Gas phase chemistry of bis(pentamethylcyclopentadienyl)samarium
- Instituto Technologico e Nuclear, Sacavem (Portugal)
- Univ. of California, Irvine, CA (United States)
The gas phase chemistry of bis(pentamethylcyclopentadienyl)samarium, (C{sub 5}Me{sub 5}){sub 2}Sm, was studied by Fourier transform ion cyclotron resonance mass spectrometry (FTICR/MS). Positive electron impact (EI) spectra showed the formation of (C{sub 5}Me{sub 5}){sub 2} Sm{sup +}, (C{sub 5}Me{sub 5})Sm{sup +}, and Sm{sup +}. All three ions reacted with (C{sub 5}Me{sub 5}){sub 2}Sm by charge transfer, as verified by double-resonance techniques, and (C{sub 5}Me{sub 5})Sm{sup +} also formed the (C{sub 5}Me{sub 5}){sub 3}Sm{sub 2}{sup +} ion in a condensation reaction with neutral (C{sub 5}Me{sub 5}){sub 2}Sm. The laser desorption/ionization (LDI) spectra showed, in addition to (C{sub 5}Me{sub 5}){sub 2}Sm{sup +}, (C{sub 5}Me{sub 5})Sm{sup +}, and Sm{sup +}, the formation of (C{sub 5}Me{sub 4}H)Sm{sup +} and (C{sub 5}Me{sub 4}CH{sub 2})Sm{sup +}. The latter species most probably involves a tetramethylfulvenide ligand. Access to all of the ionic species cited here could also be obtained by reacting laser-desorbed Sm{sup +} ions with pentamethylcyclopentadiene, C{sub 5}Me{sub 5}H. (C{sub 5}Me{sub 4}CH{sub 2})Sm{sup +}, (C{sub 5}Me{sub 4}H)Sm{sup +}, and (C{sub 5}Me{sub 5})Sm{sup +} were formed as primary products, and the metallocene ion (C{sub 5}Me{sub 5}){sub 2}Sm{sup +} resulted from the rapid addition of C{sub 5}Me{sub 5}H to (C{sub 5}Me{sub 4}CH{sub 2})Sm{sup +}. 34 refs., 4 figs.
- OSTI ID:
- 196656
- Journal Information:
- Organometallics, Journal Name: Organometallics Journal Issue: 1 Vol. 15; ISSN ORGND7; ISSN 0276-7333
- Country of Publication:
- United States
- Language:
- English
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