Cobalt(II) complexes with disubstituted 3-aminopyrazole derivative: Mononuclear Co(II) complex with in situ prepared formamidine ligand
Nema prikaza
Autori
Leovac, Vukadin M.Tomić, Zoran D.
Kovacs, Attila
Joksović, Milan D.
Jovanović, Ljijana S.
Szecsenyi, Katalin Meszaros
Članak u časopisu
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
In the reaction of Co(NO3)(2) center dot 6H(2)O with 4-acetyl-3-amino-5-methylpyrazole (aamp) two octahedral Co(II) complexes, [Co(aamp)2(H2O)(4)](NO3)(2), 1, and [Co(ampf)(MeOH)(2)NO3]NO3 (ampf= N,N-bis(4-acetyl-5-metliylpyrazole-3-yl)formamidine), 2, were obtained, depending on the reaction conditions. The presence of water in the reaction system leads to incorporation of water molecules into the crystal lattice and I was formed. In all anhydrous environment, due to addition of CH(OEt)3, the fusion of two aamp) was induced through their NH2-groups, incorporating the methine group of CH(OEt)(3). As a result, complex 2, containing an adenino-mimetic NNO pharmacophore ligand, was obtained. The crystal and molecular structure of both compounds was determined. The coordination of aamp in I was achieved through N2 of the pyrazole ring. On the contrary, in 2, an unusual coordination mode of pyrazole is found: one of the pyrazole moieties, due to steric hindrance, coordinates through the oxy...gen atom of the acetyl group instead of N2. The complexes were characterized by elemental analysis and electronic spectra. For 2 a comprehensive IR spectral analysis is given. The metalligand interactions in 2 are analyzed by quantum chemical computations. The desolvation mechanism of both compounds is discussed in detail. (c) 2007 Elsevier B.V. All rights reserved.
Ključne reči:
cobalt(II) / 4-acetyl-3-amino-5-methylpyrazole / formamidine / FT-IR / DFT computationsIzvor:
Journal of Organometallic Chemistry, 2008, 693, 1, 77-86
DOI: 10.1016/j.jorganchem.2007.10.018
ISSN: 0022-328X
WoS: 000252600600010
Scopus: 2-s2.0-37049002823
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Leovac, Vukadin M. AU - Tomić, Zoran D. AU - Kovacs, Attila AU - Joksović, Milan D. AU - Jovanović, Ljijana S. AU - Szecsenyi, Katalin Meszaros PY - 2008 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3352 AB - In the reaction of Co(NO3)(2) center dot 6H(2)O with 4-acetyl-3-amino-5-methylpyrazole (aamp) two octahedral Co(II) complexes, [Co(aamp)2(H2O)(4)](NO3)(2), 1, and [Co(ampf)(MeOH)(2)NO3]NO3 (ampf= N,N-bis(4-acetyl-5-metliylpyrazole-3-yl)formamidine), 2, were obtained, depending on the reaction conditions. The presence of water in the reaction system leads to incorporation of water molecules into the crystal lattice and I was formed. In all anhydrous environment, due to addition of CH(OEt)3, the fusion of two aamp) was induced through their NH2-groups, incorporating the methine group of CH(OEt)(3). As a result, complex 2, containing an adenino-mimetic NNO pharmacophore ligand, was obtained. The crystal and molecular structure of both compounds was determined. The coordination of aamp in I was achieved through N2 of the pyrazole ring. On the contrary, in 2, an unusual coordination mode of pyrazole is found: one of the pyrazole moieties, due to steric hindrance, coordinates through the oxygen atom of the acetyl group instead of N2. The complexes were characterized by elemental analysis and electronic spectra. For 2 a comprehensive IR spectral analysis is given. The metalligand interactions in 2 are analyzed by quantum chemical computations. The desolvation mechanism of both compounds is discussed in detail. (c) 2007 Elsevier B.V. All rights reserved. T2 - Journal of Organometallic Chemistry T1 - Cobalt(II) complexes with disubstituted 3-aminopyrazole derivative: Mononuclear Co(II) complex with in situ prepared formamidine ligand VL - 693 IS - 1 SP - 77 EP - 86 DO - 10.1016/j.jorganchem.2007.10.018 ER -
@article{ author = "Leovac, Vukadin M. and Tomić, Zoran D. and Kovacs, Attila and Joksović, Milan D. and Jovanović, Ljijana S. and Szecsenyi, Katalin Meszaros", year = "2008", abstract = "In the reaction of Co(NO3)(2) center dot 6H(2)O with 4-acetyl-3-amino-5-methylpyrazole (aamp) two octahedral Co(II) complexes, [Co(aamp)2(H2O)(4)](NO3)(2), 1, and [Co(ampf)(MeOH)(2)NO3]NO3 (ampf= N,N-bis(4-acetyl-5-metliylpyrazole-3-yl)formamidine), 2, were obtained, depending on the reaction conditions. The presence of water in the reaction system leads to incorporation of water molecules into the crystal lattice and I was formed. In all anhydrous environment, due to addition of CH(OEt)3, the fusion of two aamp) was induced through their NH2-groups, incorporating the methine group of CH(OEt)(3). As a result, complex 2, containing an adenino-mimetic NNO pharmacophore ligand, was obtained. The crystal and molecular structure of both compounds was determined. The coordination of aamp in I was achieved through N2 of the pyrazole ring. On the contrary, in 2, an unusual coordination mode of pyrazole is found: one of the pyrazole moieties, due to steric hindrance, coordinates through the oxygen atom of the acetyl group instead of N2. The complexes were characterized by elemental analysis and electronic spectra. For 2 a comprehensive IR spectral analysis is given. The metalligand interactions in 2 are analyzed by quantum chemical computations. The desolvation mechanism of both compounds is discussed in detail. (c) 2007 Elsevier B.V. All rights reserved.", journal = "Journal of Organometallic Chemistry", title = "Cobalt(II) complexes with disubstituted 3-aminopyrazole derivative: Mononuclear Co(II) complex with in situ prepared formamidine ligand", volume = "693", number = "1", pages = "77-86", doi = "10.1016/j.jorganchem.2007.10.018" }
Leovac, V. M., Tomić, Z. D., Kovacs, A., Joksović, M. D., Jovanović, L. S.,& Szecsenyi, K. M.. (2008). Cobalt(II) complexes with disubstituted 3-aminopyrazole derivative: Mononuclear Co(II) complex with in situ prepared formamidine ligand. in Journal of Organometallic Chemistry, 693(1), 77-86. https://doi.org/10.1016/j.jorganchem.2007.10.018
Leovac VM, Tomić ZD, Kovacs A, Joksović MD, Jovanović LS, Szecsenyi KM. Cobalt(II) complexes with disubstituted 3-aminopyrazole derivative: Mononuclear Co(II) complex with in situ prepared formamidine ligand. in Journal of Organometallic Chemistry. 2008;693(1):77-86. doi:10.1016/j.jorganchem.2007.10.018 .
Leovac, Vukadin M., Tomić, Zoran D., Kovacs, Attila, Joksović, Milan D., Jovanović, Ljijana S., Szecsenyi, Katalin Meszaros, "Cobalt(II) complexes with disubstituted 3-aminopyrazole derivative: Mononuclear Co(II) complex with in situ prepared formamidine ligand" in Journal of Organometallic Chemistry, 693, no. 1 (2008):77-86, https://doi.org/10.1016/j.jorganchem.2007.10.018 . .