Di-μ-iodido-bis[(dimethyl 2,2′-biquinoline-4,4′-dicarboxylate-κ² N,N′)copper(I)]

Abstract

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.004 Å; R factor = 0.027; wR factor = 0.065; data-to-parameter ratio = 20.0.In the centrosymmetric dinuclear title complex, [Cu 2 I 2 -(C 22 H 16 N 2 O 4 ) 2 ], the Cu I atom is coordinated in a distorted tetrahedral geometry by an N,N 0 -bidentate dimethyl 2,2 0 -biquinoline-4,4 0 -dicarboxylate ligand and two symmetryrelated I atoms, which act as bridges to a symmetry-related Cu I atom. The distance between the Cu I atoms within the dinuclear unit is 2.6723 (11) Å . Related literatureCopper(I) complexes are a subject of high interest and have been extensively studied during the past two decades because of their diversified photo-physical properties (Lavie-Cambot et al., 2008;Vorontsov et al., 2009;Hashimoto et al., 2011). The title complex is similar to other copper(I) complexes with halides and aromatic diimines: [Cu 2 I 2 (1,10-phenanthroline) 2 ] and Cu 2 X 2 (2,9-dimethyl-1,10-phenanthroline

Synthesis, crystal structure and Hirshfeld surface analysis of di-μ2-iodido-bis[(2,2′-biquinoline-κ2 N,N′)copper(I)]

“…The Cu atom is coordinated in a distorted tetrahedral geometry (Table 1) by two nitrogen atoms from the 2,2 0 -biquinoline ligands and the two 2 -bridged iodide ligands. The Cu1-I1 and Cu1 i -I1 distances [symmetry code: (i) Àx + 1, Ày, Àz + 1] are 2.5734 (2) and 2.6487 (2) A ˚, which are close to the distances in similar compounds (Sun et al, 2013;Starosta et al, 2012) with a substituted quinoline ligand. The Cu-N distances of 2.0930 (13) and 2.0900 (14) A ˚are almost equal within standard uncertainty.…”

“…Copper(I) bypiridine complexes are of interest because of their structural peculiarities, cuprophilic interactions, and important photochemical properties. Therefore, bypyridine-type systems are often the ligands of choice to explore new metal complexes with potentially useful properties (Ferraro et al, 2022;Starosta et al, 2012;Vatsadze et al, 2010). 2,2 0 -Biquinoline is an important and widely employed diimine ligand.…”

“…In IRIVIP (Vatsadze et al, 2010), n-hexyl carboxylate groups are attached to the quinoline rings at position 4. In YIJFAA, YIJFEE, and YIJFII (Sun et al, 2013), ethyl carboxylate fragments are attached, and in PAYKIL (Starosta et al, 2012), there are methyl carboxylate fragments. In IRIVIP and YIJFAA, instead of the iodine atom, as in the title structure, there are chlorine atoms; in YIJFEE, there are bromine atoms.…”