X-ray diffraction and vibrational spectroscopic study of trans-bis(acetylacetonato)-bis(4-methylpyridine)cobalt(III)

Investigation of nitro–nitrito photoisomerization: crystal structures of trans-bis(acetylacetonato-O,O′)(pyridine/4-methylpyridine/3-hydroxypridine)nitrocobalt(III)

“…There are two entries of trans-[Co(acac) 2 (NO 2 )(X-py)] in the Cambridge Structural Database (CSD Version 5.39; Groom et al, 2016), the pyridine derivative being 3-methylpyridine (Miyazaki et al, 1998), and 4,4,5,5-tetramethyl-2-(3-pyridyl)imidazolin-1-oxyl radical (Ogita et al, 2002). Entries for the other related compounds include trans-[Co(acac) 2 (NO 2 )(2aminopyrimidine)] (Kistenmacher et al, 1978), trans-[Co(acac) 2 (NO 2 )(H 2 O)] (Englert & Strä hle, 1987), and trans-[Co(acac) 2 (4-methylpyridine) 2 ]PF 6 (Tayyari et al, 2015), for which theoretical assignments of the IR bands were presented.…”