Synthesis and comparative Xray diffraction study of first ruthenocene-based pincer palladium complexes, PdCl[{2,5(Bu-t-2PCH2)2C5H2}Ru(Cp´)] (Cp´ = C5H5 or C5Me5)статья
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Аннотация:First ruthenocenebased palladium complexes PdCl[{2,5-(Bu-t-2PCH2)2C5H2}Ru(Cp´)] (Cp´ = C5H5 (4) or C5Me5 (5)) were synthesized. Comparative single-crystal X-ray diffraction study of complexes 4 and 5 showed that the deviations of the cyclopentadienyl rings in these complexes from being parallel are 2.6 and 10.1°, respectively. In addition, the shift of the palladium atom relative to the plane of the metallated cyclopentadienyl ligand is 0.007 Å for 4 and 0.336 Å for 5. These differences in the structures of complexes 4 and 5 are due to close contacts between the pseudoequatorial tert-butyl groups at the phosphorus atoms and the unmetallated cyclopentadienyl ring.
Key words: 1,3-disubstituted ruthenocene derivatives, pincer palladium complexes, steric
effects, X-ray diffraction analysis.