Rodopoulos, Theo, Ishihara, Koji, Rodopoulos, Mary, Zaworotko, M., Maeder, Marcel, McAuley, A.. National Research Council; 2005. Synthesis and reactivity of the macrobicyclic complexes (1,5,8,12-tetraaza-17-oxabicyclo 10.5.2 nonadecane)cobalt(III) perchlorate ( Co(L-1)(ClO4) (ClO4)(2)), (chloro(1,4,8,11-tetraaza-17-oxabicyclo 9.5.3 nonadecane)cobalt(III) perchlorate ( Co(L-2)(Cl) (ClO4)(2)), (4,8-dimethyl-1,4,8,11-tetraaza-17-oxabicyclo 9.5.3 nonadecane)cobalt(II I) perchlorate ( Co(L-3)(ClO4) (ClO4)(2)), and (5,8-dimethyl-1,5,8,12-tetraaza-17-oxabicyclo 10.5.2 nonadecane)cobalt(I II) perchlorate ( Co(L-4)(ClO4) (ClO4)(2)) - Crystal structure of the L-2 complex.