Bis(8-quinolinolato-N,O)platinum(II) and its synthetic intermediate, 8-hydroxyquinolinium dichloro(8-quinolinolato-N,O)platinate(II) tetrahydrate.
Bis(8-quinolinolato-N,O)platinum(II), [Pt(C(9)H(6)NO)(2)], (I), has a centrosymmetric planar structure with trans coordination. The molecules form an inclined pi stack, with an interplanar spacing of 3.400 (6) A. 8-Hydroxyquinolinium dichloro(8-quinolinolato-N,O)platinate(II) tetrahydrate, (C(9)H(8)NO)[PtCl(2)(C(9)H(6)NO)] x 4H(2)O, (II), is soluble in water and is regarded as the synthetic intermediate of the insoluble neutral compound (I). The uncoordinated 8-hydroxyquinolinium cations and the monoquinolinolate complexes form an alternating pi stack. The origins of fluorescence and phosphorescence in (II) are assigned to the 8-hydroxyquinolinium cation and the monoquinolinolate--Pt complex, respectively.