Coordinating ability in DMSO-water 80:20 wt/wt of the Schiff base N,N'-3,4-toluenebis(salicylideneimine) with divalent cations. Crystal structure of the nickel(II) complex
(1997) Inorganica Chimica Acta — Vol. 256, n° 2, p. 319-325 (1997)
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- Potentiometric studies of the Schiff base ligand sal-3,4-toluen (N,N'-3,4-toluenebis(salicylideneimine)) with Ni(II), Co(II), Zn(II), Cd(II), Mg(II) and Ca(II) have been carried out in DMSO-water (80:20 wt./wt.) at 25 degrees C and 0.5 mol dm(-3) in NaClO4. For all the studied systems the monomer species [ML] and [MHL](+) are found to be formed and their stability constants have been determined. This study in solution led us to establish the best conditions for the preparation of the solid complex Ni(sal-3,4-toluen). 1.5CHCl(3). The molecular structure of this complex has been determined by single-crystal X-ray analysis. The compound crystallises in the triclinic system, space group <P(1)over bar>, with a=13.855(3), b=14.591(3), c=15.247(4) Angstrom, alpha=116.24(2), beta=115.97(2), gamma=91.30(2)degrees and Z=4. Refinement of the atomic parameters by least-squares gave a final R1 factor of 0.063 (wR2=0.1820) for 4017 unique reflections having I greater than or equal to 2 sigma(I). The coordination geometry around the nickel atom is square planar with a cis-N2O2 donor set. Spectroscopical studies for this complex were also carried out.
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HernandezMolina, R., Mederos, A., Gili, P., Dominguez, S., Nunez, P., Germain, G., & Debaerdemaeker, T. (1997). Coordinating ability in DMSO-water 80:20 wt/wt of the Schiff base N,N’-3,4-toluenebis(salicylideneimine) with divalent cations. Crystal structure of the nickel(II) complex. Inorganica Chimica Acta, 256(2), 319-325. https://doi.org/10.1016/S0020-1693(96)05440-0 (Original work published 1997)