Naslov
The Oxalate-bridged Antiferromagnetically Coupled [Cu^IICu^II] and [Ni^IINi^II] Systems

Autori
Planinić, Pavica ; Jurić, Marijana ; Brničević, Nevenka ; Milić, Dalibor ; Pajić, Damir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
38th International Conference on Coordination Chemistry : Book of Abstracts / - , 2008, 327-327

Skup
International Conference on Coordination Chemistry (38 ; 2008)

Mjesto i datum
Jeruzalem, Izrael, 20.07.2008. - 25.07.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
oxalate-bridged ; crystal structure ; magnetic susceptibility ; antiferromagnetic

Sažetak
In the rational approaches to the design and synthesis of various metal-organic coordination networks with specific chemical and physical properties, a key role belongs to the nature of the metal ion and the geometry, flexibility and coordination preferences of the bridging ligands. The oxalate C_2O_4^2– anion, having rich binding facilities and capabilities of mediating exchange interaction between the metal centres, has appeared as a very useful bridging ligand in the synthesis of a variety of homo- and heterometallic compounds with attractive new architectures and interesting magnetic properties. As a continuation of our research work on polynuclear transition metal complexes, two novel oxalate-bridged species have been synhesized: a homodinuclear Cu^IICu^II complex, [Cu(bpy)Cl(µ -C_2O_4)Cu(bpy)Cl] (1) (bpy = 2, 2'-bipyridine) and a heterometallic Ni, Nb compound, containing homodinuclear Ni^IINi^II units, [{; Ni(bpy)_2}; _2(μ -C_2O_4)]_3[NbO(C_2O_4)_3]_2• 24H_2O (2). The new compounds have been characterized by means of chemical and TG/DTA analysis, infrared spectroscopy, magnetic susceptibility measurements and by single crystal X-ray diffraction method. Each copper(II) atom in 1 displays a square-pyramidal coordination, whereas nickel(II) atoms in 2 are placed in a slightly distorted octahedral environment. The analysis of magnetic susceptibility data (1.8– 290 K) reveals the existence of antiferromagnetic exchange interaction between the metal centres in oxalate-bridged units of 1 and 2.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA