The vibrations of bridging carbonyl groups as more sensitive indicators of molecular geometry than terminal carbonyl groups in transition metals carbonyl cluster compounds Part 2. Some M5 species

A study of the ν(CO) spectra of six M5 trigonal bipyramidal cluster carbonyls shows that the patterns observed are consistent with the postulate that the bridgingspectra are more structure-sensitive than are the terminal ones. A qualitative suggestion is made concerning predictions for species with bridge CO groups with significantly different ν(CO) zeroth-order frequency differences.