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Organometallic compounds of the lanthanides . CXXI. Donor-substituted lanthanidocenes. Synthesis of mixed unbridged lanthanidocene chloride and alkyl derivatives
Stepwise reaction of ScCl 3(THF) 3 and the lanthanide trichlorides LnCl 3(THF) n (Ln=Nd, Sm, Ho, Lu) first with (dimethylaminoethyl)cyclopentadienyl potassium (KCp Do) and then with tetramethylcyclopentadienyl sodium (NaCp* H) or with pentamethylcyclopentadienyl sodium (NaCp*), respectively, yields...
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Published in: | Journal of organometallic chemistry 1998-07, Vol.562 (2), p.255-262 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Stepwise reaction of ScCl
3(THF)
3 and the lanthanide trichlorides LnCl
3(THF)
n
(Ln=Nd, Sm, Ho, Lu) first with (dimethylaminoethyl)cyclopentadienyl potassium (KCp
Do) and then with tetramethylcyclopentadienyl sodium (NaCp*
H) or with pentamethylcyclopentadienyl sodium (NaCp*), respectively, yields the mixed sandwich complexes Cp
DoCp*
HScCl (
1), Cp
DoCp*
HLnCl {Ln=Nd (
2), Sm (
3), Ho (
4), Lu (
5)} and Cp
DoCp*LuCl (
6), respectively. Treatment of
1–
5 with methyl lithium in Et
2O afforded the chiral alkyl derivatives Cp
DoCp*
HScMe (
7) and Cp
DoCp*
HLnMe {Ln=Nd (
8), Sm (
9), Ho (
10), Lu (
11)}, respectively. Reaction of
6 with LiCH
2SiMe
3 yields the corresponding alkyl derivative Cp
DoCp*LuCH
2SiMe
3 (
12). The new complexes were characterized by elemental analysis, MS and NMR spectroscopy, as well as by single crystal X-ray structure analysis (
1 and
7). |
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ISSN: | 0022-328X 1872-8561 |
DOI: | 10.1016/S0022-328X(98)00541-5 |