Structure and magnetic behavior of a new 1-D compound with simultaneous end-on azido and carboxylato bridges. Unexpected strong ferromagnetic coupling for a Cu-N-Cu bond angle of 111.9 degrees as a consequence of ligand HOMOs countercomplementarity

被引：129
作者：
Escuer, A
Vicente, R
Mautner, FA
Goher, MAS
机构：
[1] GRAZ UNIV, INST PHYS & THEORET CHEM, A-8010 GRAZ, AUSTRIA
[2] UNIV ALEXANDRIA, FAC SCI, DEPT CHEM, ALEXANDRIA 21321, EGYPT
来源：
INORGANIC CHEMISTRY | 1997年 / 36卷 / 06期
关键词：
MAGNETOSTRUCTURAL CORRELATIONS; COPPER(II) COMPLEXES; CRYSTAL-STRUCTURES; NICKEL(II); CHAIN;
D O I：
10.1021/ic961107j
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The X-ray structure of the mu-carboxylate-mu(1,1)-azido-bridged compound {[Cu(Hpht)(N-3)]. H2O}(n) has been determined (Hpht = hydrogen phthalate). Crystal data: formula C8H7CuN3O5, monoclinic, P2(1)/m (No. 11), a = 7.383(3) Angstrom, b = 6.568(4) Angstrom, c = 10.659(4) Angstrom, beta = 93.38(3)degrees, Z = 2. The compound is found to be a system formed by chains of copper atoms bridged simultaneously by syn-syn carboxylato and end-on azido bridges. The copper chains are linked by a second carboxylato bridge, giving a 2-D compound. Magnetic measurements indicate strong ferromagnetic coupling, which affords a good example of unexpected magnetic properties due to the countercomplementarity of the superexchange pathways of the two ligands.
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页码：1233 / 1236
页数：4
相关论文
共 31 条
[1]  
[Anonymous], INT TABLES XRAY CRYS
[2]  
[Anonymous], J CHEM EDUC
[3]   HIGH-TEMPERATURE SERIES EXPANSIONS FOR SPIN-1-2 HEISENBERG MODEL BY METHOD OF IRREDUCIBLE REPRESENTATIONS OF SYMMETRIC GROUP [J].
BAKER, GA ;
RUSHBROOKE, GS ;
GILBERT, HE .
PHYSICAL REVIEW, 1964, 135 (5A) :1272-+
[4]   A NOVEL BIS(N,N'-DIMETHYL-1,4,7-TRIAZACYCLONONANE)CALIX[4]ARENE LIGAND THAT FORMS A FERROMAGNETIC DINUCLEAR NICKEL(II) COMPLEX WITH 3 END-ON AZIDE BRIDGING LIGANDS [J].
BEER, PD ;
DREW, MGB ;
LEESON, PB ;
LYSSENKO, K ;
OGDEN, MI .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1995, (09) :929-930
[5]  
Bencini A.Gatteschi., 1990, EPR of Exchange Coupled Systems
[6]   Exchange coupling in symmetrically syn,syn-mono(carboxylato)-bridged dinuclear copper(II) complexes [J].
Burger, KS ;
Chaudhuri, P ;
Wieghardt, K .
INORGANIC CHEMISTRY, 1996, 35 (09) :2704-2707
[7]   FERROMAGNETIC INTERACTIONS IN THE 1ST BIS(MU-END-ON-AZIDO)MANGANESE(II) DINUCLEAR COMPOUND - [MN(TERPY)(N3)2].2H2O [J].
CORTES, R ;
PIZARRO, JL ;
LEZAMA, L ;
ARRIORTUA, MI ;
ROJO, T .
INORGANIC CHEMISTRY, 1994, 33 (12) :2697-2700
[8]   MAGNETIC TRANSITION AND STRUCTURAL ASYMMETRIZATION IN THE FERROMAGNETIC COMPOUND [(NI-2(MEDPT)2(N-3)(2))(MU-(1,1-N-3)(2))], AN EXAMPLE OF A DYNAMIC SECOND-ORDER JAHN-TELLER EFFECT [J].
ESCUER, A ;
VICENTE, R ;
RIBAS, J ;
SOLANS, X .
INORGANIC CHEMISTRY, 1995, 34 (07) :1793-1798
[9]   Synthesis and structural characterization of [Mn(ethyl isonicotinate)(2)(N-3)(2)](n), a two-dimensional alternating ferromagnetic-antiferromagnetic compound. Magnetostructural correlations for the end-to-end pseudohalide-manganese system [J].
Escuer, A ;
Vicente, R ;
Goher, MAS ;
Mautner, FA .
INORGANIC CHEMISTRY, 1996, 35 (22) :6386-6391
[10]   Structure and magnetic behaviour of the first singly bridged nickel cyanate chain and a new dinuclear complex: An approximation to the superexchange mechanism for the nickel pseudohalide system [J].
Escuer, A ;
Vicente, R ;
ElFallah, MS ;
Solans, X ;
FontBardia, M .
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1996, (06) :1013-1019
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