The first binary hexameric silver(I) pyrazolate (Agpz) has been prepared, and X-ray analysis demonstrated that it takes a rare figure-eight shape (pz = deprotonated tert-butyl 3,5-diphenyl-1H-pyrazole-4-carboxylate). The hexamer can be easily converted to its tetrameric isomer (Agpz) by recrystallization from ether. On the basis of the H NMR and mass spectrometry measurements, it is conjectured that the hexamer, after dissolving in CHCl, quickly achieves equilibrium with Agpz and Agpz, with the equilibrium lying far to the side of smaller rings.
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Hexameric Silver(I) Pyrazolate: Synthesis, Structure, and Isomerization.
Inorg Chem
September 2017
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.
The first binary hexameric silver(I) pyrazolate (Agpz) has been prepared, and X-ray analysis demonstrated that it takes a rare figure-eight shape (pz = deprotonated tert-butyl 3,5-diphenyl-1H-pyrazole-4-carboxylate). The hexamer can be easily converted to its tetrameric isomer (Agpz) by recrystallization from ether. On the basis of the H NMR and mass spectrometry measurements, it is conjectured that the hexamer, after dissolving in CHCl, quickly achieves equilibrium with Agpz and Agpz, with the equilibrium lying far to the side of smaller rings.
View Article and Find Full Text PDFSynthesis and structure of a water-soluble hexanuclear silver(I) nicotinate cluster comprised of a "cyclohexane-chair"-type of framework, showing effective antibacterial and antifungal activities: use of "sparse matrix" techniques for growing crystals of water-soluble inorganic complexes.
Inorg Chem
December 2003
Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA.
The synthesis of a water-soluble anionic silver 2-mercaptonicotinate complex having effective antibacterial and antifungal properties is described. Its structure has been confirmed to be a hexameric cluster by an X-ray diffraction analysis of a mixed Na(+)/Tris(+) salt (Tris(+) = tris(hydroxymethyl)methylammonium cation). The [Ag(mna)](6)(6-) cluster has a Ag(6)S(6) core and an overall shape of twisted hexagonal cylinder with six sulfur atoms and six silver atoms alternating on a puckered drum-like surface.
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