Perfluormethyl-Element-Liganden. XL. Chrom- und Wolframpentacarbonylkomplexe von Bis(trifluormethyl)phosphanen des Typs (F3C)2PX′ (X′ = H,F, Cl,Br, I,NEt2) |
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Authors: | J. Grobe D. Le Van W. Meyring |
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Abstract: | Perfluormethyl-Element-Ligands. XL. Chromium and Tungsten Pentacarbonyl Complexes of Bis(trifluoromethyl)phosphanes of the Type (F3C)2PX′ (X′ = H, F, Cl, Br, I, NEt2) The complexes M(CO)5P(CF3)2X′ (M = Cr, W; X′ = H, F, Cl, Br, I) are obtained in preparative amounts (yields between 15 and 42%) by reacting the ligands (F3C)2PX′ with the adducts “M(CO)5CH2Cl2”, photochemically generated from M(CO)6 in methylene chloride. The corresponding derivatives of the aminophosphane Et2NP(CF3)2 can be produced in good yields (60–75%) using the THF complexes M(CO)5THF as precursors. The spectroscopic data (MS, IR, NMR) of the new compounds are reported. The CO valence frequencies v(CO) and the coordination shifts Δδ prove the high π-acidity of the ligands (F3C)2PX′. |
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