کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1323005 | 977260 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Formation of niobium and tantalum ylide complexes Formation of niobium and tantalum ylide complexes](/preview/png/1323005.png)
The reactions of tri(bis(ethyl)amino)phosphorus ylide (Et2N)3PCH2 with cyclopentadienyl (Cp) metal (V) tetrachloride CpMCl4 (M = Nb 1; Ta 3) and pentamethylcycopentadienyl (Cp∗) metal (V) tetrachloride Cp∗MCl4 (M = Nb 2; Ta 4) were investigated. The hexa-coordinate ylide adducts complexes 5 (CpNbCl4(H2CP(NEt2)3)), 6 (Cp∗NbCl4(H2CP(NEt2)3)) and 8 (Cp∗TaCl4(H2CP(NEt2)3)) with pseudo-octahedral geometry were structurally analyzed with X-ray diffraction. Compound 4 (Cp∗TaCl4) reacted with three molar equivalent of phosphorus ylide to form one ionic complex 9 ([H3C-P(NEt2)3][Cp∗TaCl5]) which was also structurally analyzed with X-ray diffraction. The possible formation mechanism of compound 9 has been discussed.
The hexa-coordinate ylide adducts complexes 5 (CpNbCl4(CH2P(NEt2)3)), 6 (Cp∗NbCl4(CH2P(NEt2)3)) and 8 (Cp∗TaCl4(CH2P(NEt2)3)) with a pseudo-octahedral geometry were structurally characterized by X-ray diffraction. Compound 4 (Cp∗TaCl4) reacted with three molar equivalent of the phosphorus ylide to form an ionic complex 9 ([H3C-P(NEt2)3][Cp∗TaCl5]). The possible formation mechanism of compound 9 has been discussed.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 693, Issue 16, 1 August 2008, Pages 2679–2682