“trans/cis-[Co(en)2Cl2]Cl配合物水解反应动力学常数测定”实验教学实施结果与探讨

doi:10.3866/PKU.DXHX202011035

Abstract

Abstract:

This paper mainly introduces the laboratory teaching implementation results and discussions of "determination of kinetic constants of the hydrolysis reaction of trans/cis-[Co(en)₂Cl₂]Cl complexes", which has been carried out for 10 years and particularly designed for top-talented chemistry-majored students at Xiamen University. Students were guided to discuss and explore the effects of reaction medium and temperature on the hydrolysis reaction of trans/cis-[Co(en)₂Cl₂]Cl, based on the dynamic experimental data and results. In light of this, students could directly understand the differences in the hydrolysis reaction kinetics behavior of trans/cis isomer with different structure, and the meaning of "structure decides the nature". Their ability of induction, summary, analysis, judgment and critical thinking can be cultivated.

Key words: trans/cis-[Co(en)₂Cl₂]Cl, Kinetics of hydrolysis reaction, Analysis and discussion of experimental results

Chunyan Zhang, Xiaoqing Ouyang, Chanzi Ruan, Yinyun Lü, Rui Pan, Yuhua Weng, Zhiqiang Dong, Zhenling Xu, Shunü Peng, Huamin Li, Yanping Ren. Laboratory Teaching Results and Discussions of "Determination of Kinetic Constants of the Hydrolysis Reaction of trans/cis-[Co(en)₂Cl₂]Cl Complexes"[J].University Chemistry, 2021, 36(8): 2011035.

Figures/Tables 12

References 7

1	欧阳小清; 张春艳; 许振玲; 潘蕊; 吕银云; 阮婵姿; 翁玉华; 董志强; 任艳平. 大学化学, 2020, 36 (4), 2005062.
2	欧阳小清; 张春艳; 潘蕊; 阮婵姿; 吕银云; 翁玉华; 董志强; 彭淑女; 李华敏; 许振玲; 任艳平. 大学化学, 2020, 36 (4), 2006069.
3	Aline O. M. ; Paolla C. M. ; Lucas B. F. R. C. ; Lucas B. B. ; Jonas P. ; Alexandre G. S. P. Quim. Nova 2006, 29 (2), 385. doi: 10.1590/S0100-40422006000200034
4	Preparatory Problems 43rd International Chemistry Olympiad 2011 Ankara, Turkey (第43届国际奥林匹克化学竞赛实验预备题, 土耳其, 2011年), Problem 31. [2020-12-19]. https://wenku.baidu.com/view/ed204423bcd126fff7050bb5.html
5	大连理工大学无机化学教研室编. 无机化学. 第5版. 北京: 高等教育出版社, 2006: 60.
6	日本化学会编. 无机化合物合成手册, 第三卷(上). 第1版. 曹惠民, 译. 北京: 化学工业出版社, 1988: 252-256.
7	章慧. 配位化学原理与应用,第1版北京: 化学工业出版社, 2009, 252- 256, 338.

t/min	中性介质		酸性介质		t/min	中性介质		酸性介质
t/min	A	ln(A₀/A_t)	A	ln(A₀/A_t)	t/min	A	ln(A₀/A_t)	A	ln(A₀/A_t)
t₀ = 0	0.600		0.570		t₆ = 60	0.557	0.074	0.542	0.050
t₁ = 10	0.589	0.019	0.565	0.009	t₇ = 70	0.551	0.085	0.537	0.060
t₂ = 20	0.581	0.032	0.559	0.019	t₈ = 80	0.544	0.098	0.533	0.067
t₃ = 30	0.575	0.042	0.556	0.025	t₉ = 90	0.540	0.105	0.530	0.073
t₄ = 40	0.569	0.053	0.551	0.034	t₁₀ = 100	0.532	0.120	0.524	0.084
t₅ = 50	0.564	0.062	0.547	0.041

T/K	中性介质				酸性介质
T/K	拟合方程	R²	k/min⁻¹	lnk	拟合方程	R²	k/min⁻¹	lnk
293	y = 6.0 × 10⁻⁴x − 0.0047	0.9967	6.0 × 10⁻⁴	−7.42	y = 4.2 × 10⁻⁴x − 0.0023	0.9960	4.2 × 10⁻⁴	−7.78
298	y = 1.1 × 10⁻³x − 0.0091	0.9978	1.1 × 10⁻³	−6.81	y = 8.2 × 10⁻⁴x + 0.0013	0.9977	8.2 × 10⁻⁴	−7.11
303	y = 2.5 × 10⁻³x − 0.0129	0.9902	2.5 × 10⁻³	−5.99	y = 1.6 × 10⁻³x − 0.0085	0.9981	1.6 × 10⁻³	−6.44
313	y = 9.3 × 10⁻³x − 0.0040	0.9966	9.3 × 10⁻³	−4.68	y = 5.8 × 10⁻³x + 0.0228	0.9953	5.8 × 10⁻³	−5.15
323	y = 2.6 × 10⁻²x − 0.0048	0.9922	2.6 × 10⁻²	−3.65	y = 1.5 × 10⁻²x + 0.0173	0.9930	1.5 × 10⁻²	−4.20
333	y = 5.6 × 10⁻²x − 0.0241	0.9992	5.6 × 10⁻²	−2.88	y = 3.4 × 10⁻²x − 0.0012	0.9970	3.4 × 10⁻²	−3.38

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[2]	Xiaoqing Ouyang, Chunyan Zhang, Zhenling Xu, Rui Pan, Yinyun Lü, Chanzi Ruan, Yuhua Weng, Zhiqiang Dong, Yanping Ren. Preparation of trans/cis-[Co(en)₂Cl₂]Cl and Determination of Hydrolysis Reaction Kinetic: A Basic Comprehensive Chemistry Experiment [J]. University Chemistry, 2021, 36(4): 2005062-.
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Laboratory Teaching Results and Discussions of "Determination of Kinetic Constants of the Hydrolysis Reaction of trans/cis-[Co(en)₂Cl₂]Cl Complexes"

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Laboratory Teaching Results and Discussions of "Determination of Kinetic Constants of the Hydrolysis Reaction of trans/cis-[Co(en)2Cl2]Cl Complexes"

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Laboratory Teaching Results and Discussions of "Determination of Kinetic Constants of the Hydrolysis Reaction of trans/cis-[Co(en)₂Cl₂]Cl Complexes"