Abstract
Investigation of π-(CH 3 n C 5H 5 –n Mn(CO) 3 (Me n -CpMnT) n = 0−5 and t-butyl CpMnT mass spectra showed that Me n CpMnT molecular ion ( M +) fragmentation occurs by a simpler scheme than that for Me n CpReT M + molecular ions. The reason is that MnCp and MnCO bonds are not as strong as the ReCp and ReCO bonds, and the relative “inertness” (compared to Re) of the Mn atom (ion), coordinated to the methylcyclopentadienyl ligand. Variations of M + molecular ion intensity with different values of n are probably due to a complexity of electronic and spatial methyl-carbonyl group interactions in M +.
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