Facile synthesis of Cu(II) complexes of mono- and bicondensed N donor Schiff base 1H-pyrazolate ligands: Crystal structures, spectroscopic and magnetic properties

Crystal structure, characterization and magnetic properties of a 1D copper(II) polymer incorporating a Schiff base with carboxylate side arm

“…The presence of an electron withdrawing chlorine substituent in the ligand backbone of the complex may be responsible for strengthening the association of the two copper(II) ions in the asymmetric unit. 38 This is also evident from the slightly shorter Cu· · · Cu separation (5.2650(10) Å) in the polymeric chain compared to the separations of 5.2827 (19) Å in the complex reported earlier. 26 …”

“…Amino acid-based Schiff bases, a class of the Schiff bases with carboxylate side arm, and their metal complexes were synthesized and studied extensively for their wide applications in biology, pharmacy and industry. [12][13][14][15][16][17][18][19][20][21][22][23][24][25] However, little focus has been given to the class of amino acid Schiff bases obtained by condensation of carbonyl compounds and aromatic amines with carboxylic acid side arm in spite of bearing similar free carboxylate end which is considerably flexible from the point of view of the steric orientation in the formation of less strained covalent bonds with the metal centers with potential to show versatile bridging modes.…”

(3-Acetyl-4-methyl-1H-pyrazol-1-ide-5-carboxylato)bis(1,10-phenanthroline)nickel(II) 3.5-hydrate

“…The bridging nature of pyrazolate provides the possibility to bring metal ions into close proximity, which results in arrays with interesting magnetic and catalytic properties (Klingele et al, 2009;Malinkin et al, 2012b;Ng et al, 2011).…”

(3-Acetyl-5-carboxylato-4-methyl-1H-pyrazol-1-ido-κ2N1,O5)aqua[(pyridin-2-yl)methanamine-κ2N,N′]copper(II)

“…For applications of related pyrazoles, see: Sachse et al (2008); Penkova et al (2009). For synthetic and structural studies of 3,5-disubstituted 1H-pyrazoles and their metal complexes, see: Malinkin et al (2011Malinkin et al ( , 2012. For related structures, see: Fritsky et al…”

“…Herein we report the molecular and crystal structures of the title compound ( Fig. 1) obtained in the framework of our synthetic and structural study of unsymmetrical 3,5-disubstituted pyrazolate ligands (Malinkin et al, 2011(Malinkin et al, , 2012. and Cu-O are typical for square-pyramidal Cu(II) complexes with the amine, deprotonated pyrazolate and carboxylate donors (Sliva et al, 1997;Kanderal et al, 2005).…”