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Modified Bipyridines: 5,5′‐Diamino‐2,2′‐bipyridine Metal Complexes Assembled into Multidimensional Networks via Hydrogen Bonding and π–π Stacking Interactions
Author(s) -
Janiak Christoph,
Deblon Stephan,
Wu HePing,
Kolm Mario J.,
Klüfers Peter,
Piotrowski Holger,
Mayer Peter
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199909)1999:9<1507::aid-ejic1507>3.0.co;2-i
Subject(s) - chemistry , stacking , hydrogen bond , bipyridine , metal , metal organic framework , nanotechnology , computational chemistry , crystallography , molecule , organic chemistry , crystal structure , materials science , adsorption
A new synthetic route for the synthesis of 5,5′‐diamino‐2,2‐bipyridine ( 5 ) based on the coupling of 2‐chloro‐5‐aminopyridine in the presence of NiCl 2 × 6 H 2 O/PPh 3 /Zn in dimethylformamide is described. The reactions of the potentially ambidentate ligand 5 with salts of the transition metals Mn, Fe, Ni, Cu, Zn, Ag, and Cd gave a variety of 13 metal–ligand complexes depending on the anion, the crystallization conditions and the metal‐to‐ligand ratio. The complexes obtained were characterized by thermal analyses, NMR including 113 Cd‐NMR, IR, and for the iron complex 57 Fe‐Mößbauer spectroscopy. The structure of eight of the compounds was elucidated by X‐ray crystallography. All of these metal complexes show a bipyridine–metal coordination. The amino functionality was never involved in metal coordination. The intermolecular arrangement is dictated by hydrogen bonding from the amino functionality and by π–π stacking of the bipyridine rings.