The crystal structure of pentakis(2-picoline N-oxide)coball(II) perchlorate, [Co(C6H7NO)5](ClO4)2, has been determined from X-ray counter data. The material crystallizes in the monoclinic space group C2h5-P21/c, with a = 18.667 (7) Å, b = 10.444 (8) Å, c = 18.665 (7) Å, β = 96° 21 (1)′, Z = 4, dobsd = 1.45 (5) g/cm3, and dcalcd = 1.48 g/cm3. A least-squares refinement gave a final conventional R factor of 0.091 for those 1611 reflections above background with values of λ–1 sin θ > 0.3 Å–1, whereas that for all 2293 independent reflections above background was 0.103. The compound consists of well-separated pentakis(2-picoline N-oxide)coball(II) and perchlorate ions. The immediate coordination about the cobalt atom for this d7 high-spin complex is essentially trigonal bipyramidal with the axial Co–O bond length greater than the equatorial bond length by 0.123 (9) Å.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry