COOPERATIVE JAHN-TELLER ORDERING AND MAGNETIC-STRUCTURE - PYRIDINE-N-OXIDE COMPLEXES OF CU2+-CU(ONC5H5)6X2[X=C10-4,BF-4]

被引：28

作者：

REINEN, D ^{[1
]}

KRAUSE, S ^{[1
]}

机构：

[1] UNIV MARBURG,FACHBEREICH CHEM,D-3550 MARBURG,FED REP GER

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 29卷 / 10期

关键词：

D O I：

10.1016/0038-1098(79)91008-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Pyridine-N-oxide complexes CuL6X2 [L: C5H5NO ; X: BF-4(I), ClO-4(II)] with trigonal unit cells at 298 K and CuL62+ octahedra in approximately cubic primitive arrangement exhibit dynamic to static Jahn-Teller phase transitions to pseudopetragonal modifications at ≈ 90 K (I) and below 70 K (II). It found by single crystal and powder EPR-spectroscopy, that the low-temperature β-phases are characterised by a cooperative Jahn-Teller order of elongated CuO6-octahedra, which is ferrodistortive (I) and antiferrodistortive (II) respectively. These orbital order patterns are in agreement with the symmetries of the magnetic structures found for the two complexes. © 1979.

引用

页码：691 / 699

页数：9

共 29 条

[1]

ALGRA HA, 1977, 433A KAM ONN LAB COM

[2] PRESENCE OF A STATIC JAHN-TELLER DISTORTION IN COPPER(II) TERPYRIDINE COMPLEXES .1. CRYSTAL-STRUCTURE OF CU(TERPY)2(NO3)2 [J].

ALLMANN, R ;

HENKE, W ;

REINEN, D .

INORGANIC CHEMISTRY, 1978, 17 (02) :378-382

[3]

AMMETER J, INORG CHEM

[4] CRYSTAL AND MOLECULAR-STRUCTURE OF HEXAKIS(PYRIDINE N-OXIDE) COBALT(II) PERCHLORATE [J].

BERGENDAHL, TJ ;

WOOD, JS .

INORGANIC CHEMISTRY, 1975, 14 (02) :338-342

[5] JAHN-TELLER DISTORTIONS OF TRIS(ETHYLENEDIAMINE)COPPER(II) COMPLEXES [J].

BERTINI, I ;

GATTESCHI, D ;

SCOZZAFAVA, A .

INORGANIC CHEMISTRY, 1977, 16 (08) :1973-1976

[6]

BERTINI I, 1978, 2 P 19 ICCC PRAG, P14

[7]

BOER ED, 1978, 2 P 19 ICCC PRAG, P17

[8] TRANSITION METAL COMPLEXES OF PYRIDINE N-OXIDE [J].

CARLIN, RL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1961, 83 (18) :3773-+

[9] DO CU2+-IONS IN TETRAGONALLY COMPRESSED OCTAHEDRA EXIST [J].

FRIEBEL, C ;

REINEN, D .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1974, 407 (02) :193-200

[10] JAHN-TELLER INDUCED PHASE-TRANSITIONS IN HEXANITROCUPRATES A2PBCU(NO2)6 [A=K,RB,CS] [J].

FRIEBEL, C .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1975, 417 (03) :197-212

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