ABSTRACT: In the title compounds, C25H29BrN5O7, (I) [systematic name: (Z)-1(5)-bromo-3(2),3(2)-dimethyl-2(1)-nitro-2(2),2(3),2(5),2(6),2(7),2(7a),3(3a),3(5),3(6),3(6a)-deca-hydro-2(1) H,6(1) H-4,9-dioxa-2(3,2)-pyrrolizina-6(4,1)-triazola-3(5,6)-furo[2,3-d][1,3]dioxola-1(1,2)-benzena-cyclo-nona-phane], and C24H29N5O7S, (II) [systematic name: (Z)-3(2),3(2)-dimethyl-2(7)-nitro-2(5),2(6),2(7),2(7a),3(3a),3(5),3(6),3(6a)-octa-hydro-2(1) H,2(3) H,6(1) H-4,9-dioxa-2(5,6)-pyrrolo-[1,2-c]thia-zola-6(4,1)-triazola-3(5,6)-furo[2,3-d][1,3]dioxola-1(1,2)-benzena-cyclo-nona-phane], the triazole rings adopt almost planar conformations. In (I), the fused pyrrolidine rings adopt envelope conformations with the C atoms opposite the fused N-C bond as the flap in each ring, and their mean planes are inclined to one another by 52.8 (3)°. In (II), the pyrrolidine and thia-zole rings are both twisted on the fused N-C bond, and their mean planes are inclined to one another by 70.8 (2)°. In both (I) and (II), the furan ring adopts an envelope conformation with the adjacent C atom of the macrocycle as the flap. In the crystal of (I), mol-ecules are linked via C-H⋯N and C-H⋯O hydrogen bonds, forming sheets parallel to (10-1), while in (II), mol-ecules are linked via C-H⋯N and C-H⋯O hydrogen bonds, forming helical chains propagating along [010], which are linked via C-H⋯S hydrogen bonds, forming slabs parallel to (001).
