Crystal structure of (Z)-7-t-Butyl-5-methoxy-3-[(Z)-2'-methoxy-5',5'-dimethyl-4'-oxohex-2'-enylidene]benzofuran-2(3H)-one

The crystal structure of the title compound, C₂₂H₂₈O₅, has been determined by single-crystal X-ray diffraction at 295 K and refined by least squares to a residual of 0.075 (2101 ‘observed’ reflections). Crystals are triclinic, P1Ī, a 13.789(4), b 11.461(4), c 7.027(3) Å, α 81.70(3), β 107.18(2), γ 99.10(3)°, Z 2. The structure is shown to be the Z, Z isomer, and its geometry is compared with that of the E, E isomer reported previously.