共 31 条
Synthesis and hydrogenation of bis(imino)pyridine iron Imides
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作者:

Bart, SC
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机构: Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA

Lobkovsky, E
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机构: Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA

Bill, E
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机构: Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA

Chirik, PJ
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机构:
Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA
机构:
[1] Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA
[2] Max Planck Inst Bioinorgan Chem, D-45470 Mulheim, Germany
关键词:
D O I:
10.1021/ja057165y
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Treatment of the iron bis(dinitrogen) complex, (iPrPDI)Fe(N2)2 (iPrPDI = (2,6-iPr2C6H3N=CMe)2C5H3N), with a series of aryl azides resulted in loss of 3 equiv of N2 and formation of the corresponding four-coordinate iron imide compounds, (iPrPDI)Fe(NAr). These complexes, two of which (Ar = 2,6-iPr2-C6H3 and 2,4,6-Me3-C6H2) have been characterized by X-ray diffraction, are significantly distorted from planarity. The metrical parameters in combination with Mössbauer spectroscopic and SQUID magnetic data suggest an intermediate spin iron(III) center antiferromagnetically coupled to a ligand-centered radical. Nitrene group transfer has been accomplished by addition of 1 atm of CO, yielding aryl isocyanates, ArNCO, and (iPrPDI)Fe(CO)2. Hydrogenation of the more sterically hindered members of the series furnished free aniline and the previously reported iron dihydrogen complex. Catalytic aryl azide hydrogenation has also been achieved, and the observed relative rates are consistent with N-H bond formation as the rate-determining step in aniline formation. Copyright © 2006 American Chemical Society.
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页码:5302 / 5303
页数:2
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