Resumen

SOUSA, Gerimário F. de; ELLENA, Javier; MALTA, Valéria R. S.  y  ARDISSON, José D.. Different coordination modes for disulfoxides towards diorganotin(IV) dichlorides. X-ray crystal structures of 1,2-cis-bis-(phenylsulfinyl)ethene (rac-,cis-cbpse) and adducts [{Ph₂SnCl₂(meso-bpse)}_n] and [{n-Bu₂SnCl₂(pdtd)}₂]. J. Braz. Chem. Soc. [online]. 2009, vol.20, n.8, pp. 1441-1447. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532009000800008.

The reactions of meso-1,2-bis(phenylsulfinyl)ethane (meso-bpse) with Ph₂SnCl₂, 2-phenyl-1,3-dithiane trans-1-trans-3-dioxide (pdtd) with n-Bu₂SnCl₂ and 1,2-cis-bis-(phenylsulfinyl)ethene (rac-,cis-cbpse) with Ph₂SnCl₂, in 1:1 molar ratio, yielded [{Ph₂SnCl₂(meso-bpse)}_n], [{n-Bu₂SnCl₂(pdtd)}₂] and [{Ph₂SnCl₂(rac,cis-cbpse)}_x] (x = 2 or n)_, respectively. All adducts were studied by IR, Mössbauer and ¹¹⁹Sn NMR spectroscopic methods, elemental analysis and single crystal X-ray diffractometry. The X-ray crystal structure of [{Ph₂SnCl₂(meso-bpse)}_n] revealed the occurrence of infinite chains in which the tin(IV) atoms appear in a distorted octahedral geometry with Cl atoms in cis and Ph groups in trans positions. The X-ray crystal structure of [{n-Bu₂SnCl₂(pdtd)}₂] revealed discrete centrosymmetric dimeric species in which the tin(IV) atoms possess a distorted octahedral geometry with bridging disulfoxides in cis and n-butyl moieties in trans positions. The spectroscopic data indicated that the adduct containing the rac,cis-cbpse ligand can be dimeric or polymeric. The X-ray structural analysis of the free rac-,cis-cbpse sulfoxide revealed that the crystals belong to the C2/c space group.

Palabras llave : Tin(IV) complexes; disulfoxide ligand; crystal structure.