To make p-doped graphene, many paper indicate using TFSA (bis-(trifluoromethanesulfonyl)amide, (CF3SO2)2NH)
In Sigma-Aldrich, TSFA doesn't exist but TSFI(Bis(trifluoromethane)sulfonimide, (CF3SO2)2NH) exists
And Sigma-Aldrich also says Bis(trifluoromethane)sulfonimide synonymous with Bis(trifluoromethanesulfonyl)amine
So I think Bis(trifluoromethane)sulfonimide is equal Bis(trifluoromethanesulfonyl)amine
But is Bis(trifluoromethane)sulfonimide equal bis-(trifluoromethanesulfonyl)amide??
I wanna find TSFA but I can't find it
Please explain difference between those