Crystal structure and theoretical studies of two π-conjugated fused-ring chalcones: ()-1-(anthra-cen-9-yl)-3-(9-ethyl-9-carbazol-3-yl)prop-2-en-1-one and ()-1-(anthracen-9-yl)-3-[4-(9-carbazol-9-yl)phen-yl]prop-2-en-1-one

Crystal structure and theoretical studies of two π-conjugated fused-ring chalcones: ()-1-(anthra-cen-9-yl)-3-(9-ethyl-9-carbazol-3-yl)prop-2-en-1-one and ()-1-(anthracen-9-yl)-3-[4-(9-carbazol-9-yl)phen-yl]prop-2-en-1-one