Pentacarbonyl(2,6-diaminopyridine)chromium(0): synthesis and molecular structure

Date

2004-7

Author

Morkan, Izzet Amour
Güven, Kutalmış
Özkar, Saim

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Photolysis of hexacarbonylchromium(0) in the presence of 2,6-diaminopyridine in toluene solution at 10 degreesC yields pentacarbonyl(2,6-diaminopyridine)chromium(0), which could be isolated from solution as plate-like crystals and fully characterized by using the single crystal X-ray diffractometry and MS, IR, H-1 and C-13 NMR spectroscopy. The complex was found to have the 2,6-diaminopyridine ligand bonded to the chromium atom through one of the NH2 groups. A single crystal X-ray structure of the complex reveals that the coordination sphere around the chromium atom is a slightly distorted octahedron, involving five carbonyls and one 2,6-diaminopyridine ligand. Because of the steric requirement of 2,6-diaminopyridine the four equatorial carbonyl groups are bended away from the N-donor ligand. The pyridine plane makes an angle of 112.9(3)degrees with the OC-Cr-N bond axis. The Cr-C distances have values between 1.833(7) and 1.935(7) Angstrom. The Cr-N distance is 2.236(5) Angstrom.

Subject Keywords

Chromium, Carbonyl, Diaminopyridine, Molecular structure, XRD, Synthesis, Photolysis, Spectroscopic techniques, X-ray diffraction

URI

https://hdl.handle.net/11511/28428

Journal

Journal of Organometallic Chemistry

DOI

https://doi.org/10.1016/j.jorganchem.2004.04.020

Collections

Department of Chemistry, Article

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Citation Formats

I. A. Morkan, K. Güven, and S. Özkar, “Pentacarbonyl(2,6-diaminopyridine)chromium(0): synthesis and molecular structure,” Journal of Organometallic Chemistry, pp. 2319–2323, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28428.