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The reactions of bis[triphenyltin(IV)] selenate monohydrate [(Ph 3 Sn) 2 O 4 Se · H 2 O ] with tetraphenylphosphonium halides Ph 4 PX (X = Cl, Br) led to the formation of 1:1 complexes of formula {Ph 4 P[(SeO 4 )(SnPh 3  (SnPh 3 X)] k  [X = Br (I) or Cl (II)], which were characterized by infrared, Mössbauer and H,  13 C and Sn  119 Sn NMR techniques and by X-ray diffractometry. The complexes have polymeric structures in which the [SnPh 3 ] +  units alternate with bridging [SeO 4 ] 2-  units, each of which also bears an SnPh 3 X side chain. In both the [SnPh 3 ] +  and the [SnPh 3 X] units the coordination polyhedron of the tin atom is a distorted trigonal bipyramid.

Synthesis, Spectroscopic Characterization and Crystal and Molecular Structures of {Ph 4 P[(Se0 4 )(SnPh 3 )(SnPh 3 X)]}n (X = Cl, Br)