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Supramolecular motifs and solvatomorphism within the compounds containing [M(bpy)_3]^2+ entities: [M(bpy)_3]_2[NbO(C_2O_4)_3]Cl• nH_2O (M = Fe^2+, Co^2+, Ni^2+, Cu^2+ and Zn^2+ ; bpy = 2, 2'-bipyridine ; n = 11, 12). Syntheses, structures and magnetic properties


Jurić, Marijana; Perić, Berislav; Brničević, Nevenka; Planinić, Pavica; Pajić, Damir; Zadro, Krešo; Giester, Gerald; Kaitner, Branko
Supramolecular motifs and solvatomorphism within the compounds containing [M(bpy)_3]^2+ entities: [M(bpy)_3]_2[NbO(C_2O_4)_3]Cl• nH_2O (M = Fe^2+, Co^2+, Ni^2+, Cu^2+ and Zn^2+ ; bpy = 2, 2'-bipyridine ; n = 11, 12). Syntheses, structures and magnetic properties // Dalton Transactions, 2008 (2008), 6; 742-754 (međunarodna recenzija, članak, znanstveni)


Naslov
Supramolecular motifs and solvatomorphism within the compounds containing [M(bpy)_3]^2+ entities: [M(bpy)_3]_2[NbO(C_2O_4)_3]Cl• nH_2O (M = Fe^2+, Co^2+, Ni^2+, Cu^2+ and Zn^2+ ; bpy = 2, 2'-bipyridine ; n = 11, 12). Syntheses, structures and magnetic properties

Autori
Jurić, Marijana ; Perić, Berislav ; Brničević, Nevenka ; Planinić, Pavica ; Pajić, Damir ; Zadro, Krešo ; Giester, Gerald ; Kaitner, Branko

Izvornik
Dalton Transactions (1477-9226) 2008 (2008), 6; 742-754

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Transition metal complexes; 2; 2'-bipyridine; tris(oxalato)oxoniobate(V); synthesis; crystal structures; solvatomorphism; quadruple aryl embrace (QAE) contact; magnetic susceptibility measurements

Sažetak
Solvatomorphism has been found between two series of complexes of the composition [M(bpy)_3]_2[NbO(C_2O_4)_3]Cl• nH_2O [M = Fe^2+ (1, 2), Co^2+ (3, 4), Ni^2+ (5, 6), Cu^2+ (7) and Zn^2+ (8, 9) ; bpy = 2, 2'-bipyridine)], crystallizing in the monoclinic space group P21/c [3, 5, 8 (n = 11)] or in the orthorhombic space group P212121 [2, 4, 6, 7 (n = 12)]. All the structures contain two symmetry independent [M(bpy)_3]^2+ cations, one [NbO(C_2O_4)_3]^3– anion, one Cl^– anion, and crystal water molecules. The cations possess a trigonally distorted octahedral geometry, with an additional tetragonal distortion in 7. Analysis of crystal packing reveals a specific type of supramolecular contact comprising four bipyridine ligands from two neighbouring [M(bpy)_3]^2+ cations – quadruple aryl embrace (QAE) contact. The contact is realized by the alignment of two molecular two-fold rotation axes, preserving the parallel orientation of the molecular three-fold rotation axes. The resulting two-dimensional honeycomb lattices of [M(bpy)_3]^2+ cations are placed between the hydrogen bonding layers made of [NbO(C_2O_4)_3]^3– and Cl^– anions and the majority of crystal water molecules. The temperature-dependent magnetic susceptibility measurements (1.8– 300 K) show a significant orbital angular momentum contribution for 3 and 4 (high-spin Co^2+), the influence of zero-field splitting for 5 and 6 (Ni^2+) and a substantially paramagnetic Curie behaviour for the Cu^2+ compound (7).

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2946 - Višenuklearni metalni sustavi: sinteza i svojstva (Berislav Perić, )
119-1191458-1017 - Nanomagneti (Krešo Zadro, )
119-1193079-3069 - Novi organski i koordinacijski spojevi - sinteza i suodnos struktura-svojstvo (Branko Kaitner, )

Ustanove
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE