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Ru(II)imH | 1003017-35-3

中文名称
——
中文别名
——
英文名称
Ru(II)imH
英文别名
Ru(II)(acac)2(py-imH);[Ru(II)(2,4-pentanedionato)2(2-(2'-pyridyl)imidazole)];Ru(II)(2,4-pentanedionato)2(2-(2'-pyridyl)imidazole);[Ru(2,4-pentanedionato)2(2-(2'-pyridyl)imidazole)]
Ru(II)imH化学式
CAS
1003017-35-3
化学式
C18H21N3O4Ru
mdl
——
分子量
444.452
InChiKey
IVUDXQUMUJYNII-UHFFFAOYSA-N
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

  • 作为反应物:
    描述:
    Ru(II)imH2,2,6,6-四甲基哌啶氧化物 作用下, 以 乙腈 为溶剂, 生成 Ru(III)(acac)2(py-im)
    参考文献:
    名称:
    钌咪唑配合物的氢原子转移反应:氢隧道和马库斯交叉关系的适用性
    摘要:
    Ru(II)(acac)2(py-imH) (Ru(II)imH) 与 TEMPO(*)(2,2,6,6-四甲基哌啶-1-氧基自由基)在 MeCN 中反应,定量得到 Ru( III)(acac)2(py-im) (Ru(III)im) 和通过转移 H(*) (H(+) + e(-)) 得到的羟胺 TEMPO-H (acac = 2,4-戊二酮,py-imH = 2-(2'-吡啶基)咪唑)。通过 UV-vis 停流技术对该反应进行的动力学测量表明,298 K 下的双分子速率常数 k(3H) = 1400 +/- 100 M(-1) s(-1)。该反应通过协调的氢原子进行转移(HAT)机制,如通过排除初始质子或电子转移的逐步路径所示,由于它们非常不利的热化学(Delta G(o))。氘从 Ru(II)(acac)2(py-imD) (Ru(II)imD) 到 TEMPO(*) 的转移在 k(3D)
    DOI:
    10.1021/ja805067h
  • 作为产物:
    描述:
    cis-bis(acetonitrile)bis(acetylacetonato)ruthenium(II) 、 2-(咪唑-2-基)吡啶 为溶剂, 以78%的产率得到Ru(II)imH
    参考文献:
    名称:
    用于氢原子转移的双(β-二酮)钌吡啶-咪唑配合物的合成和表征。
    摘要:
    双(β-二酮)钌配合物已在 RuII 和 RuIII 氧化水平下与质子化和去质子化的吡啶-咪唑配体制备。RuII(acac)2(py-imH) (1)、[RuIII(acac)2(py-imH)]OTf (2)、RuIII(acac)2(py-im) (3)、RuII(hfac)2 (py-imH) (4) 和 [DBU-H][RuII(hfac)2(py-im)] (5) 已得到充分表征,包括 X 射线晶体结构(acac = 2,4-pentanedionato, hfac = 1,1,1,5,5,5-六氟-2,4-戊二酮,py-imH = 2-(2'-吡啶基)咪唑,DBU = 1,8-二氮杂双环[5.4.0]十一碳- 7-烯)。对于 acac-咪唑配合物 1 和 2,MeCN 中的循环伏安法显示 RuIII/II 还原电位 (E1/2) 相对于 Cp2Fe+/0 为 -0.64 V。去质子化咪唑复合物
    DOI:
    10.1021/ic7015726
  • 作为试剂:
    描述:
    参考文献:
    名称:
    钌咪唑配合物的氢原子转移反应:氢隧道和马库斯交叉关系的适用性
    摘要:
    Ru(II)(acac)2(py-imH) (Ru(II)imH) 与 TEMPO(*)(2,2,6,6-四甲基哌啶-1-氧基自由基)在 MeCN 中反应,定量得到 Ru( III)(acac)2(py-im) (Ru(III)im) 和通过转移 H(*) (H(+) + e(-)) 得到的羟胺 TEMPO-H (acac = 2,4-戊二酮,py-imH = 2-(2'-吡啶基)咪唑)。通过 UV-vis 停流技术对该反应进行的动力学测量表明,298 K 下的双分子速率常数 k(3H) = 1400 +/- 100 M(-1) s(-1)。该反应通过协调的氢原子进行转移(HAT)机制,如通过排除初始质子或电子转移的逐步路径所示,由于它们非常不利的热化学(Delta G(o))。氘从 Ru(II)(acac)2(py-imD) (Ru(II)imD) 到 TEMPO(*) 的转移在 k(3D)
    DOI:
    10.1021/ja805067h
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文献信息

  • Trends in Ground-State Entropies for Transition Metal Based Hydrogen Atom Transfer Reactions
    作者:Elizabeth A. Mader、Virginia W. Manner、Todd F. Markle、Adam Wu、James A. Franz、James M. Mayer
    DOI:10.1021/ja8081846
    日期:2009.4.1
    Reported herein are thermochermical studies of hydrogen atom transfer (HAT) reactions involving transition metal H-atom donors (MLH)-L-II and oxyl radicals. [Fe-II(H(2)bip)(3)](2+), [Fe-II(H(2)bim)(3)](2+), (Co-II(H(2)bim)(3))(2+), and Ru-II(acac)(2)(py-imH) [H(2)bip = 2,2'-bi-1,4,5,6-tetrahydropyrimidine, H(2)bim = 2,2'-bi-imidazoline, acac = 2,4-pentandionato, py-imH = 2-(2'-pyridyl)imidazole)] each react with TEMPO (2,2,6,6-tetramethy-1-piperidinoxyl) or (Bu3PhO center dot)-Bu-t (2,4,6-tri-tert-butylphenoxyl) to give the deprotonated, oxidized metal complex (ML)-L-III and TEMPOH or (Bu3PhOH)-Bu-t. Solution equilibrium measurements for the reaction of [Co-II(H(2)bim)(2+) with TEMPO show a large, negative ground-state entropy for hydrogen atom transfer, -41 +/- 2 cal mol(-1) K-1. This is even more negative than the Delta S degrees(HAT) = -30 +/- 2 cal mol(-1) K-1 for the two iron complexes and the Delta S degrees(HAT) for Ru-II(acac)(2)(py-imH) + TEMPO, 4.9 +/- 1.1 cal mol(-1) K-1, as reported earlier. Calorimetric measurements quantitatively confirm the enthalpy of reaction for [Fe-II(H(2)bip)(3)](2+) + TEMPO, thus also confirming Delta S degrees(HAT). Calorimetry on TEMPOH + (Bu3PhO center dot)-Bu-t gives Delta H degrees(HAT) = -11.2 +/- 0.5 kcal mol(-1) which matches the enthalpy predicted from the difference in literature solution BDEs. A brief evaluation of the literature thermochemistry of TEMPOH and (Bu3PhOH)-Bu-t supports the common assumption that I Delta S degrees(HAT) approximate to 0 for HAT reactions of organic and small gas-phase molecules. However, this assumption does not hold for transition metal based HAT reactions. The trend in magnitude of I Delta S degrees I-HAT for reactions with TEMPO, Ru-II(acac)(2)(Py-imH) << (Fe-II(H(2)bip)(3)](2+) = [Fe-II(H(2)bim)(3)](2+) < [Co(II)bim)(3)](2+), is surprisingly well predicted by the trends for electron transfer half-reaction entropies, Delta S degrees(ET), in aprotic solvents. This is because both Delta S degrees(ET) and Delta S degrees(HAT) have substantial contributions from vibrational entropy, which varies significantly with the metal center involved. The close connection between Delta S degrees(HAT) and Delta S degrees(ET) provides an important link between these two fields and provides a starting point from which to predict which HAT systems will have important ground-state entropy effects.
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