Pentagonal Bipyramidal First-Row Transition Metal Complexes with Macrocyclic Ligand Containing Two Pyridine-<i>N</i>-Oxide Pendant Arms: Structural, Magnetic, and Theoretical Studies.

ABSTRACT: A heptadentate 15-membered pyridine-based macrocyclic ligand containing two pyridine-N-oxide pendant arms (L4 = 3,12-bis((pyridine-1-oxide-2-yl)methyl)-6,9-dioxa-3,12,18-triazabicyclo[12.3.1]octadeca-1(18),14,16-triene) was synthesized together with its first-row transition metal complexes with the general formula [M(L4)](ClO₄)₂·1DMF (M^II = Mn (1), Fe (2), Co (3), and Ni (4); DMF = N,N'-dimethylformamide), which were thoroughly investigated. According to the obtained X-ray crystal structures, all complexes possess axially compressed pentagonal bipyramidal geometry with a coordination number of 7 for 1-3 or 5 + 2 for Ni(II) complex 4 with a large Jahn-Teller distortion. Fe(II

SUBMITTER: Drahos B 

PROVIDER: S-EPMC12648663 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature