A heptanuclear Fe(II)-Fe(III)6 system with twelve unpaired electrons

被引:57
作者
Gembicky, M
Boca, R [1 ]
Renz, F
机构
[1] Slovak Univ Technol Bratislava, Dept Inorgan Chem, SK-81238 Bratislava, Slovakia
[2] Johannes Gutenberg Univ Mainz, Inst Inorgan & Analyt Chem, D-55099 Mainz, Germany
关键词
heptanuclear iron complex; high-spin molecule; iron(II)-iron(III) mixed valence; magnetic susceptibility; Mossbauer spectra;
D O I
10.1016/S1387-7003(00)00160-X
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The pentadentate ligand (LH2)-L-5 = saldptn = N,N'-bis(1-hydroxy-2-benzyliden)-1,7-diamino-4-azaheptane has been prepared by a Schiff base condensation between 1,7-diamino-4-azaheptane and the corresponding salicyaldehyde. Its complexation with Fe(III) gave the high-spin (S = 5/2) complex of [Fe-III(L-5)Cl]. This precursor was combined with [Fe(CN)(6)](4-) and a blue heptanuclear complex [Fe-II{(CN)Fe-III(L-5)}(6)]Cl-2 resulted. This system belongs to the class of high-spin molecules possessing twelve unpaired electrons (S = 6) as proven by the magnetic susceptibility measurements and Mossbauer spectra. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:662 / 665
页数:4
相关论文
共 22 条
[1]   CRYSTAL AND MOLECULAR-STRUCTURE AND MAGNETIC-PROPERTIES OF A TRINUCLEAR COMPLEX CONTAINING EXCHANGE-COUPLED GDCU2 SPECIES [J].
BENCINI, A ;
BENELLI, C ;
CANESCHI, A ;
DEI, A ;
GATTESCHI, D .
INORGANIC CHEMISTRY, 1986, 25 (04) :572-575
[2]   Spin crossover in mononuclear and binuclear iron(III) complexes with pentadentate Schiff-base ligands [J].
Boca, R ;
Fukuda, Y ;
Gembicky, M ;
Herchel, R ;
Jarosciak, R ;
Linert, W ;
Renz, F ;
Yuzurihara, J .
CHEMICAL PHYSICS LETTERS, 2000, 325 (04) :411-419
[3]   Spectroscopic and magnetic properties and structure of a five-coordinate, O2-binding cobalt(II) Schiff base complex and of the copper(II) analogue [J].
Boca, R ;
Elias, H ;
Haase, W ;
Huber, M ;
Klement, R ;
Muller, L ;
Paulus, H ;
Svoboda, I ;
Valko, M .
INORGANICA CHIMICA ACTA, 1998, 278 (02) :127-135
[4]  
Boca R., 1999, Theoretical foundations of molecular magnetism
[5]   STRUCTURAL EFFECT OF ADDING PAIRED AND UNPAIRED ELECTRONS TO OTHERWISE IDENTICAL TRANSITION-METAL SYSTEMS - RELATION BETWEEN MAGNETIC AND STRUCTURAL-PROPERTIES IN IRON(III) COMPLEXES, OBSERVATION OF A NEW INTERMEDIATE IRON(III) SPIN (S=3/2) STATE, AND STRUCTURES OF BENZENE SOLVATED TRIS(4-MORPHOLINECARBODITHIOATO-S,S')CHROMIUM(III), -IRON(III), -COBALT(III), -RHODIUM(III), AND -IRIDIUM(III)( [J].
BUTCHER, RJ ;
SINN, E .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1976, 98 (09) :2440-2449
[6]   ALTERNATING-CURRENT SUSCEPTIBILITY, HIGH-FIELD MAGNETIZATION, AND MILLIMETER BAND EPR EVIDENCE FOR A GROUND S = 10 STATE IN [MN12O12(CH3COO)16(H2O)4].2CH3COOH.4H2O [J].
CANESCHI, A ;
GATTESCHI, D ;
SESSOLI, R ;
BARRA, AL ;
BRUNEL, LC ;
GUILLOT, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1991, 113 (15) :5873-5874
[7]   Spin density distribution in transition metal complexes: Some thoughts and hints [J].
Cano, J ;
Ruiz, E ;
Alvarez, S ;
Verdaguer, M .
COMMENTS ON INORGANIC CHEMISTRY, 1998, 20 (01) :27-56
[8]  
GADET V, 1991, NATO ADV SCI I E-APP, V198, P281
[9]  
Gatteschi D, 1996, NATO ADV SCI INST SE, V321, P141
[10]  
Gatteschi D, 1996, ACS SYM SER, V644, P157