Synthesis and crystal structures of the first C2-symmetric bis-aldimine NCN-pincer complexes of platinum and palladium |
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Authors: | John S. Fossey Mark L. Russell Christopher J. Richards |
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Affiliation: | a Department of Chemistry, University of Bath, Bath BA2 7AY, UK b School of Chemistry, Main Building, Cardiff University, Cardiff CF10 3AT, UK c School of Biological and Chemical Sciences, Queen Mary, University of London, Mile End Road E1 4NS, UK |
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Abstract: | (S,S)-2,6-bis[(N-α-methylbenzyl)imino]phenylpalladium bromide was synthesised by oxidative addition of palladium(0) to (S,S)-1-bromo-2,6-bis[(N-α-methylbenzyl)imino]benzene. In contrast, (S,S)-2,6-bis[(N-α-methylbenzyl)imino]phenylplatinum chloride was synthesised by direct C-H activation from the reaction of potassium tetrachloroplatinate with (S,S)-1,3-bis[(N-α-methylbenzyl)imino]benzene. The X-ray crystal structures of both pincer complexes were obtained. Treatment of both complexes with silver hexafluoroanimonate gave effective but not stereoselective catalysts for a Michael reaction between methyl vinyl ketone and methyl 2-cyanopropanoate. |
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Keywords: | Pincer complex NCN Platinum Palladium Catalysis Aldimine |
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