119Sn-Mössbauer spectroscopic studies on organoheterobimetallic half sandwich ruthenium–tin containing derivatives |
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| Authors: | Moura Edmilson M Terra Vilma R Siebald Helmuth G L de Lima Geraldo M Paim Lilian A Dias Fabrícia M |
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| Institution: | (1) Universidade de Alfenas, Campus de Varginha, MG, Brazil;(2) Universidade de Uberaba, MG, Brazil;(3) Lab. de Química de Coordenação e Organometálica do Estanho, Depto. de Química, ICEx, UFMG, Belo Horizonte – MG, 31270-901, Brazil |
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| Abstract: | A series of heterobimetallic complexes containing Ru–Sn bonds, of general formula RuCp(L)2SnX2Y] L = PPh3, 1/2 dppe = 1,2-bis(diphenylphosphino)ethane; X, Y = F, Cl and Br], was prepared and studied by elemental analysis, 119Sn-Mössbauer spectroscopy, i.r. and 1H-, 13C-, 19F-, 31P- and 119Sn-n.m.r. spectroscopy. 119Sn-Mössbauer studies allowed determination of the coordination number of the SnII center as well as the group electronegativity of the organometallic fragment RuCp(L)2]+. These results, supported by multinuclear n.m.r. data suggested that the electronic charge distribution between the RuII and SnII centers are strongly dependant upon the nature of L and the electronegativity of X and Y. |
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