| 三核钼原子簇化合物研究——(Me4N)[Mo3(μ3-O)(μ-Br)3(μ-O2CH)3Cl3]的合成和晶体结构 |
| STUDIES ON TRINUCLEUS Mo CLUSTER COMPOUND SYNTHESIS AND CRYSTAL STRUCTURE OF (Me N) [Mo3(u3-O)(μ-Br)3(μ-O2CH)3Cl3] |
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| 摘要: (Me4N)[Mo3(μ3-O)(μ-Br)3(μ-O2CH)3Cl3)晶体是在介质HCl-EtOH中,通过MoBr3、甲酸和Me4NBr进行反应制得。由X射线单晶结构分析,空间群为P1,晶胞参数:a=6.848(1),b=11.933(1),c=13.164(1)(?),α=100.20(1),β=93.12(1),γ=104.14(1)(°);z=2;Dobs.=2.72gcm-3,Dcalc.=2.76gcm-3。研究表明,晶体属离子型,由(Me4N)+阳离子和簇阴离子 [Mo3(μ3-O)(μ-Br)3(μ-O2CH)3Cl3]- 组成。簇阴离子中,μ3-O原子桥联以等边三角形排布的三核钼簇胳,成为单氧帽钼簇阴离子。每对钼原子间另有—(μ-O2CH)基和一个Br原子作双向桥配体,此外,每个钼原子又有一端基Cl原子配位,使得在每个Mo原子周围形成畸变八面体构型。整个簇阴离子具近似C3Ⅴ对称性。 |
| 关键词: 三核钼原子簇化合物 晶体结构 |
| 基金项目: |
| Abstract: The brown-black crystal of the title Mo cluster compound was synthesized by the reaction of MoBr3 and HCO2H with Me4NBr in the medium of unhydrous EtOH saturated by gas HCl. The crystal structure with space group Pi has been determined by means of X-ray single crystal structure analysis method. The unit cell parameters are as follows: a=6.848(1),b= 11.933(1), c= 13.164(1)Å,a= 100.20(1), β= 93.12(1)°, r=101.14(1) (°); Z=2; Dobs=2.72gcm-3, Dcalc.=2.76gcm-3. The results show that the crystal belongs to a discrete ionic one, containing an (Me4N)+ cation and an [Mo3(μ3-O)(μ-Br)3(μ-O2CH)3Cl3]- cluster anion, in which three Mo atoms form an approximately equilateral triangle with an average Mo-Mo bond length of 2.596(1)Å. On one side of the triangular plame one μ3-O atom binds the three Mo atoms together to form a monocapoed cluster core. Each pair of Mo atoms is further bridged by a Br ligand and an HCO2- group. In addition, there is a terminal Cl atom attaching to each Mo atom. The local coordination polyhedron around each Mo atom is a distored octahedron. The symmetry of the cluster anion as a whole is approximately C3v. |
| Keywords: trinucleus Mo cluster compound crystal structure |
| 投稿时间：1985-10-11 |
| 摘要点击次数: 1719 |
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| 吴鼎铭,黄建全,黄金陵.三核钼原子簇化合物研究——(Me4N)[Mo3(μ3-O)(μ-Br)3(μ-O2CH)3Cl3]的合成和晶体结构[J].无机化学学报,1986,2(4):50-58. |
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