Aqua(dicyanamido-κN¹)(2,9-dimethyl-1,10-phenanthroline-κ²N,N′)(nitrato-κ²O,O′)cobalt(II)–2,9-dimethyl-1,10-phenanthroline–water (2/1/2)

Abstract

2 O, the Co II ion is coordinated by a bidentate 2,9-dimethyl-1,10-phenanthroline (dmphen) ligand, a bidentate nitrate anion, a water molecule and a monodentate dicyanamide group in a distorted octahedral geometry. One uncoordinated dmphen molecule is situated on a crystallographic twofold axis and the asymmetric unit is completed by one water molecule. In the crystal, molecules form a onedimensional framework in the [001] direction through O-HÁ Á ÁN and O-HÁ Á ÁO hydrogen bonds. The crystal packing is further stabilized by -stacking interactions between the dmphen rings of neighboring molecules, with a centroidcentroid separation of 3.5641 (8) Å and a partially overlapped arrangement of parallel dmphen rings with a distance of 3.407 (2) Å . Related literature

Probing the effects of steric bulk on the solution-phase behaviour and redox chemistry of cobalt-diimine complexes

“…The chelating nitrate again displays a fairly acute bite angle (O201−Co1−O202 = 59.80 (6)°), as also observed inthe cation. Through a search of the CSD, we were able to identify only two structures containing both a neocuproine ligand and a bidentate nitrate ligand around a cobalt centre(47,48). Both of these display similar chelating nitrate and diimine bond angles about cobalt, with Co−N and Co−O bond lengths in broad agreement with those we report here (including an asymmetry in the Co−O distances).…”