Synthesis, Crystal Structure, Ab Initio Studies and Fingerprint Plots of 2-Chloro-1,3-dioxo-2,3-dihydro-1H-inden-2-yl acetate
作者:Raza Murad Ghalib、Rokiah Hashim、P. S. Pereira Silva、Sayed Hasan Mehdi、Othman Sulaiman、Manuela Ramos Silva
DOI:10.1007/s10870-011-0158-8
日期:2011.11
2-Chloro-1,3-dioxo-2,3-dihydro-1H-inden-2-yl acetate, C11H7ClO4 (Fig. 1), has been synthesized and the structure has been solved by IR and X-ray diffraction studies. The crystals are triclinic, space group P $$ \bar1} $$ , with a = 7.62060(10) Å, b = 11.5944(2) Å, c = 13.0753(3) Å, α = 97.2820(10)°, β = 101.5740(10)°, γ = 101.7930(10)°, Mr = 238.62, V = 1090.82(3) Å3, Z = 4 and R = 0.0557. In the title compound there are two molecules in the asymmetric unit. The molecules are linked via weak C–H···O hydrogen bonds forming R 4 4 (28) rings. The intermolecular interactions were analysed by means of the fingerprint plots derived from the Hirshfeld surfaces. The fingerprint plots evidenced subtle differences in the intermolecular contacts for the two independent molecules. The structure of 2-chloro-1,3-dioxo-2,3-dihydro-1H-inden-2-yl acetate has two molecules in the asymmetric unit. The crystal packing is stabilized only by weak interactions. Ab nitio calculations for the free molecule show that the crystal packing has little influence on the molecular conformation.
2-
氯-1,3-二氧代-
2,3-二氢-1H-茚-2-基乙酸酯(
C11H7ClO4,图1)已经合成,并通过红外和X射线衍射研究确定了其结构。晶体为三斜晶系,空间群为P $$ \bar1} $$ ,a = 7.62060(10) Å,b = 11.5944(2) Å,c = 13.0753(3) Å,α = 97.2820(10)°,β = 101.5740(10)°,γ = 101.7930(10)°,Mr = 238.62,V = 1090.82(3) Å3,Z = 4,R = 0.0557。在标题化合物中,不对称单元中有两个分子。分子通过弱的C–H···O氢键连接形成R 4 4 (28)环。通过从Hirshfeld表面衍生的指纹图