We report the synthesis, structural investigation, and thermal behavior for three zinc-based 1D-coordination polymers with 3,6-di-tert-butyl-2,5-dihydroxy-p-benzoquinone, which were synthesized in the presence of different glycols. The interaction of zinc nitrate with glycols, followed by using the resulting solution in solvothermal synthesis with the anilate ligand in DMF, makes it possible to obtain linear polymer structures with 1,2-ethylene or 1,2-propylene glycols coordinated to the metal. The reaction involving 1,3-propylene glycol under similar conditions gives a crystal structure that does not contain a diol. The crystal and molecular structures of the synthesized compounds were determined using single crystal by X-ray structural analysis. The influence of glycol molecules coordinated to the metal on the thermal destruction of synthesized compounds is shown.

A new cage-like dimeric nickel(II) complex Ni₂L₂(DMSO)₄ based on a ditopic redox-active hydroxy-para-iminobenzoquinone type ligand LH₂ (L is 4,4′-(1,3-phenylene-bis(azaneylylidene))-bis(3,6-di-tert-butyl-2-oxycyclohexa-2,5-dien-1-one dianion) was synthesized in DMSO at 120 °C. The molecular structure of the synthesized compound was determined by X-ray diffraction analysis. The complex Ni₂L₂(DMSO)₄ is almost insoluble in all organic solvents, probably due to the presence of a large number of intermolecular contacts in its structure. The electronic spectrum and thermal stability of the crystalline compound have been studied.

New dihalogenotin(IV) complexes with 3,6-di-tert-butyl-o-benzoquinone and diimine ligands, pyrazino[2,3-f][1,10]phenanthroline (DPQ) and dipyrido[3,2-a:2'3'-с]phenazine (DPPZ), are synthesized and structurally characterized. The complexes have the distorted octahedral coordination environment in which the catecholate and diimine ligands are mutually cis-oriented. The electronic absorption spectra of the synthesized compounds exhibit the charge-transfer bands between the donor catecholate and acceptor nitrogen-containing ligands in the range of 400–650 nm causing their intense color. The position of the maximum in the absorption spectra depends on the nature of the halogen substituent and extent of π-conjugation of the diimine ligand. The reaction of the starting 3,6-di-tert-butylcatecholatodichloridotin(IV) complex with 2,2'-azobis(pyridine) is accompanied by a complete two-electron transfer from the catecholate ligands to the nitrogen-containing ligand with the formation of the biradical binuclear system. An analysis of the absorption spectrum demonstrates a series of electronic transitions in a range of 700–1400 nm attributed to the charge transfer between the organic ligands of the complex.

New catecholates of iodine gallium(III) with iminopyridine ligands 1-4 were synthesized and investigated. The crystal structures all obtained complexes were confirmed using single-crystal X-ray diffraction. All five-coordinate gallium catecholates obtained exhibit ligand-to-ligand charge transfer in the near-infrared region, in the range of 500–900 nm. Compounds 1 and 2 demonstrated photothermal conversion efficiencies of 36.7% and 42.2%, respectively, in the therapeutically relevant 808 nm region.