The dimer [{(?6-p-cymene)RuCl}2(?-Cl)2] (cymene=MeC6H4iPr) reacts with N,N?-bis(p-tolyl)-N??-(2-pyridinylmethyl)guanidine (H2L1) and N,N?-bis(p-tolyl)-N??-(2-diphenylphosphanoethyl)guanidine (H2L2), in the presence of NaSbF6, giving rise to chlorido compounds formula [(?6-p-cymene)RuCl(H2L)][SbF6] (H2L=H2L1 (1), H2L2 (2)) which guanidine ligand adopts a ?2 chelate coordination mode. related (S)...

We report the unprecedented observation and unequivocal crystallographic characterization of the metastable ligand loss intermediate solvento complex trans-[Ru(bpy)(k-btz)(k-btz)(NCMe)] (1a) that contains a monodentate chelate ligand. This and analogous complexes can be observed during the photolysis reactions of a family of complexes of the form [Ru(N _ N)(btz)2] 2+ (1a–d : btz=1,1’-dibenzyl-4...

A new Schiff base ligand (L) obtained by the condensation reaction of N-acetylaceto-otoluidineand 2-aminopropanoic acid (an amino acid), is used to synthesize four mononuclearcomplexes of [MLCl] and [ML2] types (where M = Cu(II) and Zn(II); L = Schiff base) bykeeping the metal and ligand ratio as 1:1 and 1:2 respectively. This ligand and its complexeshave been characterized on the basis of diff...

Terpyridine and quaterpyridine-based complexes allow wide light harvesting of the solar spectrum. Terpyridines, with respect to bipyridines, allow for achieving metal-complexes with lower band gaps in the metal-to-ligand transition (MLCT), thus providing a better absorption at lower energy wavelengths resulting in an enhancement of the solar light-harvesting ability. Despite the wider absorptio...

Coordination-driven self-assembly of metal ions and organic ligands has been extensively applied over the past few decades, towards construction various functional two-dimensional (2D) three-dimensional (3D) architectures. The majority these structures are homoleptic in nature, consisting one type ligand. However, functionality self-assembled complexes can be potentially increased by increasing...

The synthesis and crystal structures of three heteroleptic complexes Zn(II) Cd(II) with pyridine ligands (ethyl nicotinate (EtNic), N,N-diethylnicotinamide (DiEtNA), 2-amino-5-picoline (2Ampic) are presented. complex [Zn(EtNic)2Cl2] (1) showed a distorted tetrahedral coordination geometry two EtNic ligand units chloride ions as monodentate ligands. Complexes [Zn(DiEtNA)(H2O)4(SO4)]·H2O (2) [Cd(...

Novel heteroleptic iridium complexes containing the 1-substituted-4-phenyl-1H1,2,3-triazole (phtl) cyclometalating ligand have been synthesized. The 3+2 Huisgen dipolar cycloaddition method (‘click’ chemistry) was utilized to prepare a class of bidentate ligands (phtl) bearing different substituents on the triazole moiety. By using various ligands (phtl-R1 and pytl-R2) (R1=adamantane, methyl an...

The complexation behavior of two novel, chiral pinene–bipyridine-type ligands ((–)-HL1 and (–)-HL2) containing a carboxylic arm towards lanthanide Ln(III) (Ln = La, Eu, Lu) ions was investigated through spectroscopic methods. association constants the mononuclear complexes determined from UV-Vis titrations indicated that ligand (–)-HL1 possessing shorter formed more stable compared with (–)-HL2...

a new tris-chelate cd(ii) complex, [cd(dadmbtz)3](clo3)2 has been successfully synthesized and characterized by ir, 1h, 13c nmr spectroscopy, elemental analysis and single crystal x-ray determination. the thermal behavior, uv-vis and fluorescence spectra of compound were studied. in reaction with dadmbtz, cadmium (ii) forms a tris-chelate complex with nearly c3 symmetry for coordination polyhed...

The syntheses of two new ligands, 3,4-di(2-pyridyl)-1,2,5-oxadiazole (dpo) and 3,4-di(2-pyridyl)-1,2,5-thiadiazole (dpt), are described. Complexes with palladium and copper have seven-membered chelate rings with coordination through the two pyridine nitrogens, whereas in the silver nitrate complex of dpt the ligand acts as a bridge between metal centres. Studies of the mononuclear ruthenium com...