Patent ID: 7709635

Claim:
A salt represented by formula I: wherein, independently for each occurrence, X is —NR A (R B ) 2 or an optionally substituted heterocycle selected from the consisting of pyridinium, imidazolium, benzimidazolium, pyrazolium, benzpyrazolium, indazolium, thiazolium, benzthiazolium, oxazolium, benzoxazolium, isoxazolium, isothiazolium, imdazolidenium, guanidinium, quinuclidinium, triazolium, tetrazolium, quinolinium, isoquinolinium, piperidinium, pyrrolidinium, morpholinium, pyridazinium, pyrazinium, piperazinium, triazinium, azepinium and diazepinium; Y is hydrogen; Z −1 is boron tetraphenyl, methanesulfonate, trifluoromethanesulfonate, benzenesulfonate, p-toluenesulfonate, bis(methanesulfonyl)amide, bis(trifluoromethanesulfonyl)amide, bis(benzenesulfonyl)amide, or bis(p-toluenesulfonyl)amide; R A is hydrogen, alkyl, fluoroalkyl, cycloalkyl, aryl, heteroaryl, aralkyl, heteroaralkyl or —[C(R C ) 2 ] p —R D ; R B is alkyl, fluoroalkyl, cycloalkyl, aryl, heteroaryl, aralkyl, heteroaralkyl or —[C(R C ) 2 ] p —R D ; R C is hydrogen, halogen, alkyl, fluoroalkyl, cycloalkyl, heterocycloalkyl, alkenyl, cycloalkenyl, heterocycloalkenyl, alkynyl, aryl, heteroaryl, aralkyl or heteroaralkyl; R D is hydrogen, halogen, alkyl, fluoroalkyl, cycloalkyl, heterocycloalkyl, cycloalkenyl, heterocycloalkenyl, aryl, heteroaryl, —OR C , —N(R C ) 2 , —SR C , —C(═O)OR C , —C(═O)N(R C ) 2 , —OC(═O)R C , —NR C C(═O)R C , —C(═O)N(R C ) 2 , —C(═O)SR C , —SC(═O)R C , —S(═O)R C , —S(═O) 2 R C , —S(═O) 2 OR C , —C(═O)R C , —C(═NR C )R C , —C(═S)R C , —C(R C )═C(R C ) 2 , —C≡CR C or —[C(R C ) 2 ] p —R C ; p is 1-10 inclusive; optionally two instances of X, taken with the boron to which they are bound, form an optionally substituted 5-, 6-, 7- or 8-membered ring; optionally two instances of R B , taken together with the nitrogen to which they are bound, form an optionally substituted 5-, 6-, 7- or 8-membered ring; and optionally R A and two instances of R B , taken together with the nitrogen to which they are bound, for an optionally substituted 5-, 6-, 7-, 8-membered bicyclo-ring; provided that the salt of formula I has a melting point less than or equal to about 100° C.