Spectra of cyclopentadienylalkali and cyclopentadienylmagnesium compounds in tetrahydrofuran

Add time:07/18/2019    Source:sciencedirect.com

Dicyclopentadienylmagnesium, cyclopentadienylmagnesium chloride, cyclopentadienylmagnesium bromide, cyclopentadienyllithium and cyclopentadienylsodium were examined by UV, IR, and PMR spectroscopy in tetrahydrofuran. None of them exhibited UV maxima at >210 nm. All of their infrared spectra indicated D5h, D5d or C5v symmetry. All of their PMR spectra consisted of sharp single peaks at room temperature. The results are interpreted in terms of metal cyclopentadienide ion pairs in which the metal atom lies on or near the C5 axis of the cyclopentadienide ion.

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