0000000000121534
AUTHOR
Otilia Costisor
Polynuclear copper(II) complexes with hexadentate Schiff base directed by the counter ion. Syntheses, crystal structures and magnetic properties
Abstract Four new complexes, [Cu 9 L 6 ( µ 3 -ClO 4 ) 2 ](ClO 4 ) 4 ·4CHCl 3 1 , [Cu 3 L 2 (H 2 O) 2 ](ClO 4 ) 2 ·3H 2 O 2 , [Cu 6 L 4 (N 3 ) 2 ](ClO 4 ) 2 3 and [Cu 2 L(CH 3 COO) 2 ] 4 , where H 2 L stands for the Schiff base N , N ′-bis[(2-hydroxybenzilideneamino)-propyl]-piperazine, were obtained and structurally characterized. Compounds 1 , 2 and 3 contain the Cu 3 L 2 2+ entities in which L 2− acts in an unsymmetrical mode with N 3 O donor set wrapped around marginal copper(II) and with the remained NO sets bound to the central copper ion. The marginal copper(II) ions are in distorted square pyramidal environment, whereas that of the central one is square planar. In 1 , the peripheral …
Synthesis, crystal structure and magnetic properties of [Cu(bipy)2(CH3COO)][Cu(bipy)2(Cr(C2O4)3)]·∼10.5H2O, the first compound containing the [Cr(C2O4)3]3− building block acting as a monodentate ligand
Abstract The reaction between copper(II) acetate with 2,2′-bipyridine and K3[Cr(C2O4)3] leads to the novel salt [Cu(bipy)2(CH3COO)][Cu(bipy)2(Cr(C2O4)3)]·∼10.5H2O, 1 (bipy=2,2′-bipyridine). The crystal structure of 1 consists of mononuclear cationic species [Cu(bipy)2(CH3COO)]+ and heterobinuclear anionic units, [Cu(bipy)2(Cr(C2O4)3)]−. The tris-oxalato-chromium entity behaves as a monodentate ligand toward the copper(II) ion within the complex anion. The distance between Cr(III) and Cu(II) across the bridging oxalato group is 5.056(2) A. The copper(II) ions exhibit a distorted trigonal bipyramidal surrounding in both cationic and anionic species. The π–π stacking interaction between bipy l…
Chemistry and Photochemistry of 2,6-Bis(2-hydroxybenzilidene)cyclohexanone. An Example of a Compound Following the Anthocyanins Network of Chemical Reactions
The kinetics and thermodynamics of the 2,6-bis(2-hydroxybenzilidene)cyclohexanone chemical reactions network was studied at different pH values using NMR, UV-vis, continuous irradiation, and flash photolysis. The chemical behavior of the system partially resembles anthocyanins and their analogue compounds. 2,6-Bis(2-hydroxybenzilidene)cyclohexanone exhibits a slow color change from yellow to red styrylflavylium under extreme acidic conditions. The rate constant for this process (5 × 10(-5) s(-1)) is pH independent and controlled by the cis-trans isomerization barrier. However, the interesting feature is the appearance of the colorless compound, 7,8-dihydro-6H-chromeno[3,2-d]xanthene, isolat…
CCDC 1558560: Experimental Crystal Structure Determination
Related Article: Ildiko Buta, Liliana Cseh, Carmen Cretu, Diana Aparaschivei, Catalin Maxim, Peter Lönnecke, Evamarie Hey-Hawkins, Nicolae Stanica, Eva Ohler, Eva Rentschler, Marius Andruh, Otilia Costisor|2017|Inorg.Chim.Acta|475|133|doi:10.1016/j.ica.2017.10.024
CCDC 1558856: Experimental Crystal Structure Determination
Related Article: Ildiko Buta, Liliana Cseh, Carmen Cretu, Diana Aparaschivei, Catalin Maxim, Peter Lönnecke, Evamarie Hey-Hawkins, Nicolae Stanica, Eva Ohler, Eva Rentschler, Marius Andruh, Otilia Costisor|2017|Inorg.Chim.Acta|475|133|doi:10.1016/j.ica.2017.10.024
CCDC 1006449: Experimental Crystal Structure Determination
Related Article: Artur J. Moro, Ana-Maria Pana, Liliana Cseh, Otilia Costisor, Jorge Parola, L. Cunha-Silva, Rakesh Puttreddy, Kari Rissanen, and Fernando Pina|2014|J.Phys.Chem.A|118|6208|doi:10.1021/jp505533b
CCDC 1558855: Experimental Crystal Structure Determination
Related Article: Ildiko Buta, Liliana Cseh, Carmen Cretu, Diana Aparaschivei, Catalin Maxim, Peter Lönnecke, Evamarie Hey-Hawkins, Nicolae Stanica, Eva Ohler, Eva Rentschler, Marius Andruh, Otilia Costisor|2017|Inorg.Chim.Acta|475|133|doi:10.1016/j.ica.2017.10.024
CCDC 1558561: Experimental Crystal Structure Determination
Related Article: Ildiko Buta, Liliana Cseh, Carmen Cretu, Diana Aparaschivei, Catalin Maxim, Peter Lönnecke, Evamarie Hey-Hawkins, Nicolae Stanica, Eva Ohler, Eva Rentschler, Marius Andruh, Otilia Costisor|2017|Inorg.Chim.Acta|475|133|doi:10.1016/j.ica.2017.10.024