Tridentate to Bidentate in a Platinum(II) Chelate: A 90° Anthranilaldehyde Rotation

Alan J. Jircitano, William G. Rohly, Kristin Bowman Mertes

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The labilization of a coordinated formyl group in a platinum(II) chelate by nucleophilic ligands has been examined structurally. The chelating ligand is the deprotonated dimeric Schiff base condensate of o-aminobenzaldehyde. The aldehyde was trapped in its uncoordinated form by adding a 1:1 molar ratio of triphenylphosphine to the complex in acetonitrile. The resulting adduct crystallizes in the space group C2/c with unit cell dimensions a = 32.75 (6) Å,b= 10.04 (2) Å, c = 19.71 (7) Å, and β = 118.5 (2)°. The immediate coordination sphere of the platinum consists of two nitrogens from the chelate, the phosphorus of the triphenylphosphine, and a chloride. The benzaldehyde ring, upon dissociation of the aldehyde oxygen from the platinum, has rotated 90° to a position perpendicular to the deprotonated o-aminobenzylidene group. The aldehyde oxygen is poised almost directly above the imine nitrogen at a distance of 2.87 (1) Å.

Original languageEnglish (US)
Pages (from-to)4879-4883
Number of pages5
JournalJournal of the American Chemical Society
Issue number16
StatePublished - Aug 1981

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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