Graphite intercalation compounds ͑GICs͒ containing bis͑trifluoromethanesulfonyl͒ imide, N͑SO 2 CF 3 ͒ 2 Ϫ , are prepared for the first time by electrochemical oxidation of graphite. Electrolytes with nitromethane and ethyl methyl sulfone are used to prepare GICs up to stage 1. The potential-charge curves under galvanostatic or pulse-charge mode show transitions associated with GIC staging, and charge and discharge capacities and charging efficiencies are reported at transition points. The stage 1 GICs have not been prepared before and rapidly decompose in air in the electrolyte. GIC gallery heights and stages are determined by powder X-ray diffraction, and the stage 1 composition is determined by thermogravimetric analysis. Structural and electrochemical properties are compared with those for related GICs.
Here we report a silver-mediated
trifluoromethoxylation of (hetero)aryldiazonium tetrafluoroborates
by converting an aromatic amino group into an OCF3 group.
This method, which can be considered to be a trifluoromethoxylation
variation of the classic Sandmeyer-type reaction, uses readily available
aryl and heteroaromatic amines as starting materials and AgOCF3 as trifluoromethoxylating reagents. The broad substrate scope
and simple, mild reaction condition made this transformation a valuable
method in constructing aryl–OCF3 bonds.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.