Lithium trifluoromethanesulfonimid

A convenient alternative to LP-DE is lithium trifluoromethanesulfonimide (LiNTf2) in acetone or diethyl ether (LT-AC, LT-DE). Representative examples are the Diels-Alder reactions of citraconic anhydride with cyclopen-tadiene and of dimethyl acetylenedicarboxylate with isoprene [47] (Scheme 6.26). 

Lithium trifluoromethanesulfonimide in acetone or diethyl ether as a safe alternative to lithium perchlorate in diethyl ether for effecting Diels-Alder reactions. Unexpected influence of the counterion on exo/endo selectivity [47]... 

Bis-silyloxy-3,4-dihydropyridines are stable dienes easily synthesized from glutarimide. The Diels-Alder reaction of azadiene 47 with iV-methylmaleimide in benzene at 60 °C gives predominantly the endo-adduct 48, whereas the selectivity is reversed in reaction with lithium trifluoromethanesulfonimide in ether giving predominantly the < vo-adduct 49 (Scheme 12) <1995SL565>. When methyl acrylate is used as the dienophile, the reaction... 

Condueting polymers sueh as polypyrrole is electrochemically deposited from eleetrolyte. Typically, 0.05 0.1 M lithium trifluoromethanesulfonimide (Li.TFSI) or tetrabutylammonium hexafluorophosphate (TBA.PFg) and 0.06 M Pyrrole are... 

The common commercial or laboratory alkanesul-fonamides are listed in Table 6. Of these, methane-sulfonamide, A-methyl methanesulfonamide, A-butyl benzenesulfonamide, and trifluoromethanesulfonimide are in commercial production, the latter in the form of its lithium salt. Measured values are available for a variety of aromatic and akanesulfonamides and sulfonamides along with a discussion on substituent effects. ... 

When lithium salts dissolve, not ah the salts can dissociate and become free ions. On the contrary, there exist at least three states of lithium salts in a polymer matrix, i.e. free ions, ion pairs and aggregations. The hrst requirement for hthium salts is their solubihty in the polymer matrix. Traditional lithium salts used in the polymer electrolytes are L1PF4, LiC104, L1BF4, etc. Recently lithium salts with a large anion such as LiCFsSOs and hthium trifluoromethanesulfonimide (LiTFSI) have attracted much attention, because a larger anion radius promotes ion conductitivity as it is easier to dissociate in the polymer matrix and set off free hthium cations that increase the ion conductivity. 

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