首页> 外文期刊>Molecular physics >Catalytic effect of water, water dimer, water trimer, HCOOH, H2SO4, CH3CH2COOH and HN(NO2)(2) on the isomerisation of HN(NO2)(2) to O2NNN(O)OH: a mechanism study
【24h】

Catalytic effect of water, water dimer, water trimer, HCOOH, H2SO4, CH3CH2COOH and HN(NO2)(2) on the isomerisation of HN(NO2)(2) to O2NNN(O)OH: a mechanism study

机译:水,水二聚体,水三聚体,HCOOH,H 2 SO 4,CH 3 CHOH2COOH和HN(NO2)(2)对HN(NO2)(2)至O2NNN(O)OH:一种机制研究的催化作用

获取原文
获取原文并翻译 | 示例
           

摘要

In this article, the isomerisation mechanisms of HN(NO2)(2) to O2NNN(O)OH without and with catalyst X (X = H2O, (H2O)(2), (H2O)(3), HCOOH, H2SO4, CH3CH2COOH and HN(NO2)(2)) have been investigated theoretically at the CBS-QB3 level of theory. Our results show that the catalyst X (X = H2O, (H2O)(2), (H2O)(3), HCOOH, H2SO4 and CH3CH2COOH) shows different positive catalytic effects on reducing the apparent activation energy of the isomerisation reaction processes. Such different catalytic effects are mainly related to the number of hydrogen bonds and the size of the ring structure in X (X = H2O, (H2O)(2) and (H2O)(3))-assisted transition states, as well as different values of pK(a) for H2SO4, HCOOH and CH3CH2COOH. Very interesting is also the fact that H2SO4-assisted reaction is the most favourable for the hydrogen transfer from HN(NO2)(2) to O2NNN(O)OH, due to the smallest pK(a) (-3.0) value of H2SO4 than H2O, HCOOH, H2SO4 and CH3CH2COOH, and also because of the largest ?X center dot center dot center dot H center dot center dot center dot Y (the angle between the hydrogen bond donor and acceptor) involved in H2SO4-assisted transition state. Compared to the self-catalysis of the isomerisation mechanisms of HN(NO2)(2) to O2NNN(O)OH, the apparent activation energy of H2SO4-assisted channel also reduces by 9.6kcalmol(-1), indicating that H2SO4 can affect the isomerisation of HN(NO2)(2) to O2NNN(O)OH, most obvious among all the catalysts H2O, (H2O)(2), (H2O)(3), HCOOH, H2SO4, CH3CH2COOH and HN(NO2)(2).
机译:在本文中,HN(NO 2)(2)至O 2 NNNN(O)OH的异构化机制哦,致催化剂X(X = H 2 O,(H 2 O)(2),(H 2 O)(3),HCOOH,H 2 SO 4,CH 3 CH 2 COOH理论上已经在CBS-QB3理论水平上研究了HN(NO2)(2))。我们的结果表明,催化剂X(X = H 2 O,(H 2 O)(2),(H 2 O)(3),HCOOH,H 2 SO 4和CH 3 CH 2 COOH表示对降低异构化反应过程的表观活化能量的不同阳性催化作用。这种不同的催化作用主要与X(X = H 2 O,(H 2 O)(2)和(3))辅助转变状态以及不同的氢键的氢键数和环结构的尺寸相关。 H2SO4,HCOOH和CH 3 COOH的PK(A)的值。非常有趣的是,由于H2SO4的最小PK(A)(-3.0)值,H2SO4辅助反应是来自HN(NO2)(2)至O 2 NNNN(O)OH的氢转移最有利的。 H2O,HCOOH,H2SO4和CH3CH2COOH,以及由于最大的X中心点中心点中心点H中心点中心点中心点Y(氢键供体与受体之间的角度)参与H2SO4辅助过渡状态。与HN(NO2)(2)至O 2NN(O)OH异构化机制的自催化相比,H 2 SO 4辅助通道的表观活化能量也通过9.6kcalmol(-1),表明H2SO4可以影响所有催化剂H2O,(H 2 O)(2),(3),HCOOH,H 2 SO 4,CH 3 CH 2 COOH和HN(NO2)(2℃)(2 )。

著录项

  • 来源
    《Molecular physics》 |2017年第14期|共9页
  • 作者单位

    Shaanxi Univ Technol Shaanxi Key Lab Catalysis Sch Chem &

    Environm Sci Hanzhong Shaanxi Peoples R China;

    Shaanxi Univ Technol Shaanxi Key Lab Catalysis Sch Chem &

    Environm Sci Hanzhong Shaanxi Peoples R China;

    Shaanxi Univ Technol Shaanxi Key Lab Catalysis Sch Chem &

    Environm Sci Hanzhong Shaanxi Peoples R China;

    Shaanxi Univ Technol Shaanxi Key Lab Catalysis Sch Chem &

    Environm Sci Hanzhong Shaanxi Peoples R China;

    Shaanxi Univ Technol Shaanxi Key Lab Catalysis Sch Chem &

    Environm Sci Hanzhong Shaanxi Peoples R China;

    Shaanxi Univ Technol Shaanxi Key Lab Catalysis Sch Chem &

    Environm Sci Hanzhong Shaanxi Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分子物理学;
  • 关键词

    HN(NO2)(2); catalyst; isomerisation mechanism; positive catalytic effect;

    机译:HN(NO2)(2);催化剂;异构化机制;阳性催化作用;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号