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The protonation constants of the ligand 3,6,9,16,19,22-hexaazatricyclo[22.2.2.2 11,14 ]triaconta-1(26),11(12),13, 24,27, 29-hexaene (L, BPXD) have been determined in water at 25 o C by potentiometric procedures and indicate a lower basicity than that corresponding to the analogue ligand with m-xylyl spacers between the diethylenetriamine subunits (BMXD). The crystal...
The effect of added KBr and KSCN on the stability constants of the mono and binuclear Cu(II) complexes with a symmetrical hexaazamacrocycle L has been examined in 0.1 M KNO 3 . The presence of these salts does not cause any change in the ligand protonation constants, which indicates that, in the presence of 0.1 M KNO 3 , there is not preferential interaction of the Br − and...
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