Complexation of Alkali Metal Ions by the Cryptand 4, 7, 13, 16-Tetraoxa-1, 10-Tiazabicyclo[8.8.5]Tricosane, C22C5. A structural and Equilibrium Study

Abstract

The crystal structures of the cryptates formed between 4, 7, 13, 16-tetraoxa-l, 10-diazabicyclo[8.8.5]tricosane and three monovalent cations, [M.C22C5]ClO4, have been determined. [H3O.C22C5]ClO4, C17H37ClN2O9, crystallizes in the monoclinic space group P21/n with unit cell dimensions a=14.166 (2) Å, b=10.955 (2) Å, c =15.007 (1) Å, and V = 2286.5 Å3 with Z = 4. The structure was refined by a full-matrix least-squares procedure to final R =0.077 and Rw = 0.086 for 2006 reflections with I > 2.5σ(I). [K.C22C5]ClO4, C17H34ClKN2O8, crystallizes in the triclinic space group PÎ with unit cell dimensions a =13.596 (2) Å, b= 15.241(2) Å, c =11.765 (1)Å, α = 100.12 (1)°, β = 98.52 (1)°, γ = 100.66 (1)..