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Synthesis, Structure, and Magnetic Properties of a Dinuclear Antiferromagnetically Coupled Cobalt Complex
Author(s) -
Wu DaYu,
Huang Wei,
Wang Laiguo,
Wu Genhua
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100442
Subject(s) - cobalt , crystallography , chemistry , supramolecular chemistry , octahedron , stacking , deprotonation , antiferromagnetism , ion , stereochemistry , crystal structure , inorganic chemistry , physics , organic chemistry , condensed matter physics
Abstract A new dinuclear cobalt(II) compound,[(TPA*)Co II (DHBQ 2– )Co II (TPA*)] 2+ ( 1 2+ ) {TPA* =tris[(3, 5‐dimethyl‐pyrazol‐l‐yl)methyl] amine, DHBQ = deprotonated 2, 5‐dihydroxy‐1, 4‐benzoquinone}, was prepared and structurally and magnetically characterized. X‐ray crystallography revealed the centrosymmetric dinuclear divalent cobalt ions bridged by DHBQ 2– unit. The cobalt ions in the title compound have a distorted octahedral arrangement by coordination with four nitrogens of a TPA* and two oxygens of a bridging DHBQ unit. Due to the interdimer offset face‐to‐face π–π stacking in the crystallographic ac plane, the complex shows extended 2D supramolecular structure. Magnetic experiments showed the cobalt‐based dinuclear compound exhibits antiferromagnetic interactions with g = 2.35 and J / k B = –2.76 K, respectively.