TY - JOUR
T1 - Anionic ruthenium(II) alkyls with ancillary diene and dienyl ligands
T2 - Synthesis and structures of [(η2,η2-C7H8)RuMe4]2- and [(η3,η2-C8H11)RuMe3]2-
AU - Jeffries, Patrick M.
AU - Ellenwood, Robert E.
AU - Girolami, Gregory S.
N1 - Funding Information:
We thank the National Science Foundation for support of this research under Grant Nos. DMR03-54060 and DMR04-20768, and Dr. Scott Wilson and Ms. Teresa Prussak-Wieckowska of the University of Illinois X-ray Diffraction Laboratory for collecting the X-ray data for 2 . P.M.J. and R.E.E. acknowledge receipt of University of Illinois Department of Chemistry fellowships.
PY - 2008/7/27
Y1 - 2008/7/27
N2 - Treatment of the ruthenium(II) diene complexes [(η2,η2-nbd)RuCl2]n or [(η2,η2-cod)RuCl2]n with 4 equiv. of methyllithium in the presence of N,N,N′,N′-tetramethylethylenediamine (tmed) yields the methyl complexes [Li(tmed)]2[(η2,η2-nbd)RuMe4] (1) and [Li(tmed)]2[(η3,η2-C8H11)RuMe3] (2), respectively, where nbd = norbornadiene and cod = 1,5-cyclooctadiene. In the latter compound, the cyclooctadiene ligand has been deprotonated to afford a η3,η2-1,2,3:5,6-cyclooctadienyl group. Both complexes were studied by 1H and 13C{1H} NMR spectroscopy, and the crystal structure of 2 was determined. One lithium atom in 2 is four-coordinate and bridges between one ruthenium-bound methyl group and one of the wingtip allylic carbon atoms in the η3,η2-C8H11 ligand. The other lithium atom is five-coordinate, and forms contacts with the other two Ru-Me groups and with the other wingtip carbon atom of the allyl unit.
AB - Treatment of the ruthenium(II) diene complexes [(η2,η2-nbd)RuCl2]n or [(η2,η2-cod)RuCl2]n with 4 equiv. of methyllithium in the presence of N,N,N′,N′-tetramethylethylenediamine (tmed) yields the methyl complexes [Li(tmed)]2[(η2,η2-nbd)RuMe4] (1) and [Li(tmed)]2[(η3,η2-C8H11)RuMe3] (2), respectively, where nbd = norbornadiene and cod = 1,5-cyclooctadiene. In the latter compound, the cyclooctadiene ligand has been deprotonated to afford a η3,η2-1,2,3:5,6-cyclooctadienyl group. Both complexes were studied by 1H and 13C{1H} NMR spectroscopy, and the crystal structure of 2 was determined. One lithium atom in 2 is four-coordinate and bridges between one ruthenium-bound methyl group and one of the wingtip allylic carbon atoms in the η3,η2-C8H11 ligand. The other lithium atom is five-coordinate, and forms contacts with the other two Ru-Me groups and with the other wingtip carbon atom of the allyl unit.
KW - Alkyl
KW - Cyclooctadiene
KW - Cyclooctadienyl
KW - Methyl
KW - Norbornadiene
KW - Ruthenium
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U2 - 10.1016/j.ica.2007.12.002
DO - 10.1016/j.ica.2007.12.002
M3 - Article
AN - SCOPUS:46649100878
SN - 0020-1693
VL - 361
SP - 3165
EP - 3170
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 11
ER -