A complex with the formula (CO) 5CrC5H7N was recently prepared. The handout distributed in class discusses a variety of characterization techniques typically used for organ metallic compounds. The results of the more commonly used NMR and IR data are as follows.
IR -- In the carbonyl region there are stretches at 2057, 1980, and 1908 cm-1.
The NMR spectra are as follows
1H NMR chemical shift (relative intensity): 3.65 (3H), 3.89 (3H), 5.91 (1H)
13C NMR chemical shift (splitting): 47.97 (quartet), 49.71 (quartet), 84.16 (doublet),
116.1 (doublet), 216.98, 223.82, 248.85 (singlets)
Explain what is the structure of the compound which is consistent with the 18-electron rule for the transition metal and the octet rule?