Syntheses, Crystal Structures, and Magnetic Properties of Two Cobalt(II) Coordination Complexes with 4'-Substituted 3,2':6',3''-Terpyridine Ligands

• Published in: Russian journal of coordination chemistry 2022-10, Vol.48 (10), p.659-666
• Main Authors: Dong, Y. J., Fu, W. W., Gui, S. Y., Liu, X., Zi, L. L., Wang, L. S.
• Format: Article
• Language: English
• Subjects: Antiferromagnetism; Chains; Chemical analysis; Chemistry; Chemistry and Materials Science; Cobalt; Coordination compounds; Crystal structure; Inorganic Chemistry; Ligands; Magnetic properties; Physical Chemistry; Single crystals; Trimesic acid
• ISSN: 1070-3284; 1608-3318
• DOI: 10.1134/S1070328422100013

Two new cobalt(II) coordination complexes [Co(Phtpy)(HBTC) 0.5 ] n · n H 2 O ( I ) and [Co(Meophtpy)(HBTC) 0.5 ] n · n H 2 O ( II ) (Phtpy = 4'-(4-phenyl)-3,2':6',3''-terpyridine, Meophtpy = 4'-(4-methoxyphenyl)-3,2':6',3''-terpyridine,H 3 BTC = trimesic acid) were synthesized under solvothermal conditions. The structures of complexes I , II have been characterized by elemental analysis, FT-IR, TG analysis, PXRD and single crystal X-ray diffraction techniques (CCDC nos. 2123289 ( I ) and 2123290 ( II )). For complex  I , a two-dimensional (2D) layered structure is formed parallel to the bc plane and the adjacent layers are connected by Phtpy ligand along a direction to form a three-dimensional (3D) structure. It is represented as 2-nodal (3, 5)-connected {4.6.8}{4.6 6 .8 3 } by Schläfli symbol. For complex  II , one-dimensional (1D) ladder chains along two almost perpendicular directions are formed and these chains are connected by Meophtpy ligands to form a 3D structure. It is represented as 2-nodal (3, 5)-connected {4 2 .6 5 .8 3 }{4 2 .6} by Schläfli symbol. In both complexes, dominant antiferromagnetic interactions between Co(II) ions were observed.