
The title compound, methyl 8-chlorobicyclo[7.1.0]deca-1,8-dien-4-yn-2-carboxylate C12H11ClO2, crystallizes with two chemically equivalent and essentially geometrically and conformationally identical molecules in the asymmetric unit. A cyclopropane ring is fused to a nine-membered ring such that it is flanked by two double bonds and the presence of a triple bond in the larger ring generates considerable strain, evidenced in the marked non-linearity of the alkyne unit [165.2 (2)-168.4 (2)° at the carbon atoms] and the wide angles within the nine-membered ring at the ring fusion atoms [153.09 (10)-155.5 (2)°].
Supporting information
![]() | Crystallographic Information File (CIF) |
![]() | Structure factor file (CIF format) |
CCDC reference: 128267