Correlation of 31P chemical shifts and carbonyl stretching force constants with substituent constants for a series of ring-substituted arene chromium dicarbonyl triphenylphosphine complexes

Abstract

Fourteen mono-substituted arene chromium tricarbonyl and arene chromium dicarbonyl triphenylphosphine complexes have been prepared and characterized by IR and NMR spectroscopy. Carbonyl stretching force constants for all compounds have been calculated. Correlations of stretching forces constants of arene chromium tricarbonyl complexes with a series of substituent constants agree well with those reported in earlier studies. Similarly, both the stretching force constants and 31P chemical shifts of arene chromium dicarbonyl triphenylphosphine complexes have been compared with the same series of substituent constants and were found to exhibit trends similar to those previously observed.