“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

大学化学 >> 2021, Vol. 36 >> Issue (8): 2011035.doi: 10.3866/PKU.DXHX202011035

“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

张春艳, 欧阳小清, 阮婵姿, 吕银云, 潘蕊, 翁玉华, 董志强, 许振玲, 彭淑女, 李华敏, 任艳平()

化学国家级实验教学示范中心(厦门大学), 厦门大学化学化工学院, 福建厦门 361005

收稿日期:2020-11-12 录用日期:2021-01-18 发布日期:2021-02-02
通讯作者: 任艳平 E-mail:ypren@xmu.edu.cn
作者简介:任艳平, Email: ypren@xmu.edu.cn
基金资助:
教育部2020年产学合作协同育人项目(202002060029);2021年度教育部“基础学科拔尖学生培养计划2.0”研究课题(20212058)

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

Chunyan Zhang, Xiaoqing Ouyang, Chanzi Ruan, Yinyun Lü, Rui Pan, Yuhua Weng, Zhiqiang Dong, Zhenling Xu, Shunü Peng, Huamin Li, Yanping Ren()

National Demonstration Center for Experimental Chemistry Education (Xiamen University), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, China

Received:2020-11-12 Accepted:2021-01-18 Published:2021-02-02
Contact: Yanping Ren E-mail:ypren@xmu.edu.cn

摘要/Abstract

摘要：

主要介绍厦门大学专门为“化学拔尖计划”学生个性化培养“量身定制”并经10年教学实践的“trans/cis-[Co（en）₂Cl₂]Cl配合物水解反应动力学常数测定”实验教学实施结果及探讨内容。引导学生以动力学实验数据和实验结果为依据，讨论和探究了介质、温度等对trans/cis-[Co（en）₂Cl₂]Cl配合物水解反应的影响，让学生直观认识顺-反异构体配合物的结构不同，所表现的水解反应动力学的差异，了解结构决定性质的涵义，培养学生归纳、总结、分析、判断的能力以及批判性思维能力。

关键词: trans/cis-[Co(en)₂Cl₂]Cl, 水解反应动力学, 实验结果分析与探讨

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

MSC2000:

张春艳, 欧阳小清, 阮婵姿, 吕银云, 潘蕊, 翁玉华, 董志强, 许振玲, 彭淑女, 李华敏, 任艳平. “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[J]. 大学化学, 2021, 36(8): 2011035.

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.

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参考文献 7

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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

[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. trans/cis-[Co(en)₂Cl₂]Cl配合物的制备及其水解反应动力学常数测定——面向大一学生的基础型综合化学实验[J]. 大学化学, 2021, 36(4): 2005062-0.
[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. “trans/cis-[Co (en)₂Cl₂]Cl配合物的制备及其光谱鉴定”实验教学实施结果与探讨——培养学生批判性思维的典型案例之一[J]. 大学化学, 2021, 36(3): 2006069-0.

“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

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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