Chemical shift effects in the 13C-NMR spectra of [(C5H5)(CO)2FeII]-substituted cyclohexanes, dioxanes and tetrahydropyrans
摘要:
A set of empirically derived C-13-NMR chemical shift additivity constants have been calculated for the Fp-substituent on cyclohexane, tetrahydropyran and dioxane rings. These were tested against a series of alkyl substituted Fp-complexes. These parameters prove to be highly reliable; the calculated and experimental chemical shifts are within +/-1 ppm. The parameters vary greatly between ring systems. One explanation for the differences relates to changes in conformation about the. bond connecting the Fp-group to the various rings. (C) 2001 Elsevier Science B.V. All rights reserved.
Chemical shift effects in the 13C-NMR spectra of [(C5H5)(CO)2FeII]-substituted cyclohexanes, dioxanes and tetrahydropyrans
作者:Hong-ju Li、Alfredo Castro、Mark M Turnbull
DOI:10.1016/s0022-328x(01)00874-9
日期:2001.7
A set of empirically derived C-13-NMR chemical shift additivity constants have been calculated for the Fp-substituent on cyclohexane, tetrahydropyran and dioxane rings. These were tested against a series of alkyl substituted Fp-complexes. These parameters prove to be highly reliable; the calculated and experimental chemical shifts are within +/-1 ppm. The parameters vary greatly between ring systems. One explanation for the differences relates to changes in conformation about the. bond connecting the Fp-group to the various rings. (C) 2001 Elsevier Science B.V. All rights reserved.