Syntheses, structural and spectral studies of six-coordinate, [Ph2SnCl(acpm)], and seven-coordinate, [(Bu2Sn)-Bu-n(dapm)], diorganotin(IV) complexes with N,N,S-tridentate and S,N,N,N,S-pentadentate N-4-heterocyclic thiosemicarbazones

de Sousa, Gerimario F.;Manso, Luis Carlos C.;Lang, Ernesto S.;Gatto, Claudia C.;Mahieu, Bernard
(2007) Journal of Molecular Structure — Vol. 826, n° 2-3, p. 185-191 (2007)

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Authors
  • de Sousa, Gerimario F.
    Author
  • Manso, Luis Carlos C.
    Author
  • Lang, Ernesto S.
    Author
  • Gatto, Claudia C.
    Author
  • Mahieu, BernardUCLouvain
    Author
Abstract
The reaction of the N,N,S-tridentate ligand 2-acetylpyridine (N-4-morpholyl thiosernicarbazones), Hacpm, with Ph2SnCl2 leads to the formation of the six-coordinate complex [Ph2SnCl(acpm)] (1), whereas the reaction of the S,N,N,N,S-pentadentate ligand 2,6-diacetylpyridine bis(N-4-morpholyl thiosemicarbazone), H(2)dapm, with "BuSnCl2 leads to the formation of the seven-coordinate complex ["Bu2Sn(dapm)] (2). Both compounds were studied by microanalyses, IR, NMR (H-1, C-13, Sn-119) and Mossbauer spectroscopy to investigate their structural properties. The organotin(IV) complexes were also studied by single crystal X-ray diffraction and the structure determination revealed that the phenyl derivative crystallizes in the triclinic space group (P1) as discrete neutral molecules, with the tin(IV) ion in a distorted octahedral geometry with the acpm(1-) ligand in a meridional configuration and the phenyl groups in trans positions. X-ray analysis shows that the n-butyl complex crystallizes in the monoclinic space group (P2(1)/c) as discrete neutral complexes, with the tin(IV) ion in a distorted pentagonal bipyramidal geometry. A correlation between Mossbauer and X-ray data based on the point-charge model is discussed. (c) 2006 Elsevier B.V. All rights reserved.
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de Sousa, G. F., Manso, L. C. C., Lang, E. S., Gatto, C. C., & Mahieu, B. (2007). Syntheses, structural and spectral studies of six-coordinate, [Ph2SnCl(acpm)], and seven-coordinate, [(Bu2Sn)-Bu-n(dapm)], diorganotin(IV) complexes with N,N,S-tridentate and S,N,N,N,S-pentadentate N-4-heterocyclic thiosemicarbazones. Journal of Molecular Structure, 826(2-3), 185-191. https://doi.org/10.1016/j.molstruc.2006.04.046 (Original work published 2007)