Crystal structure of bis(hydroxydi(pyridin-2-yl)methanolato-κ³ N,N′,O)cobalt(III) perchlorate dihydrate, C₂₂H₂₂ClCoN₄O₁₀

Abstract

CCDC no.: 1565197The asymmetric unit of the title crystal structure is shown in the figure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters. (18.4 mg, 0.1 mmol) in 3 mL MeCN with stirring. The resulting mixture was placed in the dark, and red crystals were obtained after two weeks, in a yield of 46% (based on Co). Source of materials Experimental detailsHydrogen atoms potentially involved in hydrogen-bonding interactions were located by difference methods and their positional and isotropic displacement parameters were refined. Other H atoms were included in the refinement at calculated positions [C-H aromatic = 0.93 Å] and treated as riding models with U iso (H) = 1.2Ueq(C). CommentThe bis(2-pyridyl)ketone and its derivative di(pyridin-2-yl)methanediol (H 2 L), and the anionic HL − have been widely used as multidentate and chelating ligands to exhibit a variety of coordination modes [3][4][5][6][7][8].The title structure is made up of cations of [Co(HL) 2 ], one perchlorate anion and two water molecules. The central metal Co(III) ion is sixfold coordinated by two oxygen atoms and four nitrogen atoms from two HL − . The cation of the title complex is similar in structure to a Fe(III) complex of tridentate HL − ligand [9]. In title complex, the bond lengths of Co-O are 1.8862(12) Å and 1.8908(12) Å, and the Co-N bond distances are in the range of 1.9141(16)-1.9309(15) Å, which are comparable to other Co(III) complexes [10,11]. In the crystal structure, the cations are interlinked by hydrogen bonds and π-π interactions to form a 3D supramolecular structure.

Crystal structure of bis(hydroxydi(pyridin-2-yl)methanolato-κ3 N,N′O)cobalt(III) 7,7,8,8-tetracyanoquinodimethane, C34H22CoN8O4

“…The central metal Co(III) ion is sixfold coordinated by two oxygen atoms and four nitrogen atoms from two HL − ligands. The cation of the title complex is same as our previous report [6]. In title complex, the bond length of Co-O is 1.8809(15) Å, and the Co-N bond distances are in the range of 1.9214(19)-1.9255(18) Å, which are in excellent agreement with those in other Co(III) complexes [7].…”