol/imine tautomerism in the solid state of an N-aryl substituted naphthaldimine and conformational changes of this ligand after coordinating to the nickel atom. The N-o-tolyl-2-hydroxy-1-naphthaldimine (I) crystallizes in the orthorhombic space group P212121 with cell dimensions a = 7.8641(4), b = 12.712(1), c = 13.853(1) A and corresponding bis-bidentate nickel complex (II) in the monoclinic space group P21/c and unitcelldimensions a = 7.436(3), b = 22.050(5), c = 8.643(4) A, beta = 95.05(6)o. In the non-planar molecule of (I) the presence of the enol tautomer is found. In (II) the metal atom has the characteristic square-planar coordination with Ni(II) on crystallographically imposed inversion center. Two naphthaldimine moieties are not coplanar showing stepped conformation with step height 1.034 A.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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