Chiral cyanido-bridged Mn–Nb magnets including halogen-bonds

Three-dimensional cyanido-bridged bimetallic assemblies [Mn II (4-Xpy) 4 ] 2 [Nb IV (CN) 8 ]· n H 2 O (4-Xpy: 4-halopyridine; X = I and n = 0, ( 1 ); X = Cl and n = 0.5, ( 2 )) are synthesized. 1 and 2 have chiral and achiral structures, respectively. The chiral structure of 1 is composed of achiral...

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Bibliographic Details
Published inCrystEngComm Vol. 20; no. 45; pp. 7236 - 7241
Main Authors Ohno, Takuro, Nakabayashi, Koji, Imoto, Kenta, Komine, Masaya, Chorazy, Szymon, Ohkoshi, Shin-ichi
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 2018
Subjects
Bimetals
Crystal structure
Crystallography
Cyanides
Ferrimagnetism
Infrared radiation
Magnets
Manganese
Niobium
Temperature dependence
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Summary:Three-dimensional cyanido-bridged bimetallic assemblies [Mn II (4-Xpy) 4 ] 2 [Nb IV (CN) 8 ]· n H 2 O (4-Xpy: 4-halopyridine; X = I and n = 0, ( 1 ); X = Cl and n = 0.5, ( 2 )) are synthesized. 1 and 2 have chiral and achiral structures, respectively. The chiral structure of 1 is composed of achiral building blocks, which lead to an enantiopure compound through a spontaneous resolution process. In the crystal structure of 1 , the halogen bonds between 4-Ipy and cyanide distort the structure, lowering the crystal symmetry. Both 1 and 2 show ferrimagnetism with Curie temperatures ( T C ) of 22 K and 28 K, respectively. Due to the chiral and polar structure in the I 4 1 space group, 1 exhibits SHG phenomena, while such nonlinear optical phenomena are quenched in 2 due to its centrosymmetry.
ISSN:1466-8033
1466-8033
DOI:10.1039/C8CE01353E