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Nickelacyclic Carboxylates with Pyridine‐Based Ligand Sets – From Mononuclear Complexes to Supramolecular Architectures by Hydrogen Bonding
Author(s) -
Langer Jens,
Walther Dirk,
Malassa Astrid,
Westerhausen Matthias,
Görls Helmar
Publication year - 2010
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/ejic.200900888
Subject(s) - chemistry , pyridine , supramolecular chemistry , ligand (biochemistry) , hydrogen bond , carboxylate , stereochemistry , crystallography , nuclear magnetic resonance spectroscopy , medicinal chemistry , molecule , crystal structure , organic chemistry , biochemistry , receptor
A series of nickelacyclic carboxylates of the general formula [Ni(CH 2 CH 2 COO)(L 2 )] with p ‐substituted pyridine ligands ( 2 : L = 4‐picoline; 3 : L = 4‐MeO 2 C‐C 4 H 4 N; 4 : 4‐Me 2 N‐C 4 H 4 N) was synthesized and characterized by NMR spectroscopy. A correlation between the shift of the CH 2 groups of the nickelacycle in the 1 H NMR spectra and basicity of the used pyridine ligand was observed. Furthermore, amino‐substituted pyridine derivatives were used in ligand‐exchange reactions leading to supramolecular assemblies via H‐bond formation between the amino function and the carboxylate group. Depending on the ligand used, discrete dimers [ 5 : L 2 = ( t Bu)(Me) 2 Si‐aminomethylpyridine], chains [ 6 : L 2 = 2‐(aminomethyl)pyridine] or layers ( 7 : L = 4‐H 2 N‐C 4 H 4 N) were observed. The molecular structures of all new compounds 2 – 7 were determined by X‐ray measurement.