摘要:
Combining R2Cd (R an alkyl or Ph group), the corresponding R2Mg compound, and 1,4,8,- 11-tetramethyl-1,4,8,11-tetraazatetradecane, 2,1,1-cryptand, or 2,2,1-cryptand in solution quantitatively produces R3Cd- and RMg(macrocycle)(+) ions. Solutions obtained by combining the same macrocycles with R2Cd alone or with R2Cd plus the corresponding R2Zn compound do not contain significant amounts of ions; rapid exchange of R groups in these solutions, however, may be due to formation of trace amounts of R3Cd- ions.