Antitumor activity of phenylene bridged binuclear bis(imino-quinolyl)palladium(II) and platinum(II) complexes.

Antitumor effects of a known bis(imino-quinolyl)palladium(II) complex 1 and its newly synthesized platinum(II) analogue 2 were evaluated against human breast (MCF-7) and human colon (HT-29) cancer cell lines. The complexes gave cytotoxicity profiles that were better than the reference drug cisplatin. The highest cytotoxic activities were pronounced in complex 2 across the two examined cancer cell lines.

Imino-phosphine palladium(II) and platinum(II) complexes: synthesis, molecular structures and evaluation as antitumor agents.

The imino-phosphine ligands L1 and L2 were prepared via condensation reaction of 2-(diphenylphosphino)benzaldehyde with substituted anilines and obtained in very good yields. An equimolar reaction of L1 and L2 with either PdCl2(cod) or PtCl2(cod) gave new palladium(II) and platinum(II) complexes 1-4. The compounds were characterized by elemental analysis, IR, (1)H and (31)P NMR spectroscopy.

Dichlorido{N-[(5-methyl-thio-phen-2-yl)methyl-idene]-2-(pyridin-2-yl)ethanamine-κ(2) N,N'}palladium(II).

In the title compound, [PdCl2(C13H14N2S)], the Pd(II) ion is coordinated by two N atoms of the chelating bidentate ligand and two chloride anions, giving rise to a distorted square-planar geometry. The methyl-substituted thio-phene arm and the pyridine ring are connected to the metal cation through N atoms to form a six-membered chelate ring with a boat conformation, making the complex stable.

Dichlorido{N-[2-(diphenylphosphanyl)benzylidene]-2-methylaniline}palladium(II) acetonitrile monosolvate.

The title imino-phosphine compound, [PdCl2(C26H22NP)]·CH3CN, was prepared by reaction of N-[2-(diphenylphosphanyl)benzylidene]-2-methylaniline with dichlorido(cycloocta-1,5-diene)palladium(II) in dry CH2Cl2. The Pd(II) cation is coordinated by the P and N atoms of the bidentate chelating ligand and by two chloride anions, generating a distorted square-planar coordination geometry. There is a detectable trans influence for the chloride ligands.

Dichlorido{2-[(2,6-diethylphenyl)iminomethyl]quinoline-κ2N,N'}palladium(II) acetonitrile monosolvate.

The title complex, [PdCl(2)(C(20)H(20)N(2))]·CH(3)CN, was synthesized by the reaction of 2-[(2,6-diethylphenyl)iminomethyl]quinoline with dichlorido(cycloocta-1,5-diene)palladium(II) in dry CH(2)Cl(2). The Pd(II) ion is coordinated by two N atoms of the bidentate quinoline ligand and by two chloride anions, generating a distorted square-planar coordination geometry around the metal centre. There is a detectable trans influence for the chloride ligands.

Dichloridobis[(ferrocenyl-methyl-idene)(furan-2-ylmeth-yl)amine-κN]palladium(II).

The title compound, [Fe(2)Pd(C(5)H(5))(2)(C(11)H(10)NO)(2)Cl(2)], exhibits a square-planar geometry at the Pd(II) atom, which is determined by inversion-related chlorine and ferrocenyl-imine mol-ecules across a center of symmetry. The ferrocenyl-imine moieties are trans to each other.

Dichlorido[2-(phenyl-imino-meth-yl)quinoline-N,N']palladium(II).

In the title complex, [PdCl(2)(C(16)H(12)N(2))], the Pd(II) ion is coordinated by two N atoms [Pd-N 2.039 (2), 2.073 (2) Å] from a bidentate ligand and two chloride anions [Pd-Cl 2.

Chlorido[2-({[2-(diphenyl-phosphan-yl)-benzyl-idene]amino}-meth-yl)thio-phene-κN,P]methyl-palladium(II).

In the title compound, [Pd(CH(3))Cl(C(24)H(20)NPS)], the Pd(II) ion is coordinated in a distorted square-planar environment which includes the P and N atoms of the bis-chelating ligand. The thio-phene ring is rotationally ordered, unlike in the majority of crystal structures containing this group.

Quinoline-2-carbaldehyde.

The title compound, C(10)H(7)NO, crystallizes with two almost planar mol-ecules (A and B) in the asymmetric unit (r.m.s.

Dichlorido{2-[(thio-phen-2-ylmeth-yl)imino-meth-yl]pyridine-κN,N'}palladium(II).

In the title compound, [PdCl(2)(C(11)H(10)N(2)S)], the Pd(II) ion is four-coordinated in a distorted square-planar environment by two N atoms of the chelating 2-[(thio-phen-2-ylmeth-yl)imino-meth-yl]pyridine ligand and two chloride anions. The thio-phene ring is rotationally disordered over two orientations in a 1:1 ratio. The crystal packing exhibits weak inter-molecular C-H⋯Cl and C-H⋯S hydrogen bonds.

Chlorido{N-[2-(diphenylphosphanyl)benz-ylidene]-2-(2-thienyl)ethanamine-κN,P}methylpalladium(II) dichloromethane hemisolvate.

In the title compound, [Pd(CH(3))Cl(C(25)H(22)NPS)]·0.5C(2)H(2)Cl(2), the Pd(II) atom is coordinated by the N,P-bidentate ligand, a methyl group and a chloride ion, generating a distorted square-planar PdCClNS coordination geometry, with the N and Cl atoms trans. The thio-phene ring is equally disordered over two orientations and the dichloro-methane solvent mol-ecule is disordered about an inversion centre.