(2,9-Dimethyl-1,10-phenanthroline-κ²N,N′)bis(2-hydroxybenzoato-κO)copper(II)

Abstract

Key indicators: single-crystal X-ray study; T = 291 K; mean (C-C) = 0.006 Å; R factor = 0.045; wR factor = 0.121; data-to-parameter ratio = 13.2.The Cu II atoms in the two independent molecules of the title compound, [Cu(C 7 H 5 O 3 ) 2 (C 14 H 12 N 2 )], are each coordinated by a bidentate 2,9-dimethyl-1,10-phenanthroline (dmphen) molecule and two monodentate 2-hydroxybenzoate anions in a distorted tetrahedral geometry. The crystal packing is stabilized by intramolecular hydrogen bonding andinteractions between the dmphen rings of neighboring molecules, with distances between their ring planes of 3.5670 (4) and 3.5181 (9) Å . Related literature

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“…Instead a four-coordinate complex is envisaged with the copper(II) centre bound to the bathocuproinedisulfonic acid disodium moiety via two nitrogen atoms and to two indomethacin units via monodentate interactions (as depicted in Figure 1). Indeed, copper(II) complexes with two 2,9-dimethyl-1,10-phenanthroline ligands, or one 2,9-dimethyl-1,10-phenanthroline ligand and two monodentate ligands have been reported to adopt distorted tetrahedral structures [19,20,21]. The presence of the disulfonic acid disodium groups promotes water solubility, therefore as well as being more stable towards biological reduction (than 1 ), 2 is expected to be more hydrophilic (than 1 ) and thus more suitable for in vivo administration and drug formulation.…”

Synthesis and structural features of copper(II) complexes of N,N,N′,N′-tetramethylethylenediamine with 2-chlorobenzoate1− and 2-hydroxybenzoate1−

“…Cu(phen)2(Hsal)]. [Hsal][H2O]},[9], dimeric {[Cu2(phen)2(sal)2]•2H2O}[9] and polymeric forms[13] depending on the nature of ligands, and reaction conditions such as temperature, pH, solvent system etc[14][15]. The carboxylate moiety being coordinatively flexible, can assume monodentate, bidentate, or bridging coordination modes.…”