Abstract
The synthesis, as well as chemical and structural characterization, of 1-( p-toluenesulfonyl)cytosine ( 1) and its dinuclear complexes of the composition Pd 2(1-TosC −– N3, N4) 4 ( 3) and Pd 2(1-TosC −– N3, N4) 2DMSO 2Cl 2 ( 4) by means of ESI-MS, IR, 1H NMR and X-ray single crystal analysis are described. Ligand 1 exists in the preferred aminooxo tautomeric form, while both dinuclear complexes reveal the presence of the iminooxo form of the ligand, where 1-TosC − stands for the anion of the cytosine derivative of 1, bridging two palladium atoms. Complex 3 has a paddlewheel structure with two square-planar coordination spheres, consisting of four N atoms each, mutually parallel and perpendicular to the interpalladium vector. Complex 4 is characterized by two mutually parallel square-planar coordination spheres consisting of two nitrogens, sulfur from the solvent molecule and a chloride. A feasible chemical route for the formation of 3 and 4 via the kinetically favoured mononuclear complex Pd(1-TosC– N3) 2Cl 2 ( 2) is proposed, based on the IR, 1H NMR, mass spectrometry, elemental analysis and X-ray structure analysis data.
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