Zn/Cu Complexes Constructed through Selective in Situ Br−Cl Exchange: Synthesis, Structures, Properties, and DFT Insights into the Cu-Catalyzed Mechanism

Two coordination polymers (CPs) [Cu2(L1)(µ3-OH)(H2O)]n (1) and {[Zn4(L)2(4,4′-bipy)3]•4H2O}n (2) were synthesized under solvothermal conditions. It is unexpectedly found the transformation of aryl−Br to aryl−Cl (Br-Cl exchange) in the formation of...

Effect of 3d heterometallic ions on the magnetic properties of azido-Cu(II) with isonicotinic acid coligands: A theoretical perspective

Based on density functional theory and the broken-symmetry approach, the magnetic properties of an azido-Cu(II) complex with isonicotinic acid coligands were studied at the B1LYP/def2-TZVP level. According to the molecular magnetic orbitals and Mulliken spin population analysis, there are strong orbital interactions between the paramagnetic Cu^II/Ni^II ions and the bridging azide ligands and isonicotinic ions. The supposedly empty 4s/4p/4d orbitals of the M^II ions are found to play an important role in the mechanism of magnetic coupling and are probed using NBO analysis. As the number of unpaired electrons on the M^II ions increases, the number of electrons that occupy the empty 4d orbitals with the highest energy and overlap integrals of the magnetic orbitals in the Cu^IIM^II (M = Cu, Ni, Co, Fe, Mn) model complexes increases accordingly, and the magnetic coupling constant gradually decreases.

Synthesis and characterization of γ-Fe2O3@SiO2–(CH2)3–PDTC–Pd magnetic nanoparticles: a new and highly active catalyst for the Heck/Sonogashira coupling reactions

A novel catalyst is synthesized based on the immobilization of palladium on γ-Fe₂O₃@SiO₂–(CH₂)₃–PDTC nanoparticles and is used as a highly active catalyst for the Heck/Sonogashira coupling reactions.

Solvent coligands fine-tuned the structures and magnetic properties of triple-bridged 1D azido-copper(ii) coordination polymers

The structures and magnetic properties of three triple-bridged 1D azido–Cu(ii) coordination polymers are well-regulated by altering the coordinated alkanol molecules.

Solvent-induced single-crystal-to-single-crystal transformation and tunable magnetic properties of 1D azido-Cu(ii) chains with a carboxylate bridge

The solvent effect leads to structural transformation and tunable magnetism of chain-like azido-copper coordination polymers.