“…However, with hydrogen montmorillonite, at least, direct protonation of the organic bases might be expected, by analogy with the reactions of such clays with ammonia (Fripiat, 1963) or pyridine (Farmer and Mortland, 1966). But the spectra obtained with H montmorillonite treated with ani-*The results obtained for aniline associations in this study are more accurate than those previously reported (Yariv et al, 1968) due to the more powerful grating instrument now available, which permits more accurate assessment of the positions and relative intensities of the peaks. 301 __mm--mm--mm~m~ ~"z""z"'~z~zz~zzSzz==Z"=z"-z'~=Z~~zz~zz~zz~ z~zz z=z'~ line derivatives show features similar to those of K, Na, Mg and AI montmorillonites and of type II complexes obtained with transition metals (Heller and Yariv, 1969) and differ entirely from the spectra of the corresponding anilinium or anilinium aniline samples (Fig.…”