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Various coordination modes in mercury(II) complexes with quinoline-2-carboxylic acid. Preparation and structural characterization


Soldin, Željka; Matković-Čalogović, Dubravka; Pavlović, Gordana; Popović, Jasminka; Vinković, Marijana; Vikić-Topić, Dražen; Popović, Zora
Various coordination modes in mercury(II) complexes with quinoline-2-carboxylic acid. Preparation and structural characterization // Polyhedron, 28 (2009), 13; 2735-2743 doi:10.1016/j.poly.2009.05.040 (međunarodna recenzija, članak, znanstveni)


Naslov
Various coordination modes in mercury(II) complexes with quinoline-2-carboxylic acid. Preparation and structural characterization

Autori
Soldin, Željka ; Matković-Čalogović, Dubravka ; Pavlović, Gordana ; Popović, Jasminka ; Vinković, Marijana ; Vikić-Topić, Dražen ; Popović, Zora

Izvornik
Polyhedron (0277-5387) 28 (2009), 13; 2735-2743

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

Ključne riječi
Mercury(II) complexes ; quinoline-2-carboxylic acid ; X-ray single crystal structure analysis ; NMR spectroscopy

Sažetak
Several mercury(II) complexes of 2-quinaldic acid (quinH ; IUPAC name: quinoline-2-carboxylic acid) were synthesized and characterized. [Hg(quin)_2(OH2)] (1) was obtained as the reaction product of mercury(II) chloride and 2-quinaldic acid in an aqueous media, while a mixture of 1, [(quinH_2)(HgCl_3)]• 2quinH• H_2O (2), and [Hg(quin)_2(EtOH)]• H_2O (3) was obtained from a 96% ethanol solution. Pure [HgCl(quin)(quinH)] (4) was obtained as the first reaction product when the reaction was performed in absolute alcohol. After isolation of 4 from the filtrate the mixture of 1, 2, and 3 was again obtained. The X-ray single-crystal structure analysis reveals that the ligand, 2-quinaldic acid is coordinated to the Hg2+ ion as a N, O-chelating quinaldate ion in structures 1, 3 and 4. In the structure of 2 polymeric (HgCl_3)_n^n- anions are formed with a very deformed trigonal-bipyramidal 3+2 mercury coordination sphere while the ligand, 2-quinaldic acid exists in the zwitterionic form as quinH, and as a cation, quinH^2+. The coordination polyhedron in 1 and 4 can be described as 2+3 and 4+1 deformed trigonal-bipyramidal and square-pyramidal geometry with the water molecule and chlorine atom at the fifth site in 1 and 4, respectively. The coordination sphere in 3 is square pyramidal with the ethanol molecule at the vertex, however through additional Hg • O contacts centrosymmetric dimers are formed resulting in a 5+1 effective octahedral mercury coordination. The crystal structures of 1-4 are characterized by O-H• O and N-H• O intermolecular hydrogen bonds forming various packing motifs, which are discussed in details.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982929-2917 - Spektroskopija NMR i modeliranje bioaktivnih molekula (Dejan Plavšić, )
119-1193079-1084 - Strukturno istraživanje bioloških makromolekula metodom rentgenske difrakcije (Dubravka Matković-Čalogović, )
119-1193079-1332 - Kemija metalnih kompleksa u reakcijama od biološkog značaja i novim materijalima (Zora Popović, )

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


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