Synthesis and crystal structures of three organoplatinum(II) complexes bearing natural aryl-olefin and quinoline derivatives.

Three organoplatinum(II) complexes bearing natural aryl-olefin and quinoline derivatives, namely, [4-meth-oxy-5-(2-meth-oxy-2-oxoeth-oxy)-2-(prop-2-en-1-yl)phen-yl](quinolin-8-olato)platinum(II), [Pt(C(13)H(15)O(4))(C(9)H(6)NO)], (I), [4-meth-oxy-5-(2-oxo-2-propoxyeth-oxy)-2-(prop-2-en-1-yl)phen-yl](quinoline-2-carboxy-l-ato)platinum(II), [Pt(C(15)H(19)O(4))(C(10)H(6)NO(2))], (II), and chlorido-[4-meth-oxy-5-(2-oxo-2-propoxyeth-oxy)-2-(prop-2-en-1-yl)phen-yl](quinoline)-plat-inum(II), [Pt(C(15)H(19)O(4))Cl(C(9)H(7)N)], (III), were synthesized and structurally characterized by IR and (1)H NMR spectroscopy, and by single-crystal X-ray diffraction. The results showed that the cyclo-platinated aryl-olefin coordinates with Pt(II) via the carbon atom of the phenyl ring and the C=C(olefinic) group. The deprotonated 8-hy-droxy-quinoline (C(9)H(6)NO) and quinoline-2-carb-oxy-lic acid (C(10)H(6)NO(2)) coordinate with the Pt(II) atom via the N and O atoms in complexes (I) and (II) while the quinoline (C(9)H(7)N) coordinates via the N atom in (III). Moreover, the coordinating N atom in complexes (I)-(III) is in the cis position compared to the C=C(olefinic) group. The crystal packing is characterized by C-H⋯π, C-H⋯O [for (II) and (III)], C-H⋯Cl [for (III) and π-π [for (I)] inter-actions.