Triethanolamine Complexes of H+, Li+, Na+, Sr2+, and Ba2+ Perchlorates

Ahmad A. Naiini, Jiri Pinkas, Winfried Plass, Victor G. Young, John G. Verkade

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The syntheses of the perchlorate salts of H(TEA)+ (1), Li(TEA)+ (2), Na(TEA)+ (3), Sr(TEA)22+ (4), and Ba-(TEA)22+ (5), wherein TEA = triethanolamine, are reported. Characterizational NMR spectral results (1H, 13C, 7Li, 23Na) as well as crystal structures for 1,3, and 5 are discussed. The structures of 1,3, and 5 reveal respectively the cation H(TEA)+ in which the proton is in a tetrahedral environment, a seven-coordinate sodium weakly coordinated by a monodentate ClO4- and two OH oxygens from neighboring units, and a [Ba(TEA)ClO4]22+ cation in which two weakly coordinating perchlorates bridge two Ba2+ ions in a bidentate fashion. Extensive hydrogen bridging via ClO4- ions occurs in all three compounds giving rise to parallel sheet structures. Crystal data: 1 (at 22 °C), a = 9.086(1) A and c = 23.919(6) A, with Z = 6 in space group R3c; 3 (at 20 °C), a = 9.617(1) Å, b = 7.787(1) Å, c = 15.914(2) Å, and β = 105.80°, with Z = 4 in space group P21/c; 5 (at -50 °C), a = 7.498(2) Å, b = 10.492(2) Å, c = 15.749(3) Å, α= 76.06(2)°, β = 80.56(2)°, and γ= 76.70(2)°, with Z = 2 in space group P[formula ommited].

Original languageEnglish (US)
Pages (from-to)2137-2141
Number of pages5
JournalInorganic Chemistry
Issue number10
StatePublished - May 1 1994

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