This work demonstrates an example of dimetallic complexes as catalysts for the C-N bond formation. Dicopper(I) complexes resulting from complexation of [Cu(CH₃CN)₄](PF₆) with 2,7-bis(2-pyridyl)-1,8-naphthyridine have proved to be good catalysts for coupling/cyclization of 2-bromobenzoic acids with amidines leading to quinazolinones.

An iron complex coordinated by three 1-nitroso-2-naphtholate ligands through nitrogen and oxygen atoms is applied as an efficient catalyst for the direct hydroxylation of aromatic compounds to phenols in the presence of H₂O₂, the hydroxyl radical is proved to be responsible for the hydroxylation by the experimental and theoretical results.

This paper describes a palladium/copper-catalyzed decarboxylative coupling of aryl iodides with α-oxocarboxylates. The cross-coupling reaction gives high chemical yields of aryl ketones and has wide functional group tolerance, making the transformation an attractive alternative to traditional cross-coupling approaches for aryl ketones.

A novel series of nano-sized Zn(II) macrocyclic complexes has been synthesized using a template method, i.e. by the in situ reaction of Schiff bases and 1,4-dibromobutane in the presence of zinc(II) acetate dihydrate in ethanol. The complexes were characterized using spectroscopic methods, scanning electron microscopy and thermal analysis. The catalytic properties of these complexes were investigated kinetically for the hydrolysis of p-nitrophenylacetate and showed significant activity. Therefore, these complexes may serve as model compounds for hydrolytic enzymes.

2-Py-amidine Ni(II) complexes were used as catalyst precursors with methylaluminoxane (MAO) as a co-catalyst for the vinylic polymerization of norbornene. The catalysts yield high-molecular-weight polymers (10⁶ g mol⁻¹, M_w/M_n = 1.68–2.78) at an activity level of 10⁶ g (mol Ni)⁻¹ h⁻¹. The less bulky 1/MAO catalyst shows 2.5 to 3.5 times higher activities than the bulky 2/MAO catalyst.

The Sonogashira coupling reaction of aryl halides with phenylacetylene proceeds efficiently in water using SiO₂-acac-PdNPs as the catalyst in the absence of copper co-catalyst and phosphine ligands at reflux temperature under aerobic conditions.

Cyanation of aryl halide with K₄[Fe(CN)₆]⋅3H₂O has been carried out in the presence of a high-activity catalyst: an air-stable hemilabile P–O coordinated cyclopalladated complex. This method is applicable to both activated and deactivated aryl halides and a variety of aromatic nitriles were obtained in good yields under aerobic conditions.

Pd(II) complexes bearing di- and monochelate fluorinated β-ketonaphthyliminato ligand were synthesized and employed to highly efficiently catalyze the vinyl-addition polymerization of norbornene with activity of 3.4 × 10⁶ g_polymer mol_Pd⁻¹ h⁻¹. They also show high catalytic activity towards copolymerization of norbornene and an ester-functionalized norbornene derivative (NB-COOCH₃), the amount of which incorporated into the copolymer can be tuned from 2.8 to 21 mol% by controlling the NB-COOCH₃ content in the feed.

New complexes from 2-(pyridine-1-ium-1-yl)acetate were synthesized and characterized. The biological activity were tested.

3-Chlorobenzaldehyde hydralazine hydrazone and its transition metal complexes were investigated for their antimicrobial activity against two Gram-positive and three Gram-negative bacterial strains and three fungal strains. Excellent inhibitory activity is exhibited against Gram-positive bacteria E. faecalis and S. mutans, which play a major role in tooth decay, and the fungal strain C. albicans.

The aryl allylation of methyl- or (n-butyl)(aryl)zinc reagents in THF at room temperature in the presence of NiCl₂(Ph₃P)₂ catalyst and LiCl as an additive provides an atom-economic alternative to coupling of diarylzincs (α:γ ratio = 80:20 to 60:40).