An-Najah Staff

Five trans-[Ru(P-P)₂Cl₂] complexes were prepared by reacting RuCl₂(PPh₃)₃ with P-P ligands {P–P = 3-hexyl-1,3-bis(diphenylphosphino) propane (hdppp) (1); = 1,3-bis(diphenylphosphino)propane (dppp) (2); = 1,2-bis(diphenylphosphino)ethane (dppe) (3); 1.1’-bis(diphenylphosphino)methane (dppm) (4); 1,2-bis(diphenylphosphino)ethylene (depe) (5}. The complexes were characterized by an elemental analysis, IR, ¹H, ¹³C and ³¹P{1H}NMR, FAB-MS and TG/DTA. These Ru(II) complexes showed Ru(III)/Ru(II) quasireversible redox couple. The molecular structures of the complexes 1 and 3 were determined by X-ray crystallography, and their spectroscopic properties were studied. Another polymorph of 3 was reported in literature, the reported polymorph of 3 in this work crystallizes in p-1 space group, whereas, the previously reported polymorph crystallizes in C2/c space group. The two complexes adopt a distorted trans octahedral coordination and ruthenium (II) ions are located on a crystallographic centre of symmetry. Based on the optimized structures, computational investigations were carried out in order to determine the electronic structures of the complexes. The electronic spectra of 1 and 1⁺ in dichloromethane were calculated with the use of time-dependent DFT methods, and the electronic spectra of the transitions were correlated with the molecular orbitals of the complexes.

A new series of PdII complexes derived from thiosemicarbazone has been synthesized. The
synthesized PdII complexes have been characterized on the basis of elemental analyses, FT-IR, 1H- and
13C-NMR, UV/VIS, and thermal studies. A square-planar geometry has been assigned around PdII ions
on the basis of results obtained from UV/VIS studies. The thiosemicarbazone ligand and its PdII
complexes have been screened against Gram-positive (Bacillus subtilis and Staphylococcus aureus)
and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria in vitro as growth-inhibiting
agents, and the results revealed significant antibacterial activities.

In the title racemic Schiff base ligand, C20H20Cl2N2, which was
prepared by the condensation of 2-chlorobenzaldehyde and
cyclohexane-1,2-diamine, the cyclohexane ring adopts a chair
conformation and the dihedral angle between the aromatic
rings of the 2-chlorophenyl substituent groups is 62.52 (8). In
the structure, there are two short intramolecular methine C—
H  Cl interactions [C  Cl = 3.066 (2) and 3.076 (3) A ° ], and
in the crystal there are also weak intermolecular aromatic C—
H  Cl [3.464 (3), 3.553 (3) and 3.600 (3) A ° ] and Cl  Cl
[3.557 (3) and 3.891 (3) A ° ] contacts.

Several successfully methods to prepare Copper(II)-oxide (Cu=O) nanostructures with different sizes and shapes and their applied in different man daily life applications were investigated in this study. This paper discusses different Cu=O nanostructures synthesis methods and their characterization as well as their applications. The pulsed wire explosion method of synthesis was discussed in detail.

In the title compound, C15H14O3, the dihedral angle between the benzene rings is 75.85 (7)°. In the crystal, centrosymmetrically related molecules are weakly associated through pairs of interactions between a benzene ring and an O atom of the ester group [ring centroid O = 3.952 (7) Å], and through pairs of interactions between the other benzene ring and an O atom of the phenoxy group [ring centroid O = 3.912 (7) Å], giving chains extending along [110].

C16H16N2O6S2, triclinic, P1 (no. 2), a = 5.392(2) Å, b = 9.300(4) Å, c = 9.420(4) Å,  = 93.933(9)°,  = 90.20(1)°,  = 106.375(9)°, V = 452.0 Å3, Z = 1, Rgt(F) = 0.047, wRref(F2) = 0.157, T = 293 K

C33H40Cl2N2P2Ru, triclinic, P1 (no. 2), a = 9.870(1) Å, b = 13.044(1) Å, c = 14.446(3) Å, + = 110.86(1)°, * = 100.55(1)°, & = 107.657(9)°, V = 1565.2 Å3, Z = 2, Rgt(F) = 0.028, wRref(F2) = 0.067, T = 173 K.

In the title compound, [CdI2(C14H12N2)], the molecule sits on a crystallographic twofold axis. The coordination sphere of the CdII atom is built of two symmetry-equivalent N atoms of one 2,9-dimethyl-1,10-phenanthroline (dmphen) ligand and two symmetry-equivalent I atoms, thus forming a distorted tetrahedral geometry. Inversion-related molecules interact along the c-axis direction by π -π stacking interactions between the phenanthroline ring systems, with centroid-centroid distances of 3.707 (9) and 3.597 (10) Å.

In the title compound, [PdCl2(C26H24P2)].C2H6OS, the PdII atom adopts a distorted cis-PdCl2P2 square-planar coordination geometry. The five-membered chelate ring adopts an envelope conformation with a methylene C atom in the flap position. The S and C atoms of the dimethyl sulfoxide (DMSO) solvent molecule are disordered over two sets of sites in a 0.8976 (18):0.1024 (18) ratio. The DMSO O atom accepts three C-H O hydrogen bonds from an adjacent complex molecule.

In the molecule of the title compound, C16H20N4, the 1,3-diazinane ring adopts a chair conformation and the dihedral angle formed by the pyridine rings is 78.64 (8)°. The molecular conformation is stabilized by an intramolecular C-H N hydrogen bond, forming an S(6) ring motif. In the crystal, centrosymmetrically related molecules are linked into dimers by pairs of N-H N hydrogen bonds, generating rings of R22(10) graph-set motif.