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Journal of Structural Chemistry

2014 year, number 3


P. A. Stabnikov, O. S. Koshcheeva, N. V. Pervukhina, G. I. Zharkova
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: nickel(II) bis-chelate, crystal structure, volatility


A new volatile complex Ni(mi-aa)2 [mi-aa = CH3C(NCH3)CHC(O)CH3)] is synthesized and its crystal structure is determined (APEX DUO diffractometer with a 4C CCD detector, lMo K a, graphite monochromator, T = 100 K). Crystallographic data for Ni(mi-aa) 2 are as follows: space group Pbca , a = 5.4058(3) Å, b = 11.8684(6) Å, c = 19.8472(10) Å, V = 1273.4(1) Å3, Z = 4. The Ni(II) atom is coordinated by the O and N atoms of two ligands. The Ni-O and Ni-N distances are 1.8390(9) Å and 1.926(1) Å; the chelate ONiN angle is 92.52(4)°. The complex has the molecular structure formed from the isolated molecules of Ni(mi-aa)2 bound by van der Waals interactions. For some complexes, the TG study is performed and the intermolecular interaction energy in the crystals is calculated.