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In the title compound C11H9BrCl2O2, which represents the Z isomer, the methylacrylate moiety is essentially planar within 0.039 (2) Å and has an extended trans configuration. The benzene ring makes a dihedral angle of 28.3 (1)° with the mean plane of the methylacrylate moiety. The crystal packing is characterized by C—H...O hydrogen bonding and halogen–halogen interactions [Cl...Cl = 3.486 (3) Å], resulting in the formation of R22(11) ring motifs and connecting the molecules into chains propagating along the b axis.