A new compound(E)-2,3-dihydro-2-(1,2-dihydroinden-3-ylidene)-inden-1-one has been synthesized by the aldol condensation reaction of 1-indanone at n-butyl lithium in absolute ether,and its molecular structure was characterized by elemental analysis,IR spectrum,1 HNMR and 13CNMR.The crystal structure of compound was determined by X-ray single crystal diffraction.Crystal data:orthorhombic system,space group P2(1)2(1)2(1),a=0.534 89(19)nm,b=1.810 8(6)nm,c=2.693 6(9)nm,α=β=γ=90°,V=2.609 0(15)nm3,Dc=1.254g/cm3,μ=...