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NbOBr3(dme) | 1310341-83-3

中文名称
——
中文别名
——
英文名称
NbOBr3(dme)
英文别名
NbOBr3(1,2-dimethoxyethane)
NbOBr<sub>3</sub>(dme)化学式
CAS
1310341-83-3
化学式
C4H10Br3NbO3
mdl
——
分子量
438.74
InChiKey
CMTSPDDQZOSPQF-UHFFFAOYSA-K
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    None
  • 重原子数:
    None
  • 可旋转键数:
    None
  • 环数:
    None
  • sp3杂化的碳原子比例:
    None
  • 拓扑面积:
    None
  • 氢给体数:
    None
  • 氢受体数:
    None

反应信息

  • 作为产物:
    描述:
    乙二醇二甲醚niobium oxytribromide甲苯 为溶剂, 反应 0.5h, 以70%的产率得到NbOBr3(dme)
    参考文献:
    名称:
    氧化铌(IV)卤化物的配位化合物,包括NHC配合物的合成和晶体学表征
    摘要:
    NbOX 3与SnBu 3 H的1:1摩尔反应,在氧气/氮气供体存在下于0°C的甲苯中,导致形成NbOX 2 L 2(X = Cl,L 2 = dme,2a ; X = Br,L 2= dme,2b; X = Cl,L = thf,2c; X = Cl,L = NCMe,2d; dme = 1,2-二甲氧基乙烷,thf =四氢呋喃),收率良好。新鲜制备的2d和2b与庞大的NHC配体1,3-双(2,4,6-三甲基苯基)咪唑-2-亚烷基,Imes和1,3-双(2,6-二甲基苯基)的1:2反应)咪唑-2-亚基,己基分别提供了NbOCl复合物2(艾姆斯)2,3,和NbOBr 2(Ixyl)2,4,在50-60%的产率。2b与NaOR在四氢呋喃中的反应以约60%的收率得到NbOCl(OR)(R = Ph,5 ; R = Me,6)。所有产品均通过分析和光谱技术表征;此外,进行了DFT计算,以了解合成
    DOI:
    10.1021/acs.inorgchem.5b02888
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文献信息

  • Further insights into the chemistry of niobium and tantalum pentahalides with 1,2-dialkoxyalkanes: Synthesis of bromo- and iodoalkoxides, spectroscopic and computational studies
    作者:Riccardo Bini、Fabio Marchetti、Guido Pampaloni、Stefano Zacchini
    DOI:10.1016/j.poly.2011.03.005
    日期:2011.5
    The room temperature reactions of a series of 1,2-dialkoxyalkanes ROCH2CH(R')OR" with MX5 (M = Nb, Ta; X = Br, I) in 1:1 ratio result in single C-O bond cleavage and high-yield formation of the halo-alkoxides MBr4[K-2-OCH2CH(R')OR"] or [Nbl(4)K-1-OCH2CH(R')OR")](2), and equimolar amounts of the corresponding alkyl halides RX. The reaction of NbBr5 with 1,2-climethoxyethane, dme, proceeds with preliminary formation of the ionic species (NbBr4(K-2-dme)(K-1-dme)][NbBr6], 3b, which has been identified by solution NMR at low temperature and conductivity analyses. The gas-phase structure of 3b has been optimized by DFT calculations, confirming that the dme ligands adopt bidentate and monodentate coordination, respectively. Although the formation of NbOBr3(dme), 4b, 1,4-dioxane and MeBr from NbBr5/dme (ratio 1:2) is an exoergonic process (calculated Delta G(r)(degrees) = -115.96 kcal mol(-1)), it is inhibited at room temperature. High temperature conditions enhance the production of 1,4-dioxane at the expense of selectivity. The dinuclear species NbOBr3(dme)NbBr5 (Nb-O-Nb), 5b, (X-ray) has been isolated in modest yield as byproduct of the room temperature reaction of NbBr5 with dme. In general, the 1:2 molar reactions of NbX5 (X = Br. I) with ROCH2CH(R')OR" occur with the exclusion of nearly one equivalent of organic reactant. (C) 2011 Elsevier Ltd. All rights reserved.
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