The first example of a structurally characterized octahedral hydrotris(pyrazolyl)borate iron methyl complex

被引：4

作者：

Graziani, O

Toupet, L

Hamon, JR

Tilset, M

机构：

[1] Univ Rennes 1, UMR 6509 CNRS, Inst Chim, F-35042 Rennes, France

[2] Univ Rennes 1, UMR 6626 CNRS, Grp Mat Condensees & Mat, F-35042 Rennes, France

[3] Univ Oslo, Dept Chem, N-0315 Oslo, Norway

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2003年 / 669卷 / 1-2期

关键词：

photochemical decarbonylation; tris(pyrazolyl)borate; crystal structure; alkyl complex; acyl complex; iron complex;

D O I：

10.1016/S0022-328X(03)00006-8

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The one-step synthesis of the known acetyl complex kappa(3)-TpFe(CO)(PMe3)(COMe) (1, 78% yield) is achieved by reaction of cis,trans-Fe(CO)(2)(PMe3)(2)MeI with potassium hydrotris(pyrazolyl)borate (KTp), in CH2Cl2 at room temperature. This reaction is specific to the parent Tp ligand. Visible light irradiation of 1 in toluene for 1 h afforded the first octahedral methyl-iron complex featuring the hydrotris(pyrazolyl)borate ligand TpFe(CO)(PMe3)Me (2) in 80% yield. Compound 2 has been fully characterized by elemental analysis, IR, NMR spectroscopies, cyclic voltammetry and by an X-ray diffraction analysis. A comparison of steric and electronic properties is made with those of related cyclopentadienyl (Cp, Cp*, C5Ph5) complexes, and suggests that relative donating abilities follow the trend Cp, Cp*, C5Ph5 > Tp, and structural comparisons indicate that Tp is the most sterically demanding ligand. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：200 / 206

页数：7

共 62 条

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