TY - JOUR
T1 - Zirconium alkyls with ancillary cyclooctatetraenyl ligands. X-ray crystal structures of [Li(tmed)][(C8H8)Zr(p-C6H4Me)Cl2] and (C8H8)Zr[CH(SiMe3)2]2
AU - Nelsen, Melissa J.
AU - Girolami, Gregory S.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Several new group 4 alkyl and aryl compounds have been synthesized that possess ancillary cyclooctatetraene ligands. Most of the complexes isolated are anionic and have stoichiometries of [Li(tmed)2][(C8H8)MRCl2], [Li(tmed)x][(C8H8)MR2Cl], or [Li(tmed)x][(C8H8)MR3], where M = Zr or Hf, and R = Me, Ph, p-Tol, or CH(SiMe3)2. Two neutral 14-electron compounds have also been prepared, (C8H8)M[CH(SiMe3)2]2, where R = Zr or Hf. The compound (C8H8)Zr[CH(SiMe3)2]2 appears to react reversibly with 7 atm of carbon monoxide but does not react with dihydrogen even at 70 atm. IR, 1H and 13C NMR data are reported, along with the crystal structures of two of the new compounds.
AB - Several new group 4 alkyl and aryl compounds have been synthesized that possess ancillary cyclooctatetraene ligands. Most of the complexes isolated are anionic and have stoichiometries of [Li(tmed)2][(C8H8)MRCl2], [Li(tmed)x][(C8H8)MR2Cl], or [Li(tmed)x][(C8H8)MR3], where M = Zr or Hf, and R = Me, Ph, p-Tol, or CH(SiMe3)2. Two neutral 14-electron compounds have also been prepared, (C8H8)M[CH(SiMe3)2]2, where R = Zr or Hf. The compound (C8H8)Zr[CH(SiMe3)2]2 appears to react reversibly with 7 atm of carbon monoxide but does not react with dihydrogen even at 70 atm. IR, 1H and 13C NMR data are reported, along with the crystal structures of two of the new compounds.
KW - Alkyls
KW - Aryls
KW - Cyclooctatetraene
KW - Hafnium
KW - Zirconium
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U2 - 10.1016/j.poly.2020.114581
DO - 10.1016/j.poly.2020.114581
M3 - Article
AN - SCOPUS:85087515023
VL - 187
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
M1 - 114581
ER -