Crystal and molecular structure of (2,2′-bipyridine) pyridine tricarbonyl molybdenum (III)

Abstract

The crystal and molecular structure of (2,2′-bipyridine) pyridine tricarbonyl molybdenum (III), [(C₁₀H₈N₂)(C₅H₅N)(CO)₃Mo], has been determined from three-dimensional data collected photographically. The space group isPnam; the unit cell has the dimensionsa = 14·755 ±1,b = 8·344 ± 1,c = 13·733 ± 1 Å (at 20 °C) and contains four molecules. The structure has been refined to a residual (R) of 0·073 using least-squares methods on 1394 independent non-zero reflexions.

The molecule has been found to be octahedral in arrangement, with bipyridine and pyridine forming one triangle and the three carbonyl groups forming the opposite triangle of the octahedron. The best fit plane through the pyridine and lower carbonyl groups make an angle of 78 ° with the equatorial plane. There is evidence of significant distortion from the ideal octahedral angles of 90 °.

Within the molecule, no interatomic distance or bond angle departs significantly from accepted values.