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Author(s) -
Mamula Olimpia,
Monlien Florence J.,
Porquet Alain,
Hopfgartner Gérard,
Merbach André E.,
von Zelewsky Alex
Publication year - 2001
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20010119)7:2<317::aid-chem317>3.0.co;2-q
Subject(s) - random hexamer , tetramer , cover (algebra) , ligand (biochemistry) , chemistry , crystallography , stereochemistry , receptor , organic chemistry , engineering , mechanical engineering , biochemistry , enzyme
The cover picture shows the influence of pressure on the 1 H NMR signals (right) of the protons of the p ‐xylyl bridge in the Ag + complex of the CHIRAGEN ligand depicted in light blue color. The doubling of the signal is due to the presence of two circular helicates, a hexamer (top left) and a tetramer (top right), both with predetermined absolute configurations. Increasing pressure shifts the equilibrium from the hexamer to the tetramer. The reaction volume has a remarkably large negative value. The study of this equilibrium system is described in more detail by A. von Zelewsky and A. Merbach et al. on p. 533 ff.