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Synthesis and Structure of a Hexameric Silver and Tetrameric Gold Aminopyridinates
Author(s) -
Glatz Germund,
Motz Günter,
Kempe Rhett
Publication year - 2008
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.200800324
Subject(s) - homoleptic , tetrahydrothiophene , chemistry , transmetalation , trimethylsilyl , pyridine , crystallography , crystal structure , metathesis , salt metathesis reaction , stereochemistry , lithium (medication) , medicinal chemistry , metal , catalysis , organic chemistry , polymerization , polymer , medicine , endocrinology
4‐Methyl‐2‐((trimethylsilyl)amino)pyridine (Ap TMS H) was synthesized via a salt metathesis reaction. Lithiation of Ap TMS H with n ‐BuLi afforded the transmetallation agent [(Ap TMS ) 2 Li 2 (OEt 2 ) 2 ] ( 1 ) which was structurally characterized. Reaction of 1 with AgCl and [AuCl(tht)] (tht = tetrahydrothiophene) at low temperatures in THF yielded homoleptic aminopyridinates of the heavier group 11 metals, namely [(Ap TMS ) 6 Ag 6 ] ( 2 ) and [(Ap TMS ) 4 Au 4 ] ( 3a and b ) after work‐up in hexane. All compounds were characterized by X‐ray crystal structure analysis. The quality of the structure determination of 3a allows establishing the connectivity only. The lithium complex 1 shows the expected structure from analogous compounds. The hexameric silver compound shows a new structural motif for silver aminopyridinates. The six‐membered ring of silver atoms has a chair conformation. Compounds 3a and b are the first homoleptic gold aminopyridinates and exhibit a rhombic arrangement of the four gold atoms.