US EPA

1952905 

Journal Article 

Synthesis of Pentafluorophenyl Silver by Means of Lewis Acid Catalysis: Structure of Silver Solvent Complexes 

Kuprat, M; Lehmann, M; Schulz, A; Villinger, A 

2010 

1 

Organometallics
ISSN: 0276-7333
EISSN: 1520-6041 

29 

6 

1421-1427 

10.1021/om901063a 

WOS:000275410300016 

The synthesis and structure of lithium and silver tetrakis(pentafluorophenyl)borate salts have been studied in different solvents ranging from polar (CH(2)Cl(2), diethyl ether) to nonpolar (toluene, pentane). While Li[B(C(6)F(5))(4)] is stable in all studied solvents and crystallizes with four ether molecules from ether and with two toluene molecules from toluene, the silver salt is only stable when the Ag(+) ion is strongly coordinated such as in [Ag(toluene)(3)][B(C(6)F(5))(4)] or [Ag(Et(2)O)(3)][B(C(6)F(5))(4)]. In weakly coordinating solvents such as CH(2)Cl(2) Ag[B(C(6)F(5))(4)] decomposes, yielding AgC(6)F(5) and B(C(6)F(5))(3). The overall process of the AgC(6)F(5) synthesis starting from B(C(6)F(5))(3) and LiC(6)F(5) can formally be regarded as a B(C(6)F(5))(3)-catalyzed reaction. The salt [Ag(toluene)(3)][B(C(6)F(5))(4)] presents an easily accessible, ether-free, stable silver salt of the [B(C(6)F(5))(4)](-) anion. All compounds have been fully characterized.