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Upstream product

• 632-22-4 tetramethylurea 
• 1128-13-8 2,3,5,6-tetraaminocyclohexa-2,5-diene-1,4-dione 
• 56043-45-9 N,N,N',N'-tetramethylchlorformamidinium chloride 
• 37091-73-9 2-chloro-1,3-dimethylimidazolinium chloride 

Relevant academic research and scientific papers

Redox-active guanidine ligands with pyridine and p-benzoquinone backbones

Herein we report on the synthesis and some aspects of the chemistry of the new redox-active ligands 2,3,5,6-tetrakis(tetramethylguanidino)pyridine, 2,3,5,6-tetrakis(tetramethylguanidino)-p-benzoquinone and 2,3,5,6-tetrakis(N,N'- dimethyl-N,N'-ethyleneguanidino)-p-benzoquinone. All three ligands are strong electron donors. In addition, the p-benzoquinone systems feature low LUMO energies and small HOMO-LUMO gaps. A comparison of the ligands was made with regard to their optical properties, Bronsted basicity and electron-donor properties; results of quantum chemical calculations were included in this comparison. Subsequently, dinuclear copper complexes were prepared. Preliminary experiments on their redox chemistry followed. Copyright