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无机化学绪论-无机化学-中国科技大学-00.pdf

发布:2017-05-18约1.14万字共5页下载文档
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绪 论 Introduction 我的宗旨: To our students, whose enthusiasm and curiosity have often inspired us, and whose questions and suggestions have sometimes taught us. 一、Chemistry ── the Central Science Chemistry has often been called the central science, because a basic knowledge of chemistry is essential for the study of biology, physics, geology, ecology and many other subjects. 1 .二十世纪,特别是二十世纪后期,化学有了突飞猛进的发展。 (1) 冠醚(crown ether )的发现(The discovery of crown ether ): 第一个冠醚的发现纯属偶然。工业化学家(杜邦公司)C. J. Pedersen 要从一种单基保 护邻苯二酚(1)与二氯二乙醚(2 )制备双苯酚(3 ): OH OH HO Cl Cl + (邻羟基苯氧基 O O O O O  -乙基醚) (1) (2) O (3) 当用了稍微不纯的化合物(1)(含有一些未经保护的酚) ,还得到了非常少的(0.4% )六醚(4) O O O (二苯并(18)冠醚-6 ) O O O (4 ) KMnO4 可溶于其中,呈紫红色,他又合成了 O O O O O O O O O O O O 12 O 15 21 24 O O O O O O O O O O O
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