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The synthesis of the sulfinato derivatives 1-7 of pentavalent VB-elements follows equation (2). These compounds differ significantly in their physical and chemical properties and in their structures. In between the extremes of the purely ionic tetramethylam-monium sulfinates la-c and the typically covalent and pentacoordinated tetraorganyl-sulfinato-O-stiboranes 6-7, there are the hexa-or pentavalent compounds of phosphorus and arsenic 2 and 4 or 3 and 5 with sulfinato-O,O' or sulftnato-O linkage, which dissociate readily into their ionic components. 1 a-c are suitable for the synthesis of sulfones according to equation (3). All of the methylsulfinato derivatives can be easily transformed (equation (4)) into the corresponding sulfonates by air oxidation. Only the tetraphenylsulfinato-O-stiboranes 7 a-c show SO 2 -elimination forming pentaorganylstiboranes (equation (5)). IR, mass and in some cases NMR spectra are reported.

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Koordinationschemie ambivalenter Liganden, VIII 1  Synthese und Reaktivität ionischer und kovalenter Sulfinato-Komplexe von Tetraorganyl-VB-Elementen des Typs R 4 'EO 2 SR / Coordination Chemistry of Ambivalent Ligands, VIII 1  Synthesis and Reactivity of Ionic and Covalent Sulfinato Complexes of Tetraorganyl-VB-Elements of the Type R 4 'EO 2 SR