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Synthesis, Crystal Structures, and Magnetic Properties of Two Tetrahedral Mn II Mn III 3 Complexes
Author(s) -
Yang PeiPei,
Zhu LiLi,
Xu Yun,
Shao CongYing
Publication year - 2013
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.201300149
Subject(s) - perchlorate , crystallography , manganese , antiferromagnetism , chemistry , magnetic susceptibility , crystal structure , ion , ligand (biochemistry) , inorganic chemistry , physics , condensed matter physics , biochemistry , receptor , organic chemistry
Two tetranuclear manganese complexes, [NaMn II Mn 3 III (μ 4 ‐O 2– )(HL) 3 (SCN) 4 ] ( 1 ) and [NaMn II Mn 3 III (μ 4 ‐O 2– )(HL) 3 Cl 4 ][NaMn II Mn 3 III (μ 4 ‐O 2– )(HL) 3 Cl 3 (H 2 O)]ClO 4 · 3.5H 2 O ( 2 ) were obtained from the reaction of manganese perchlorate with a quadridentate Schiff base ligand, 3‐(2‐hydroxybenzylideneamino)propane‐1, 2‐diol (H 3 L) derived from condensation of 2‐hydroxybenzaldehyde with 3‐amino‐1, 2‐propanediol, as well as the coligand KSCN or NaCl under basic conditions. Single‐crystal X‐ray studies reveal that those two complexes all have a mixed‐valent tetrahedral core, which contains an apical Mn II ion and three basal Mn III ions situated in the [Mn 3 (μ 4 ‐O 2– )] 7+ equilateral triangle plane. Fitting of the magnetic susceptibility data to the theoretical χ m T vs. T expression, revealed that the presence of only antiferromagnetic interactions between the central metal atoms in 1 , while both antiferromagnetic and ferromagnetic interactions are present in 2 .