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Cover Picture (Angew. Chem. Int. Ed. Engl. 4/1985)
Publication year - 1985
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198502371
Subject(s) - pyridine , cover (algebra) , chemistry , catalysis , stereochemistry , double bond , crystallography , polymer chemistry , medicinal chemistry , organic chemistry , mechanical engineering , engineering
The cover page shows schematically the main area of research of the Max‐Planck‐Institut für Kohlenforschung in Mülheim: the synthesis and structure elucidation of organometallic compounds and the study of their catalytic activity. The activity and selectivity of (η 5 ‐RC 5 H 4 )Co(cod) catalysts in the synthesis of pyridine is controlled by the R residue. If R is a donor, the 59 Co‐NMR signals are shifted upfield and the catalytic activity decreases; the RC bond is orthogonal to the schematically drawn double bonds of the COD ligand (structure and measured points on right side). If R is an acceptor, Co is deshielded and the catalytic activity increases; the RC bond is parallel to the COD double bonds (structure and measured points on left side). Further details on the structure‐activity relationships for cobalt complexes in homogeneous catalysis are reported by H. Bönnemann in a review on p. 248.