ISOLATION OF PALLADIUM(II) QUINOLINE-2-THIONE (HQNS) AND QUINOLINE-2-THIOLATE (QNS) COMPLEXES - CRYSTAL-STRUCTURES OF PD(HQNS)(PME3)CL2, [PD(HQNS)2(PME3)CL][CL] AND VIC-PD2(MU-N-S-ETA-2-QNS)2(ETA-1-QNS)2(PME3)2

Reaction of 2-quinolinethione, HqnS, with [PdCl(PR3)μ-Cl]2 (1) in acetone solution produces Pd(HqnS)(PMe3)Cl2 (2) or under more forcing conditions, [Pd(HqnS)2(PMe3)Cl][Cl] (3). Reaction of 1 with the conjugate anion, quinoline-2-thiolate, qnS, in ethanol gives rise to the unusual N-heterocycle-2-thiolate bridged dipalladium complex, vic-Pd2(μ,N-Sη2-qnS)2(η1-qnS)2(PMe3)2 (4). The crystal and molecular structures of 2, 3·CH2Cl2 and 4 have been determined. Crystallographic data for 2: monoclinic P21/n, Z = 4; a = 11.027(4), b = 11.230(6), c = 12.676(6) Å; β = 92.32(3)°; V = 1568.4(1) Å3, ρ{variant}calc = 1.756 g/cm3. Crystallographic data for 3: triclinic P1, Z = 2; a = 8.902(3), b = 12.858(4), c = 13.303(6) Å; α = 89.28(3), β = 71.24(3), γ = 72.54(2)°; V = 1369.4(8) Å3, ρ{variant}calc = 1.597 g/cm3. Crystallogrphic data for 4: monoclinic P21/n, Z = 4 a = 8.902(3), b = 12.858(4), c = 13.303(6) Å; β = 107.25(3)°; V = 4216(3) Å3, ρ{variant}calc = 1.585 g/cm3. © 1990.