de Sousa, Gerimario F.
Manso, Luis Carlos C.
Lang, Ernesto S.
Gatto, Claudia C.
Mahieu, Bernard
[UCL]
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.
Bibliographic reference |
de Sousa, Gerimario F. ; Manso, Luis Carlos C. ; Lang, Ernesto S. ; Gatto, Claudia C. ; Mahieu, Bernard. 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. In: Journal of Molecular Structure, Vol. 826, no. 2-3, p. 185-191 (2007) |
Permanent URL |
http://hdl.handle.net/2078.1/37782 |