Journal
AUSTRALIAN JOURNAL OF CHEMISTRY
Volume 75, Issue 9, Pages 558-565Publisher
CSIRO PUBLISHING
DOI: 10.1071/CH21282
Keywords
crystal structures; formamidinates; N-donor ligands; one-pot reaction; pyrazolates; silver complexes; synthesis
Categories
Funding
- ARC [DP190100798]
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This study investigates the synthesis methods of different types of silver formamidinate and silver pyrazolate compounds. These synthesis methods are simple, easy to handle, and have high yields, making them potential precursor compounds for synthesizing lanthanoid and alkaline earth pyrazolate and formamidinate complexes.
Dinuclear silver formamidinates, [Ag-2(DFForm)(2)(py)(2)] (1) (DFForm, N,N'-bis(2,6-difluorophenyl) formamidinate, py = pyridine), [Ag-2(mHForm)(2)(py)(3)] (2) and [Ag-2(mHForm)(2)(CH3CN)(2)] (2a) (mHForm, N,N'-bis(2,3,4,6-tetrafluorophenyl)formamidinate), [Ag-2(pHForm)(2)(py)(3)] (3) (pHForm, N,N'-bis(2,3,5,6-tetrafluorophenyl)formamidinate), [Ag-2(PFForm)(2)(py)(3)] (4) (PFForm, N,N'-bis (2,3,4,5,6-pentafluorophenyl)formamidinate) and [Ag-2(DippForm)(2)]center dot 1.25CH(2)Cl(2) (5) (DippForm, N,N'-bis(2,6-diisopropylphenyl)formamidinate), and polynuclear, mainly trinuclear, silver pyrazolates, [Ag-3(Ph(2)pz)(3)] 2 (6) (Ph(2)pz, 3,5-diphenylpyrazolate), [Ag(tBu(2)pz)] 4 (7) (tBu(2)pz, 3,5-di-tertbutylpyrazolate), [Ag-3(PhMepz)(3)] (8) (PhMepz, 3-methyl-5-phenylpyrazolate), [Ag-3(Phtpz)(3)] (9) (Phtpz, 3-phenyl-5-(2-thienyl)pyrazolate), [Ag-3(ttfpz)(3)] (10) (ttfpz, 3-(2-thienyl)-5-trifluoromethylpyrazolate) and [Ag-2(Me(2)pz)(PPh3)(4)Cl] (11) (Me(2)pz, 3,5-dimethylpyrazolate) were successfully synthesized in good yield by treating silver(I) oxide with the corresponding formamidines (FormH) or pyrazoles (pzH) either in pyridine or acetonitrile. These rapid, easily handled and economical reactions are readily monitored by consumption of black silver oxide. All compounds are potential precursors in redox transmetallation reactions in the synthesis of lanthanoid and alkaline earth pyrazolate and formamidinate complexes.
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