2－呋喃甲酸锶的晶体结构

Crystal Structure of Strontium 2-Furancarboxylate

在水溶液中合成并培育了２－呋喃甲酸锶Ｓｒ６（Ｃ５Ｈ３Ｏ３）１２单晶。经元素分析、红外光谱、差热热重分析、密度测定以及Ｘ射线衍射结构分析确定了该化合物的组成、结构和部分性质。结构分析结果表明：该晶体属单斜晶系，空间群Ｐ２１／ｎ，ａ＝２．３０９０（７）ｎｍ，ｂ＝１．３３７６（４）ｎｍ，ｃ＝２．３０９３（６）ｎｍ，β＝１０７．０６（２）°，Ｚ＝４，Ｒ＝０．０６０３．Ｄｃ＝１．８２×１０＾３ｋｇ／ｍ＾３，

The single crystal of strontium 2-furancarboxylate Sr6(C_5H_3O_3)_(12)has been synthesized and grew in the aqueous solution and characterized by elementary analysis,IR spectra,density,DTA and TG,The structure of this compound is determined by X-ray single crystal diffraction analysis.The crystallographic data are as follows:monoclinic,space group P2_1/n,a=2.3090(7)nm,b=1.3376(4)nm,c=2.3093(6)nm,β=107.06(2)°,Z=4,R =0. 060 3. Dc=1.82×103 kg/m3,Dm=1.81×103 kg/m3.The 2-furancarboxyl groups in the compound are connected with the strontium ions through the oxo-bridging and then three-dimensional network is fromed.The average value of bond length of Sr─O is 0.264 1nm;but they are 0.253 5 nm and 0.286 1 nm when the oxygen atoms are from carboxyl group and furan nucleus respectively.