New Heptacoordinated Organotin(IV) Complexes Derivatives of 2,6-diacetylpyridinebis(2-furanoylhydrazone), H2dapf, and 2,6-diacetylpyridinebis(2-thenoylhydrazone), H2dapt: Crystal and Molecular Structure of [Me2Sn(Hdapt]Br.H2O

The reaction of the ligands H2dapf and H2dapt, with R4-mSnXm (m = 2, 3; R = Me, Ph and X = Cl, Br) led to the formation of eight new heptacoordinated organotin(IV) complexes, which were studied by microanalysis, IR, NMR and Mössbauer spectroscopy to investigate their structural properties. The methyl derivative [Me2Sn(Hdapt)]Br.H2O was also studied by single crystal X-ray diffraction. It crystallizes in the monoclinic system, space group P2(1)/c, with a = 21.920(3), b = 7.4470(5), c = 16.805(2) Å, beta = 110.18(1)º, Z = 4. The structure determination revealed a monocationic complex of Sn(IV) in a distorted bipyramidal geometry [Me2Sn(Hdapf)]+, with Br- as counter ion and one molecule of water helping the crystal packing. Mössbauer parameters of the complex [Me2Sn(Hdapf)]2[Me2SnCl4] have evidenced two Sn(IV) sites, as observed in the crystal structure determination. Also a correlation between Mössbauer and X-ray data based on the point-charge model is discussed.

Bibliographic Details

Main Authors:	Sousa,Gerimário F. de, Mangas,Maria B.P., Francisco,Regina H.P., Gambardella,Maria T. do P., Rodrigues,Ana M.G.D., Abras,Anuar
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 1999
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000300011
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