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Four new phenylphosphonato SnR 3  (R=Ph, Me) derivatives have been synthesized and characterized by infrared and Mössbauer spectroscopy. The structure of catena-poly[PhPO 3 HSnMe 3 ]  n   has been determined by single-crystal X-ray diffraction analysis. The Sn IV  atoms are five-coordinated in all compounds, with the SnC 3 O 2  framework in a trans trigonal bipyramidal arrangement and the PhPO 3 H -  anions being in axial positions. The molecular structure of [PhPO 3 HSnMe 3 ]  n   is arranged as a one-dimensional coordination polymer in which planar SnMe 3  groups are axially bridged by -O-P-O- linkages of the PhPO 3 H -  ligand. Neighboring chains are linked via O-H ∙∙∙ O hydrogen bond interactions, generating a layered structure. In the R 2 NH 2 (PhPO 3 H) 2 SnR′ 3  (R=Cy, Bu; R′=Ph, Me), the SnPh 3  or SnMe 3  residue is axially coordinated by two monodentate PhPO 3 H - . The role of the dialkylammonium cation, R 2 NH 2  + , is crucial in the lattice building via a hydrogen bond network. These hydrogen bonds contribute to the crystal stability and compactness and result in a three-dimensional arrangement. The aqua complex PhPO 3 (SnPh 3 ) 2 ·2H 2 O has a discrete structure and the anion PhPO 3  2-  behaves as a bidentate ligand.

Synthesis, spectroscopic characterization and crystal and molecular structures of phenylphosphonato SnR 3 (R=Ph, Me) derivatives