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Synthesis and Crystal Structures of Dinuclear Zinc Complexes with the 3,5‐Bis(pyridine‐2‐yl)pyrazolato Ligand
Author(s) -
Kloubert Tobias,
Görls Helmar,
Westerhausen Matthias
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201000168
Subject(s) - pyridine , chemistry , zinc , trimethylsilyl , amide , tetrahydrofuran , ligand (biochemistry) , pyrazole , stereochemistry , medicinal chemistry , crystallography , crystal structure , organic chemistry , receptor , biochemistry , solvent
Abstract Zincation of 3,5‐bis(pyridine‐2‐yl)pyrazole with Zn[ E (SiMe 3 ) 2 ] 2 in tetrahydrofuran yields dimeric 3,5‐bis(pyridine‐2‐yl)pyrazolato zinc bis(trimethylsilyl)amide ( E = N, 1 ) and bis(trimethylsilyl)methanide ( E = CH, 2 ). These complexes crystallize in the space groups $\rm P2_1/n$ , respectively. The zinc atoms are in distorted tetrahedral environments. In the solid state the 3,5‐bis(pyridine‐2‐yl)pyrazolato anions act as bridging tridentate bases with one pyridyl group not participating in the coordination behavior. In solution, exchange processes, which are fast on the NMR time scale, lead to a single set of resonances for the pyridyl substituents.