Electrochemical interactions in binuclear molybdenum and tungsten nitrosyl complexes incorporating saturated n-alkanediolate bridging ligands.: Crystal structures of [Mo(NO)(TpMe2)I{O(CH2)2OCOCH3}] and [W(NO)(TpMe2)I2] • 0.5I2 • 0.5C6H5CH3

被引：5

作者：

Wlodarczyk, Andrzej J. ^{[1
]}

Romanczyk, Piotr P. ^{[1
]}

Kurek, Stefan S. ^{[1
]}

Nitek, Wojciech ^{[2
]}

McCleverty, A. ^{[3
]}

机构：

[1] Cracow Univ Technol, Fac Chem Engn & Technol, PL-31155 Krakow, Poland

[2] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland

[3] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England

来源：

POLYHEDRON | 2008年 / 27卷 / 02期

关键词：

molybdenum nitrosyl complex; tungsten nitrosyl complex; bimetallic complexes; tris(pyrazolyl)borato complexes; saturated bridging systems; electrochemical interactions;

D O I：

10.1016/j.poly.2007.11.008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of bimetallic ([{M(NO)(Tpe(Me2))X}(2) (Q)] [Tp(Me2) = tris(3,5-dimethylpyrazolyl)borate; M = Mo, X Cl, Q = O(CH2)(n)O, n = 3, 5, 6, or OCH2(CF2)(3)CH2O; M = Mo, X = I, n = 3 or 4; M = W, X = Cl, n = 3-6, or OCH2(CF2)(3)CH2O; M = W, X = Br, n = 2]), and a number of monometallic complexes ([M(NO)(Tp(Me2))X(QH)] [M = Mo, X = Cl, Q = O(CH2)(n)O, n = 3, or OCH2(CF2)(3)CH2O; M = W, X = Br, n = 2]) were prepared. The heterobimetallic complex [[Mo(NO)(Tp(Me2))Br}O(CH2)(2)O{W(NO)(Tp(me2))Br}] was also obtained. All compounds were characterised by elemental and mass analyses, H-1 NMR and IR spectroscopy. Electrochemical studies (CV and DPV) of the bimetallic species reveal that the metal-metal interactions decrease by ca. 100 mV per CH2 group with increased length for C-2 to C-4 bridges and become undetectable for complexes with bridges longer than C-4. The substitution of fluorine into the C-5 bridge causes the effect to become measurable due to easier polarisation of the sigma-bond framework. The crystal structures of [Mo(NO)(Tpme2)I{O(CH2)(2)OCOCH3}] and [W(NO)(Tp(Me2))I-2] center dot 0.5I(2) center dot 0.5C(6)H(5)CH(3) were determined. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：783 / 796

页数：14

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