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Hypoxanthine, xanthine and theobromine complexes with palladium(II) and platinum(IV) chlorides

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Summary

Complexes of the general types Pd(L)(LH)Cl (LH=hxH, xnH, or tbH) and Pt(L)(LH)Cl3 (LH=hxH, or xnH) are formed by boiling under reflux 2∶1 molar mixtures of hypoxanthine (hxH), xanthine (xnH) or theobromine (tbH) and PdCl2 or PtCl4 in ethanol-triethyl orthoformate. These complexes appear to be linear chain polymeric species, characterized by single monoanionic L− ligands bridging between adjacent Pd2+ or Pt4+ ions. Inclusion of one terminal neutral LH and one terminal chloro-ligand completes the coordination sphere in the square-planar Pd2+ complexes, while the Pt4+ complexes aretrans-octahedral, involving three terminal chloro and one terminal LH ligand per platinum. The possible binding sites of the bidentate bridging L− and the unidentate terminal LH are discussed.

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Authors and Affiliations

  1. Department of Chemistry and Physics, Beaver College, 19038, Glenside, Pennsylvania, USA

    Chester M. Mikulski, Scott Grossman & Chung Ja Lee

  2. Amoco Chemicals Co., PO Box 400, 60566, Naperville, Illinois, USA

    Nicholas M. Karayannis

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  1. Chester M. Mikulski
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  2. Scott Grossman
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  3. Chung Ja Lee
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  4. Nicholas M. Karayannis
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Mikulski, C.M., Grossman, S., Lee, C.J. et al. Hypoxanthine, xanthine and theobromine complexes with palladium(II) and platinum(IV) chlorides. Transition Met Chem 12, 21–25 (1987). https://doi.org/10.1007/BF01023123

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