Crystal structure of trans-bis((E)-7-oxo-4-(phenyldiazenyl)cyclohepta-1,3,5-trien-1-olato)-κ² O,O′)-bis(pyridine-κN)cobalt(II), C₃₆H₂₈CoN₆O₄

Abstract

The crystal structure is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters. Source of materialThe reagents available commercially were used without further purification. 5-(Phenyldiazenyl)tropolone was synthesized according to the previously published method [3]. 5-(Phenyldiazenyl)tropolone (452 mg, 2.0 mmol) and pyridine (162 µL, 2.0 mmol) were added to a solution of Co(CH 3 COO) 2 ·4H 2 O (249 mg, 1.0 mmol) in EtOH:H 2 O (40 ml, 1:1). The solution was refluxed (110°C) for 7 days, filtered and allowed to crystallize. Crystals were obtained from the slow evaporation of the solution at room temperature (81% yield) within 2 weeks. Experimental detailsMethyl H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms, with C-H = 0.95 Å and U iso (H) = 1.2 Ueq(C). The highest (0.39e Å −3 ) and lowest (−0.30e Å −3 ) residual electron density peaks were located respectively at 0.69 Å from the C1 and 0.58 Å from the Co1 atoms.