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NbCl4(OCH2CH2OMe) | 1107601-58-0

中文名称
——
中文别名
——
英文名称
NbCl4(OCH2CH2OMe)
英文别名
2-Methoxyethanolate;niobium(5+);tetrachloride
NbCl4(OCH2CH2OMe)化学式
CAS
1107601-58-0
化学式
C3H7Cl4NbO2
mdl
——
分子量
309.806
InChiKey
QXSGOASIKRIBSS-UHFFFAOYSA-J
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):
    -12.99
  • 重原子数:
    10
  • 可旋转键数:
    2
  • 环数:
    0.0
  • sp3杂化的碳原子比例:
    1.0
  • 拓扑面积:
    32.3
  • 氢给体数:
    0
  • 氢受体数:
    6

反应信息

  • 作为反应物:
    描述:
    乙二醇二甲醚NbCl4(OCH2CH2OMe)氘代氯仿 为溶剂, 生成 NbOCl3(1,2-dimethoxyethane)
    参考文献:
    名称:
    铌和五氯化钽在室温下异常活化1,2-二烷氧基烷烃。
    摘要:
    MCl(5)(M = Nb,1a; M = Ta,1b)与1,2-二烷氧基烷烃[即MeO(CH(2))(2)OMe(dme),EtO(CH( 2))(2)OEt,MeOCH(2)CH(Me)OMe,MeO(CH(2))(2)OCH(2)Cl,MeO(CH(2))(2)O(CH(2) )(2)OMe(二甘醇二甲醚)]严格取决于化学计量。在1:1摩尔比的反应中,发生单个CO键断裂,导致烷基氯和配合物的形成[上部键1起始] MCl(4)[O(R)CH(R')CH(2)O ] [上键1末端] [M = Nb,R = Me,R’= H,3a;M = Ta,R = Me,R'= H,3b;M = Nb,R = Et,R'= H,5;M = Nb,R = R'= Me,6;M = Nb,R = CH(2)Cl,R'= H,7;M = Nb,R =(CH(2))(2)O(Me)NbCl(5),R'= H,
    DOI:
    10.1039/b810210d
  • 作为产物:
    描述:
    参考文献:
    名称:
    从1,2-二烷氧基烷烃到1,4-二恶烷。NbCl(5)通过在室温下多个CO键裂解介导的转化。
    摘要:
    描述了室温下聚醚(dme,二甘醇二甲醚,1,2-二乙氧基乙烷,1,2-二甲氧基丙烷)与NbCl(5)反应形成1,4-二恶烷和烷基氯的过程;就dme而言,反应主要分两个步骤进行:(i)裂解一个O-CH(3)键,然后(ii)裂解第二个O-CH(3)键和一个两个O-CH(2)链接。报告了中间体配合物的表征和NbOCl(3)(dme)的分离。
    DOI:
    10.1039/b804432e
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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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