Synthesis and comparative X-ray diffraction study of first ruthenocene-based pincer palladium complexes, PdCl[{2,5-(But 2PCH2)2C5H2}Ru(Cp′)] (Cp′ = C5H5 or C5Me5) |
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Authors: | S. A. Kuklin F. M. Dolgushin P. V. Petrovskii A. A. Koridze |
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Affiliation: | (1) A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul. Vavilova, 119991 Moscow, Russian Federation;(2) Chemical Department, I. Javakhishvili Tbilisi State University, 1 prosp. Chavchavadze, 380028 Tbilisi, Georgia |
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Abstract: | First ruthenocene-based palladium complexes PdCl[{2,5-(But 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. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1879–1884, November, 2006. |
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Keywords: | 1,3-disubstituted ruthenocene derivatives pincer palladium complexes steric effects X-ray diffraction analysis |
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