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Valence‐Ordering Structures and Magnetic Behavior of Metallic MMX Chain Compounds
Author(s) -
Mitsumi Minoru,
Kitamura Kouhei,
Morinaga Ayumi,
Ozawa Yoshiki,
Kobayashi Mototada,
Toriumi Koshiro,
Iso Yasuhito,
Kitagawa Hiroshi,
Mitani Tadaoki
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020802)41:15<2767::aid-anie2767>3.0.co;2-x
Subject(s) - mmx , antiferromagnetism , valence (chemistry) , condensed matter physics , valence bond theory , singlet state , chemistry , crystal structure , ground state , magnetic susceptibility , crystallography , materials science , physics , atomic physics , molecule , molecular orbital , organic chemistry , computer science , excited state , operating system
Chains change : Novel valence‐ordering structures of the ground states of MMX chain compounds, [Pt 2 (RCS 2 ) 4 I] ∞ ( 1 : R= n Bu, 2 : R=Et), are determined by low‐temperature crystal‐structure analyses to be ‐Pt 2+ ‐Pt 3+ ‐I − ‐Pt 3+ ‐Pt 2+ ‐I − ‐. Magnetic susceptibility measurements of 1 (see graph) revealed an abrupt drop in magnitude from a 1D antiferromagnetic spin system to a spin‐singlet state accompanying a first‐order phase‐transition around 210 K. This result is in contrast to the spin degree of freedom of 2 that survived down to 2 K.