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Pregled bibliografske jedinice broj: 704493

Chromium coordination compounds with bis(3, 5- dimethylpyrazol-1-yl)acetic acid or its anion


Kitanovski, Nives; Borsan, Nataša; Kasunič, M.; Francetič, Vojmir.; Popović, Jasminka; Djerdj, Igor; Rocquefelte, Xavier; Reedijk, J.; Kozlevčar, Bojan
Chromium coordination compounds with bis(3, 5- dimethylpyrazol-1-yl)acetic acid or its anion // Polyhedron, 70 (2014), 119-124 doi:10.1016/j.poly.2013.12.029 (međunarodna recenzija, članak, znanstveni)


Naslov
Chromium coordination compounds with bis(3, 5- dimethylpyrazol-1-yl)acetic acid or its anion

Autori
Kitanovski, Nives ; Borsan, Nataša ; Kasunič, M. ; Francetič, Vojmir. ; Popović, Jasminka ; Djerdj, Igor ; Rocquefelte, Xavier ; Reedijk, J. ; Kozlevčar, Bojan

Izvornik
Polyhedron (0277-5387) 70 (2014); 119-124

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

Ključne riječi
Catalysis; chromium(III); crystal structures; pyrazole

Sažetak
Wo chromium(III) coordination compounds synthesized from a solution of the tridentate (NON) ligand bis(3, 5-dimethylpyrazol-1-yl)acetic acid (HL = Hbdmpza), namely [Cr(L)2](H(NO3)2) (1) and [Cr(HL)Cl3] (2), are reported. The centrosymmetric central coordination sphere in compound 1 is fulfilled by two deprotonated ligands L- giving sterically closed coordination shell with pink-orange colored CrO2N4 chromophore. The coordination cation is accompanied by the dinitratohydrogenate(1-) counter anion. Contrary to compound 1, the compound 2 shows only one Hbdmpza ligand, which is protonated HL, though with the same three coordinate N, O, N atoms. Both title compounds 1 and 2 were isolated from the acetonitrile solution with the starting counter- anion remaining in the final product as a new counter anion H(NO3) 2 - in 1, or the coordinated chloride anions in 2 with green colored CrON2Cl3 chromophore. We were able to isolate the single crystals of 1, while only polycrystalline material for 2. Nevertheless, the crystal structure of 2 containing two octahedral coordination molecules in the asymmetric unit was determined via the combination of DFT calculations and the powder XRD analysis. Though both compounds reveal a mononuclear octahedral coordination motif, the catalytic accessibility of the compound 2, due to only one tridentate ligand L (HL) per one Cr(III) centre clearly promises more to this aspect.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Ustanove
Institut "Ruđer Bošković", 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


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