Abstract
AbstractThe cover picture shows that bulky substituents on the backbone of a chelating ligand lead to metal–phosphane bond cleavage. Butyl groups in [bis(1‐allyl‐5‐butylpyrazol‐3‐yl)pyridine](PPh3)RuCl2 give rise to a highly active ruthenium(II) catalyst for transfer hydrogenation. The actual catalytic activity strongly depends on both the substitution pattern at the chelating ligand backbone and the auxiliary ligand coordinated to the ruthenium(II) site (PPh3 vs. CO). Details are discussed in the article by W. R. Thiel et al. on p. 3431ff.
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