Transition metal complexes of 1,3-bis(thiomorpholino)propane:: crystal structure and dynamic 1H NMR study

Complexes of 1,3-bis(thiomorpholino)propane (L) with Zn(II), Pd(II), Pt(II) and Rh(III) of the formula [ZnLCl2], [ML](ClO4)(2), (M = Pd and Pt), [RhLCl2]Cl . 4H(2)O and [RhLCl2]PF6 were prepared and characterised. The molecular structures of [ZnLCl2], [PdL](ClO4)(2) and [RhLCl2]PF6 were determined by X-ray diffraction. In [ZnLCl2], the ligand acts in a bidentate fashion using its two N atoms while the two S atoms remain free and the coordination structure is a distorted tetrahedron. [PdL](ClO4)(2) possesses a distorted square planar coordination geometry with all the four hetero atoms being coordinated. The coordination structure of [RhLCl2]PF6 is a distorted octahedron with the two Cl atoms in trans position and L also acting as a tetradentate ligand. In addition to the crystal structures, the dynamic H-1 NMR behaviour of the three complexes were also investigated. (C) 1999 Elsevier Science S.A. All rights reserved.