O-sulfinato complexes

O-sulfinato complex, 37 287 sulfito complexes, 37 293 sulfur, selenium, and tellurium tetrahal-ide complexes, 37 299 thiocyanato complexes, 37 264 thioether and selenoether complexes, 37 288... 

Sodium sulfinates NaRS02 (R = Me, Ph or MeC6H4) reacted in ethanol with VC13 and trisfO, O -sulfinato) complexes were obtained.264 The IR spectra are consistent with the sulfinato ions as bidentate. The electronic spectra show two d-d transitions v3 in the range... 

In many transition metal complexes, geometrical and linkage isomerization reactions involve ligand substitution processes. One example of a photoin-duced linkage isomerization reaction, namely, the isomerization from an S-to an O-bonded sulfinato complex, Co(en)2(S02CH2CH2NH2)2+, has been studied as a function of pressure. The O-bonded product undergoes a thermal back reaction to the S-bonded complex and this system, shown in... 

O-bound sulfinato complex, is followed by rearrangement to the thermodynamic product, 5-bound sulfinato complex. 

Infrared spectroscopy is a powerful tool in the structural characterization of metallic sulfinates and sulfonates. The location and wavenumber separation of the symmetrical and asymmetrical vibrations of the SO2 group depend on the nature of the metal-sulfinate linkage. For sulfinate complexes, Vsy (S02) and Vasym(S02) appear between 840 and 1100 cm with 240 < Av < 270 cm suggesting an unidentate O-sulfinato-arrangement. ... 

Sulfur dioxide is a much stronger electrophile than CO2 and also needs no vacant site. If SO2 electrophilically attacks the a carbon of an 18e alkyl from the side opposite the metal, an alkyl sulfinate ion is formed with inversion at carbon. Since the anion has much of its negative charge on the oxygens, it is not surprising that the kinetic product of ion recombination is the O-bound sulfinato complex. On the other hand, the thermodynamic product is usually the S-bound sulfinate, as is appropriate for a soft metal binding. This sequence constitutes a 1,2 (O bound sulfinate) or a 1,1 insertion of SO2 (S bound). 

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