NONCOORDINATING ANIONS .2.

An idealized state of a solution without cation-anion interactions can now be quite well approximated with.weakly coordinating anions. Consequently, the prerequisites for the stabilization of coordinatively unsaturated cationic compounds that show unusual bonding or that are discussed as catalytically active species have been achieved. Strauss et al. have now established tellurate-containing anions such as 1-3, which show several advantages over the frequently used tetraarylborates and carborane anions. Cations such as [Ag(CO)2]+ and [Ag(CH2Cl2)3]+ can be isolated with them-in these two examples, for instance, the counterions are 1 and 3, respectively.