Coordination polymers [Gd₂(5-iip)₃(DMF)₄]·0.4DMF (1) and [Dy₂(5-iip)₃DMF₂]·0.33DMF (2) (5-iip²⁻—5-iodoisophthalate) feature two different structural types, as follows from X-ray diffractometry data. We prepared and characterized an extended series of corresponding heterometallic complexes of the composition [Gd_xDy_2−x(5-iip)₃DMF₂]·0.33DMF and [Eu_xDy_2−x(5-iip)₃DMF₂]·0.33DMF, where x = 0.2, 0.4…1.8, and examined the changes of their luminescent properties induced by variations of metal composition, finding the promising white emission sources with high light purity.

Two new 3D metal-organic coordination polymers [Zn₂(2-I-bdc)₂bpen]_n (1) and [Zn(I-ipa)bpen]_n (2) based on zinc, 2-iodoterephthalate (2-I-bdc), 5-iodoisophthalate (5-I-ipa), and 1,2-bis(4-pyridyl)ethylene (bpen) have been prepared. The structure of these metal-organic coordination polymers has been established by X-ray diffraction.

New antimony complexes, (3-Br-1-EtPy)₃[Sb₂I₉] (1) and (1,2-Me₂Py)₄[Sb₈I₂₈] (2) have been prepared by the reaction of SbI₃ with iodides of the corresponding cations in organic solvents. The features of the crystal structure of the compounds have been determined by X-ray diffraction. The complexes are thermally stable at least up to 200°C and have a band gap of ~2.2 eV.

The reactions of a solution of Sb₂O₃ in HBr, Br₂, and 1,1'-(propane-1,3-diyl)bis(3-halogenpyridinium) bromides (halogen = Cl (I), Br (II)) afford bromoantimonates(V) Cat{[SbBr₆](Br₃)}, whose structures are determined by single-crystal X-Ray diffraction (SCXRD). Tribromide and hexabromoantimonate anions form supramolecular one-dimensional polymers due to the formation of a halogen bond between them, and the cations are also involved in halogen bond formation. The energies of the halogen bonds are estimated by quantum-chemical calculations.

The reactions of SbI₃ with iodides of cations of the pyridinium family in a mixture of acetonitrile and acetone afford two polymeric iodoantimonate complexes: (1-MePy){[SbI₄]} (I) and (3-Br-1-MePy){[SbI₄]} (II). Specific features of the crystal structures are determined by X-ray diffraction (XRD). The thermal stability of compounds I and II is evaluated by thermogravimetry. The optical forbidden bandgaps are estimated from the diffuse reflectance spectra.

Complexes {(3,5-MePy)₂(CH₂)_n}₃[Bi₂Br₉]₂ (n = 2 (1), 5 (2)) are obtained by the reaction of bismuth oxide with salts of various doubly charged cations based on 3,5-dimethylpyridine in concentrated HBr, and they are structurally characterized by X-ray diffraction. The features of intermolecular contacts in the crystal structure are considered.