Synthesis and characterization of mixed-ligand coordination compounds of Ge(IV) with ethyl gallate and phenanthroline/bipyridine

Chem. Met. Alloys 18 (2025) 1-5

Mykola MARTYNIUK, Olena MARTSYNKO

https://doi.org/10.30970/cma18.0444

In this study, new coordination compounds of Ge(IV) with ethyl gallate (H₃EtGal) and the auxiliary nitrogen-donor ligands 1,10-phenanthroline (phen) and 2,2′-bipyridine (bipy) were synthesized. Based on elemental analysis, thermogravimetric data, IR spectroscopy, and mass spectrometry, the structures of the complexes [Ge(HEtGal)₂(phen)] (1) and [Ge(HEtGal)₂(bipy)] (2) were determined. In both compounds, germanium(IV) coordinates two hydroxyl groups from each ethyl gallate ligand and two nitrogen atoms from either phen or bipy, forming a distorted octahedral coordination polyhedron.

The structures of new coordination compounds.

Keywords

Germanium / Ethyl gallate / Coordination compounds / IR spectroscopy / ESI mass spectrometry