Abstract
AbstractThe trans‐configured square‐planar palladium complexes [Pd(OAc)2(LNtBu)2] (1), [Pd(OAc)2(η2‐LN∩NtBu)] (2), [Pd(OAc)2(LNPh)2] (3), and [Pd(OAc)2(η2‐LN∩NPh)] (4), have been synthesized by treating palladium acetate with the amines NHtBuCH2‐2,4,6‐Me3C6H2 (LNtBu) or NHPhCH2‐2,4,6‐Me3C6H2 (LNPh) or with the diamines NHtBuCH2‐2,4,6‐Me3C6H‐CH2‐2,4,6‐Me3C6H‐CH2‐NHtBu (LN∩NtBu) or NHPh‐CH2‐2,4,6‐Me3C6H‐CH2‐2,4,6‐Me3C6H‐CH2‐NHPh (LN∩NPh). The single‐crystal X‐ray structure analysis of complexes 1–3 confirms a trans arrangement of the two acetato groups and of the two nitrogen atoms. Orthometalation leading to palladacycles is impossible in all cases as the ortho positions in the benzylic rings are blocked by methyl substituents. All complexes are found to catalyze Suzuki cross‐coupling reactions of deactivated and even sterically hindered arene substrates. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
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