甲基橙制备实验的衍生与探索

doi:10.3866/PKU.DXHX201910009

Abstract

Abstract:

Preparation of methyl orange is regarded as a classical basic experiment in organic chemistry. Based on the derivation of methyl orange preparation, we design a mini comprehensive experiment by combining the synthetic experiment of azobenzene compounds with spectral analysis to achieve the multi-disciplinary interactions. It not only can guide students to further understand properties of azobenzene compounds, but also can help to improve the synthetic operation skills of solid organic compounds and master the spectral analysis methods. In the meantime, we hope to break the limitation of basic experimental training and make it easier for students to cultivate scientific thinking methods.

Key words: Methyl orange, Azobenzene compounds, Teaching improvement

MSC2000:

Qianxiao Wang, Shimian Li, Kun Wang, Jinmei Zhou, Lirong Lin. Derivation and Exploration of Methyl Orange Preparation Experiment[J].University Chemistry, 2020, 35(9): 132-140.

Figures/Tables 12

References 8

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溶剂	甲基黄λ (ε_max)	甲基橙λ (ε_max)	偶氮苯λ (ε_max)
乙醇	255 (2.17 × 10⁴), 404 (5.90 × 10⁴)	263 (1.04 × 10⁴), 417 (2.83 × 10⁴)	315 (2.06 × 10⁴), 436 (5.04 × 10²)
乙腈	258 (1.95 × 10⁴), 410 (5.38 × 10⁴)	261 (9.18 × 10³), 417 (2.76 × 10⁴)	315 (1.91 × 10⁴), 435(4.79 × 10²)
水	/	270 (9.46 × 10³), 464 (2.54 × 10⁴)

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Derivation and Exploration of Methyl Orange Preparation Experiment

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