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RESEARCH ARTICLE
Contents Vol 75(9)

Facile synthesis and structures of silver formamidinates and pyrazolates†

Zhifang Guo A B , Nicole Wang A , Victoria L. Blair A , Ekaterina I. Izgorodina A , Glen B. Deacon A and Peter C. Junk https://orcid.org/0000-0002-0683-8918 B *
+ Author Affiliations
- Author Affiliations

A School of Chemistry, Monash University, Clayton, Vic. 3800, Australia.

B College of Science and Engineering, James Cook University, Townsville, Qld 4811, Australia.

* Correspondence to: peter.junk@jcu.edu.au

Handling Editor: George Koutsantonis

Australian Journal of Chemistry 75(9) 558-565 https://doi.org/10.1071/CH21282
Submitted: 1 November 2021  Accepted: 16 December 2021   Published: 25 February 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing.

Abstract

Dinuclear silver formamidinates, [Ag2(DFForm)2(py)2] (1) (DFForm, N,N′-bis(2,6-difluorophenyl)formamidinate, py = pyridine), [Ag2(mHForm)2(py)3] (2) and [Ag2(mHForm)2(CH3CN)2] (2a) (mHForm, N,N′-bis(2,3,4,6-tetrafluorophenyl)formamidinate), [Ag2(pHForm)2(py)3] (3) (pHForm, N,N′-bis(2,3,5,6-tetrafluorophenyl)formamidinate), [Ag2(PFForm)2(py)3] (4) (PFForm, N,N′-bis(2,3,4,5,6-pentafluorophenyl)formamidinate) and [Ag2(DippForm)2]·1.25CH2Cl2 (5) (DippForm, N,N′-bis(2,6-diisopropylphenyl)formamidinate), and polynuclear, mainly trinuclear, silver pyrazolates, [Ag3(Ph2pz)3]2 (6) (Ph2pz, 3,5-diphenylpyrazolate), [Ag(tBu2pz)]4 (7) (tBu2pz, 3,5-di-tert-butylpyrazolate), [Ag3(PhMepz)3] (8) (PhMepz, 3-methyl-5-phenylpyrazolate), [Ag3(Phtpz)3] (9) (Phtpz, 3-phenyl-5-(2-thienyl)pyrazolate), [Ag3(ttfpz)3] (10) (ttfpz, 3-(2-thienyl)-5-trifluoromethylpyrazolate) and [Ag2(Me2pz)(PPh3)4Cl] (11) (Me2pz, 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.

Keywords: crystal structures, formamidinates, N‐donor ligands, one-pot reaction, pyrazolates, silver complexes, synthesis.


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