coordination studies of 1,2-bis(diphenylphosphino)ethane with di-μ-hydroxo dinuclear complexes of tungsten(iv) and molybdenum(iv)
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ID: 159944
2016
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Abstract
The new trifluoroethoxo phosphine complexes [Cp2M(η1-dppe)(CF3CH2O)]+ and
[Cp2(CF3CH2O)M(μ-dppe)MCp2(CF3CH2O)]2+ (M = Mo or W, Cp = η-C5H5 and dppe =
Ph2PCH2CH2PPh2) have been prepared by reaction of cationic di-μ-hydroxo
dinuclear complex of molybdenocene or tungstenocene [Cp2M(μ-OH)2MCp2]2+ with
dppe. From the 1H and 31P NMR data, the configurations of the products could
be assigned. Furtheremore, X-ray crystallography was used to definitively
identify one of the product [Cp2(CF3CH2O)Mo(μ-dppe)MoCp2(CF3CH2O)]2+, which
crystallizes in space group P21/c(#14) with a = 12.230(5) Å, b = 11.149(5)
Å, c = 28.966(7) Å, β = 101.07(3)°, V = 3876(2) Å3, and Z = 2. It was
ascertained that the amount of dppe added to the reaction mixture could
influence the product distribution. A mechanism involving initial
replacement of the hydroxo ligand by the alkoxo group followed by
nucleophilic attack of the phosphine is proposed on the basis of the
reaction profile.
| Reference Key |
makoto2016journalcoordination
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|---|---|
| Authors | ;Minato Makoto;Ito Takashi;Ren Jian-Guo |
| Journal | meditsinskaia radiologiia |
| Year | 2016 |
| DOI |
10.2298/JSC150501066M
|
| URL | |
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