Methyl- and methoxysalicylatocopper complexes with 2-pyridylmethanol: Synthesis, spectral properties, structure and EPR characterization in solid-state and in solution

• Published in: Central European journal of chemistry Vol. 10; no. 5; pp. 1506 - 1515
• Main Authors: Repická, Zuzana, Puchoňová, Miroslava, Husáriková, Lucia, Monco, Jan, Koman, Marián, Mazúr, Milan, Valigura, Dušan
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Versita 01.10.2012; Versita; De Gruyter
• Subjects: 2-Pyridylmethanol; Biochemistry; Biological and Medical Physics; Biophysics; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Copper(II) complex; Crystal structure; Geochemistry; Research Article; Salicylate; Copper(II) complex; Salicylate; 2-Pyridylmethanol; Crystal structure
• ISSN: 1895-1066; 2391-5420; 1644-3624; 2391-5420
• DOI: 10.2478/s11532-012-0065-7

The syntheses and characterizations of salicylatocopper(II) complexes of the formula Cu(X-sal) 2 (2-pyme) 2 (X = 3-MeO ( 1 ), 4-MeO ( 2 ), 3-Me ( 3 ), 4-Me ( 4 ) and 5-Me ( 5 ), where 3-MeOsal − = 3-methoxysalicylate, 4-MeOsal − = 4-methoxysalicylate, 3-Mesal − = 3-methylsalicylate, 4-Mesal − = 4-methylsalicylate, 5-Mesal − = 5-methylsalicylate anion, and 2-pyme = 2-pyridylmethanol) are reported. The composition was determined by elemental analysis, and ligand coordination modes have been determined by spectroscopic methods (IR, UV-VIS). The crystal structure determination of [Cu(3-MeOsal) 2 (2-pyme) 2 ] ( 1 ) and [Cu(5-Mesal) 2 (2-pyme) 2 ] ( 5 ) have confirmed conclusions originally based on spectral data. EPR measurements of frozen water/methanol solutions containing different copper(II): 2-pyme molar ratios have indicated presence of complexes with only two nitrogen donor atoms bonded to each central atom.