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Four air and moisture-stable palladium(II)-Schiff base complexes, N,N'-bis(-methylsalicylidene)propane-1,3-diamine palladium(II) (2a), N,N'-bis(4-methyl--methylsalicylidene)propane-1,3-diamine palladium(II) (2b), N,N'-bis(3,5-di-tert-butylsalicylidene)propane-1,3-diamine palladium(II) (2c), and N,N'-bis(4-methoxy-salicylidene)propane-1,3-diamine palladium(II) (2d), have been successfully synthesised and characterised by CHN elemental analyses and conventional spectroscopic methods. These complexes were investigated as catalysts in the phosphine-free Mizoroki-Heck cross-coupling reactions of aryl bromides with methyl acrylate. [ABSTRACT FROM AUTHOR]

The title compound, C26H22NP, is a Schiff base derived from triphenyl­phosphine with a 4-methyl­phenyl­amine group attached to one of the benzene rings of the phosphine in the o-position. The azomethine C=N bond length is 1.259 (3) Å and the dihedral angle between the benzene ring and its 4-methyl­phenyl­amine substituent is 40.02 (2) Å. The geometry at the P atom is approximately tetra­hedral. [ABSTRACT FROM AUTHOR]

In the title compound, [PdBr(C(27)H(23)N(3)OPS)]·C(3)H(6)O, the coordination geometry about the Pd(II) atom is distorted square-planar, arising from the attached Br, S, P and N atoms (N and Br are trans), the maximum deviation from the plane being 0.2053 (4) Å for the N atom. The three benzene rings attached to the P atom make dihedral angles of 69.78 (7), 87.05 (7) and 77.50 (7)° with each other. An intra-molecular C-H⋯N hydrogen bond forms an S(6) ring motif. In the crystal, the complex mol-ecules form infinite chains along the a-axis direction through C-H⋯Br inter-actions, and a C-H⋯O inter-action links the main mol-ecule with the acetone solvent mol-ecule.

In the title compound, [Pd(C(21)H(24)N(2)O(4))], the complete mol-ecule is generated by crystallographic mirror symmetry with the Pd and three C atoms lying on the mirror plane. The Pd-O and Pd-N distances are 1.9932 (6) and 2.0029 (7) Å, respectively. The dihedral angle between two benzene rings of the ligand is 79.21 (4)°. In the crystal, C-H⋯O hydrogen bonds link the mol-ecules into layers parallel to the ab plane. These planes are further connected by C-H⋯O inter-actions, forming a three-dimensional network.

The monodeprotonated Schiff base ligand in the title compound, [Sn(CH(3))(C(14)H(19)N(4)S)Cl(2)], N,N',S-chelates to the Sn atom, which is six-coordinated in an octa-hedral environment. The three coordinating atoms along with the methyl C atom comprise a square plane, above and below which are positioned the Cl atoms. The amino group is a hydrogen-bond donor to a Cl atom of an adjacent mol-ecule, the hydrogen bond giving rise to a helical chain extending parallel to [100].

The asymmetric unit of the title complex, [Pd(C(19)H(20)N(2)O(2))]·0.5C(2)H(5)OH, contains two mol-ecules of a Pd(II) complex of a Schiff base ligand with an N(2)O(2) donor set and one ethanol mol-ecule. The Pd(II) centers are in distorted square-planar geometries with the N(2)O(2) donor atoms of the tetra-dentate Schiff base dianions. The ethanol mol-ecule takes part in an O-H⋯O hydrogen bond. In the crystal structure, mol-ecules are stacked approximately along the b-axis direction. The O atom and three H atoms of the solvent molecule are disordered over two positions; the site occupancy factors are ca 0.8 and 0.2.