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Synthesis, Structures, and Magnetic Properties of Chiral One‐dimensional Cr III ‐Mn III Heterobimetallic Complexes Based on [(Tp)Cr(CN) 3 ] –
Author(s) -
Yao MinXia,
Deng XiaoWei,
Zhu ZhaoXia
Publication year - 2016
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.201500627
Subject(s) - antiferromagnetism , crystallography , spin canting , chemistry , cyanide , zigzag , enantiomer , stereochemistry , inorganic chemistry , physics , magnetization , geometry , mathematics , quantum mechanics , magnetic field , condensed matter physics
Two Cr III ‐Mn III heterobimetallic compounds, [Mn(( R , R )‐5‐MeOSalcy)Cr(Tp)(CN) 3 · 2CH 3 CN] n ( 1‐ RR ) and [Mn(( S , S )‐5‐MeOSalcy)Cr(Tp)(CN) 3 ·2CH 3 CN] n ( 1‐ SS ) [Salcy = N , N ′‐(1,2‐cyclohexanediylethylene)bis(salicylideneiminato) dianion], were synthesized by using the tricyanometalate building block, [(Tp)Cr(CN) 3 ] – [Tp = tris(pyrazolyl) hydroborate] and chiral Mn III Schiff base precursors. Structural analyses and circular dichroism (CD) spectra revealed that 1‐ RR and 1‐ SS are a pair of enantiomers containing a neutral cyano‐bridged zigzag chain with (–Cr–C≡N–Mn–N≡C–) n as the repeating unit. Magnetic studies show that antiferromagnetic couplings between Cr III and Mn III ions occur by cyanide bridges. 1‐ RR and 1‐ SS present metamagnetic, spin‐canting, and antiferromagnetic order behaviors at low temperatures.