W. Radeckaparyzek et E. Luks, THE DIOXOURANIUM(VI) ION AS A TEMPLATE FOR THE SYNTHESIS OF HEXAAZA TETRADENTATE MACROCYCLIC LIGAND, Polyhedron, 13(6-7), 1994, pp. 899-901
The macrocyclic tetradentate N,N,N,N, donor dioxouranium nitrate compl
ex of formula [UO2L](NO3)2 . 2H20, (where L is ,11,14-tetramethyl-3,4,
12,13,19,20-hexaazatricyclo ]eicosa-1(19),2,4,6,8,10(20),11,13,15,17-d
ecaene), has been prepared by the condensation of 2,6-diacetylpyridine
with hydrazine in the presence of a metal ion template and characteri
zed by IR, UV-vis, H-1 NMR and MS data. The 2,6-diacetylpyridine dioxo
uranium nitrate complex isolated as minor product is regarded as a pos
sible intermediate in the condensation reaction leading to the formati
on of the macrocyclic complex.