Volume 36, Issue 10 e4550
RESEARCH ARTICLE

Structure–activity relationship of alkanes and alkane derivatives for the abilities of C(sp3)H bonds toward their H-atom transfer reactions

Yan-Hua Fu

Corresponding Author

Yan-Hua Fu

College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, China

Correspondence

Yan-Hua Fu, College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China.

Email: [email protected]

Guang-Bin Shen, School of Medical Engineering, Jining Medical University, Jining, Shandong 272000, China.

Email: [email protected]

Xiao-Qing Zhu, The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Email: [email protected]

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Liguo Yang

Liguo Yang

College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, China

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Zhongyuan Zhou

Zhongyuan Zhou

College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, China

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Fang Wang

Fang Wang

College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, China

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Guang-Bin Shen

Corresponding Author

Guang-Bin Shen

School of Medical Engineering, Jining Medical University, Jining, China

Correspondence

Yan-Hua Fu, College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China.

Email: [email protected]

Guang-Bin Shen, School of Medical Engineering, Jining Medical University, Jining, Shandong 272000, China.

Email: [email protected]

Xiao-Qing Zhu, The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Email: [email protected]

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Xiao-Qing Zhu

Corresponding Author

Xiao-Qing Zhu

The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, China

Correspondence

Yan-Hua Fu, College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China.

Email: [email protected]

Guang-Bin Shen, School of Medical Engineering, Jining Medical University, Jining, Shandong 272000, China.

Email: [email protected]

Xiao-Qing Zhu, The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.

Email: [email protected]

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First published: 07 June 2023
Citations: 1

Abstract

Hydrogen atom-donating ability of alkane is a research hotspot and has been extensively studied. In this article, the second-order rate constants of 20 hydrogen atom transfer (HAT) reactions between aliphatic, benzylic, and allylic alkanes and alkane derivatives with CumO in acetonitrile at 298 K were studied. The thermo-kinetic parameter ΔG≠o(XH), bond dissociation free energy ΔGo(XH), and kinetic intrinsic resistance energy ΔGXH/X were determined and used to evaluate the H-donating abilities of these substrates in thermodynamics, kinetics, and HAT reactions. Structure–activity relationships including the factors (electronic, stereoelectronic, and steric effects), introduction of CH3, Ph, or Cl in alkanes, and introduction of N atom in cycloalkane were discussed carefully. The results show that the order of H-donating abilities is allylic alkanes > cycloalkanes > chain alkanes ≈ benzylic alkanes > haloalkanes. The introduction of CH3, Ph, or Cl in alkanes and the introduction of N atom to the carbon ring reduce ΔGo(XH) but increase ΔGXH/X, and ΔG≠o(XH) is the synthesis result of these two parameters. The reliability of ΔG≠o(XH) was verified, and the accuracy and reliability of the parameters were proved. Through the study of this paper, not only the ΔGo(XH), ΔGXH/X, and ΔG≠o(XH) of these alkanes and derivatives in HAT reaction can be quantitatively evaluated but also the structure–activity relationship of alkane is clearly researched.

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