Oxygen-17 relaxation times of metallocarbonyls: the use of the 17O electric quadrupole coupling as a new structural probe

Abstract

The ¹⁷O spin–lattice relaxation times at 54.25 MHz for seven selected metallocarbonyls are in the range 8 to 50 ms at 298 K; the variations are dependent upon the molecular size, the transition metal, and the stereochemical position of the CO group, and may be interpreted in terms of variation of ¹⁷O electric quadrupole coupling constants which show stereochemical dependence, when the effects of correlation times have been allowed for.