Abstract
The cyclic tetradentate tertiary amine, 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (Me 4[14]aneN 4) reacts with alkali metal salts in THF to form [M(Me 4[14]aneN 4) (SCN)], M = Li, Na and [Li (Me 4[14]aneN 4)(H 2O)]X, X = Cl, Br. These compounds have been characterized by elemental analysis, IR, 7Li, 1H and 13C NMR spectroscopy. The complexes adopt a five-coordinate structure in which all four methyl groups of the macrocycle are magnetically equivalent. Frequency shifts in the IR spectra of the thiocyanato complexes indicate that the nitrogen end of the SCN − ligand is coordinated. A water molecule occupies the fifth coordination site in the complexes isolated as halide salts.
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