The First Late‐Transition‐Metal Cyclopentadienyl Chelate Complexes with Silylphosphane or Secondary Phosphane Tethers
The First Late‐Transition‐Metal Cyclopentadienyl Chelate Complexes with Silylphosphane or Secondary Phosphane Tethers
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第一个后过渡金属环戊二烯基螯合物与甲硅烷基膦或二级膦链
DOI:
10.1002/ejic.201402886
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发表时间:
2014
影响因子:
2.3
通讯作者:
Holger Butenschön
中科院分区:
文献类型:
--
作者:
Irina Werner;Holger Butenschön
While phosphane‐tethered cyclopentadienyl complexes with tertiary phosphane moieties have extensively been investigated for many metals, this is not the case for such complexes with a secondary phosphane tether. Only a few representatives of such complexes with early‐transition‐metals are known. Here, we report the first late‐transition‐metal cyclopentadienyl chelate complexes with silylphosphane or secondary phosphane tethers. The respective ligand system is generated by nucleophilic opening of spiro[2.4]hepta‐4,6‐diene with lithiumtert‐butylphosphide. The anionic ligand is trapped with iron(II) chloride with formation of the respective ferrocene derivative. Treatment of lithiumtert‐butylphosphide withtert‐butylchlorodimethylsilane or with chlorotriisopropylsilane affords the respective secondary silylphosphanes. Deprotonation, reaction with spiro[2.4]hepta‐4,6‐diene, followed by treatment with nickel dihalide complexes affords the respective nickel cyclopentadienylalkylsilylphosphane chelates as the first representatives of their kind. Their halide ligands can easily be exchanged by methylation with methyllithium or by reaction with trimethylsilyl cyanide to give the respective cyano chelate. Under the chromatographic conditions applied, this complex undergoes a protiodesilylation to give the first secondary cyclopentadienylalkylphosphane chelate of a late‐transition‐metal, which has been characterized by X‐ray crystallographic analysis. Alternatively, deprotonation of the extremely sterically crowded primary (2,4,6‐tri‐tert‐butylphenyl)phosphane followed by nucleophilic ring opening of spiro[2.4]hepta‐4,6‐diene and reaction of the anionic ligand system with NiBr2(thf)2directly affords the respective cyclopentadienylalkylphosphane nickel chelate with a secondary phosphane ligand.
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DOI:
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发表时间:
1992
期刊:
影响因子:
--
作者:
H. Butenschön;Ralf T. Kettenbach;C. Krüger
通讯作者:
C. Krüger
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
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Thomas Höcher;S. Blaurock;E. Hey‐Hawkins
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E. Hey‐Hawkins
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
J. Foerstner;R. Wartchow;H. Butenschön
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H. Butenschön
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作者:
M. Scheer;D. Himmel;C. Kuntz;Shuzhong Zhan;E. Leiner
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E. Leiner
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
J. Foerstner;S. Kozhushkov;P. Binger;P. Wedemann;M. Noltemeyer;A. Meijere;H. Butenschön
通讯作者:
H. Butenschön