Indium complexes macrocyclic ligands

The indium(II) halides, whose solid state structures are In [InX4] for X = Br and I (see Section 25.2.2.5), have served as starting points for the preparation of [In(crown)][InX4](X = Cl, Br, I), [In(crown)][AlCl4] and [In(cyclam)][InX4](X = Br, I crown = dibenzo-18-crown-6 cyclam = 1,4,8,ll-tetraazacyclotetradecane). The characteristic vibrational spectra of the InXj anions were important in establishing the solid state structure of these salts of indium(I) cationic complexes. These macrocyclic ligands do not react with suspensions of InX (c/. thallium below). 

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