Complexation of metal and ammonium thiocyanates with 2,3-benzo(4'-phenylacetyl)-15-crown-5,2,3-benzo(4'-diphenylacetyl)-15-crown-5 and 2,3-benzo(4'-diphenylacetyl)-12-crown-4-in acetonitrileстатья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:Complex formation between NaSCN, KSCN, NH4SCN, or Ca(SCN)2 and 2,3-benzo(4'-phenylacetyl)-15-crown-5, 2,3-benzo(4'-diphenylacetyl)-15-crown-5, or 2,3-benzo(4'-diphenylacetyl)-12-crown-4 was studied calorimetrically in MeCN at 298 K. The stoichiometries (metal:ligand ratios), logarithms of stepwise equil. consts., and the heats and entropies of complexation were detd. The influence of macrocycle ring size and of substituents on the benzene ring on thermodn. parameters and complexation selectivity is discussed.