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Cover Picture: Chem. Eur. J. 22/2002
Author(s) -
Beauchamp Derek A.,
Loeb Stephen J.
Publication year - 2002
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(20021115)8:22<5053::aid-chem5053>3.0.co;2-k
Subject(s) - phenanthroline , hydrogen bond , nickel , molecule , coordination sphere , crystallography , manganese , cover (algebra) , cobalt , ion , chemistry , chemical physics , metal ions in aqueous solution , crystal structure , materials science , inorganic chemistry , organic chemistry , mechanical engineering , engineering
The cover picture shows stick and space‐filling models of a crystal structure that contains transition metal ions [Mn(H 2 O) 6 ] 2+ (red) and their accompanying ClO 4 − anions (green) suspended in a sea of 4,7‐phenanthroline "ligands" (blue). Curiously, there are no direct manganese–nitrogen bonds. This material is instead knitted together entirely by hydrogen bonds between coordinated water molecules and phenanthroline molecules. The inset figure (top right) depicts schematically the concepts of first‐sphere (dark blue) and second‐sphere (light blue) coordination. This second‐sphere hydrogen bonding may be of particular interest as a methodology for the distribution of metal ions in the solid state, as many magnetic and electronic properties are known to be sensitive to spatial arrangements. The synthetic and structural details of this and related cobalt and nickel materials are outlined in the article by D. A. Beauchamp and S. J. Loeb on p. 5084 ff.