STRUCTURAL STUDIES IN MAIN GROUP CHEMISTRY .24. TRIMETHYLTIN 2-PYRIDYLCARBOXYLATE MONOHYDRATE

The crystal and molecular structure of the title compound has been determined by Patterson and Fourier techniques from diffractometer data using 4266 independent non-zero reflections. Cyrstals are orthohombic, space group Pca2, with a 27.015(6), b 13.471(3), c 14.028(4) Å, Z 4. The geometry at all four crystallographically independent tin atoms resembles that in Me3SnO3SPh.H2O and Me3SnNo3.H20, with trigonal bipyramidal coordination and planar (Me3Sn) units. Axial coordination sites are occupied by an unidentate 2-pyridylcarboxylate group (mean SnO 2.18(2) Å) and a water molecule (mean SnO 2.43(3) Å). The crystal structure differs from that of the analogous phenylsulphonate and nitrate in possessing a three-, rather than a one-dimensional, network of hydrogen-bonds involving the pyridyl nitrogen atom, the carbonyl oxygen atom, and the water molecule. © 1979.