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.

New charge-transfer complexes with pyrazine are synthesized from germanium(IV) and silicon(IV) bis(catecholates): 36Сat₂Ge, 35Cat₂Ge, and 36Сat₂Si (36Сat and 35Cat are 3,6- and 3,5-di-tert-butylpyrocatechol dianions, respectively). The synthesized compounds in the crystalline state are 1D coordination polymers with the octahedral environment of the complexing agent. The electronic absorption spectra of suspensions of the crystalline compounds in Nujol demonstrate an absorption in a range of 450–800 nm causing their intense color. A set of the spectral and theoretical studies indicates that the synthesized metal-organic frameworks of silicon and germanium can be considered as donor–acceptor chromophores with the photoinduced interligand charge transfer between the donor catecholate and acceptor pyrazine ligands.

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 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.

The synthesis, structural characterization, and catalytic activity of two new heavier tetrylene complexes supported by a triazenide ligand are reported. Treatment of Lappert's stannylene or germylene with 1,3-diphenyltriazene (TRZH) affords the corresponding bis(triazenide) complexes TRZ₂Sn (1) and TRZ₂Ge (2) in high yields as sufficiently air-stable, monomeric compounds. Spectroscopic and X-ray crystallographic studies confirm their formation. The molecular structures feature a tetracoordinate group 14 metal center bound by two bidentate triazenide ligands, adopting a distorted tetrahedral geometry indicative of a stereochemically active lone pair. Despite observed asymmetry in the M–N bonds, the N–N distances within the chelating ligands remain symmetric. Mapping of the Molecular Electrostatic Potential (MESP) provides a clear visualization of the lone pair distribution, revealing a more nucleophilic character for the germanium center compared to its tin analog. Furthermore, both complexes demonstrate effective catalytic performance in the hydroboration of aldehydes with HBpin under ambient conditions, showcasing their utility as readily accessible and air-stable catalysts for this transformation.