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《高等学校化学学报》2014,(2)
正有机化学总结、复习与提高:重点·难点·习题精解(第二版)有机化学所包含的知识面广,知识点多,学生学习相对困难。为此本书作者根据多年的教学经验,把有机化学教学中的重点、难点及学生容易出现问题的知识点进行了归纳、总结和梳理。全书分别从结构与性质、反应机理、制备反应、化学合成、波谱解析五个专题,对有机化学的基本理论、重点、难点进行了分析和总结,并对某些知识点有所拓宽和加深;同时针对这些知识点编写了相应的习题,并给出详细的解答,可以起到复习、巩固、提高以及备考的作用。 相似文献
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介绍了大学有机化学“强理念、重思维、活课堂、共育人、乐钻研”五维度教学新策略的内涵与实践。以线下教学为主,腾讯会议和慕课为辅助,践行“有机化学是科学也是艺术”的教学理念;采用多循环“疑探式”教学方式,辨析亲电试剂和亲核试剂的多样性;注重培养学生多种科学思维的综合运用;强化“文献预习”“练习讲解”“综合作业”“师生互动”等多个教学环节,加深学生对知识的理解与应用,提升学生在课堂中的参与度,着重培养学生的科学思维和人文素养、自主学习与团队合作精神。 相似文献
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初次教有机化学这一部分时,由于对教材和大綱的钻研不够,以致对教材的系统性和重点、难点掌握不住,只能照着课文顺序讲下去。所以学生在学了有机化学后,对于正确写出有机化合物的结构式,特别感觉困难。由于学生没有抓住关键,所以在写结构式时,就乱拼乱凑,写得是否正确自己没有把握,结果造成许多错误。我针对这种情次进行了深入地分析,找出了在教学上存在的主要问题是: 1.我只是在有机化学的开始时,孤立地讲解了布特列洛夫的化学结构学说的内容,以后就没有把它应用于实际和贯徹到其他的章节中去。 2.对于各类有机化合物分子结构的特点没有重点突出。 3.对于容易混淆的部分没有进行对比。上述三个问题的产生主要是由于对大纲和教材的 相似文献
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近年来,提倡大学教学要着重培养学生的能力,我们在基础有机化学课的教学中贯彻了这一精神。我们采用了“一线四点两要求”的课堂教学法。所谓“四点”是指教师讲解每一章的联接点、重点、难点和生长点。联接点是指这一章在整个学科中的地位,前后关连的部分;所谓重点是指本章的核心要点;难点是学生自学中难以理解和掌握的部分;生长点则是本章内容与学科前沿的理论研究或应用开发的设计思维之间的关系。两要求是:要求学生在学到本学科系统知识框架的同时,还要学到研究这些内容的思维方法。 相似文献
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Areas of fusion and crystallization peaks of K3TaO2F4 and KTaF6 were measured using the DSC mode of a high-temperature calorimeter (SETARAM 1800 K). On the basis of these quantities, considering
the temperature dependence of the calorimeter sensitivity, values of the fusion enthalpy of K3TaO2F4 at the fusion temperature of 1181 K of (43 ± 4) kJ mol−1 and of KTaF6 at the fusion temperature of 760 K of (8 ± 1) kJ mol−1 were determined. 相似文献
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V. M. Novotortsev S. F. Marenkin I. V. Fedorchenko A. V. Kochura 《Russian Journal of Inorganic Chemistry》2010,55(11):1762-1773
The results of studying phase equilibria of ternary AIIBIVCV systems have been reported. Physicochemical foundations have been developed for the synthesis of new ferromagnets with Curie
temperatures above room temperature structurally compatible with basic semiconducting materials. Methods of synthesis and
physicochemical properties of manganese-doped AIIBIVC2V ferromagnets have been described. The results of theoretical simulation of magnetic properties have been considered and basic
approaches to the explanation of the emergence of ferromagnetism in AIIBIVC2V doped with 3d metals have been surveyed. The most promising ways to produce and study dilute magnetic semiconductors as spintronics materials
have been presented. 相似文献
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Areas of fusion and crystallization peaks of K3NbO2F4 were measured using the DCS mode of a high-temperature calorimeter (SETARAM 1800 K). On the basis of these quantities, considering
the temperature dependence of the calorimeter sensitivity, the value of the fusion enthalpy of K3NbO2F4 of (98 ± 6) kJ mol−1 was determined at the fusion temperature of 1257 K. 相似文献
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I. E. Zanin K. B. Aleinikova M. M. Afanasiev M. Yu. Antipin 《Journal of Structural Chemistry》2004,45(5):844-848
The structure of Zn3P2 (P 42/nmc, a = b = 8. 0785 Å, c = 11. 3966 Å) was solved and refined to R = 3. 2% in a precision X-ray diffraction experiment (λ-MoK
a, graphite monochromator on a primary beam, 27,496 reflections) . Interatomic distances and bond angles have been determined. The fcc lattice of the structure is built from phosphorus atoms, and the zinc atoms occupy 3/4 of all tetrahedral voids; the structure is described by two equivalent models where 1/4 occupied (by zinc atoms) and 1/4 vacant voids change places. The zinc atoms that occupy the voids following the diamond principle do not change places.Original Russian Text Copyright © 2004 by I. E. Zanin, K. B. Aleinikova, M. M. Afanasiev, and M. Yu. Antipin__________Translated from Zhurnal Strukturnoi Khimii, Vol. 45, No. 5, pp. 889–892, September–October, 2004. 相似文献
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Aleksandra Yu. Tarasova Yu. V. Seryotkin V. M. Pashkov Ludmila I. Isaenko 《Journal of Thermal Analysis and Calorimetry》2011,104(2):795-796
The temperature dependence of unit cell parameters for monoclinic KPb2Cl5 and tetragonal RbPb2Br5 crystals was studied in the range of 100–298 K. Linear and volume thermal expansion coefficients were determined. 相似文献
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Russell G. Baughman Kenneth L. Martin Rajendra K. Singh James O. Stoffer 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(2):o103-o106
In 2,4‐dihydroxybenzaldehyde 2,4‐dinitrophenylhydrazone N,N‐dimethylformamide solvate {or 4‐[(2,4‐dinitrophenyl)hydrazonomethyl]benzene‐1,3‐diol N,N‐dimethylformamide solvate}, C13H10N4O6·C3H7NO, (X), 2,4‐dihydroxyacetophenone 2,4‐dinitrophenylhydrazone N,N‐dimethylformamide solvate (or 4‐{1‐[(2,4‐dinitrophenyl)hydrazono]ethyl}benzene‐1,3‐diol N,N‐dimethylformamide solvate), C14H12N4O6·C3H7NO, (XI), and 2,4‐dihydroxybenzophenone 2,4‐dinitrophenylhydrazone N,N‐dimethylacetamide solvate (or 4‐{[(2,4‐dinitrophenyl)hydrazono]phenylmethyl}benzene‐1,3‐diol N,N‐dimethylacetamide solvate), C19H14N4O6·C4H9NO, (XII), the molecules all lack a center of symmetry, crystallize in centrosymmetric space groups and have been observed to exhibit non‐linear optical activity. In each case, the hydrazone skeleton is fairly planar, facilitated by the presence of two intramolecular hydrogen bonds and some partial N—N double‐bond character. Each molecule is hydrogen bonded to one solvent molecule. 相似文献
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L. E. Derlyukova M. V. Vinokurova T. A. Anufrieva 《Russian Journal of Inorganic Chemistry》2008,53(9):1371-1375
The reaction of Bi2O3 + Fe2O3 mixtures with chlorine and SO2 at 250–700°C is studied. At 300–500°C, the degree of bismuth chloride sublimation from the oxide mixture increases in the presence of SO2. Chemical sublimation of FeCl3 occurs after BiCl3 is virtually completely recovered from the solid phase. 相似文献
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The results concerning the synthesis, structure and thermal properties of V2O5-MoO3-Ag2O samples in the vanadium rich region of ternary system are presented in the form of quasi-binary phase diagrams in which
at constant V2O5/MoO3 molar ratios, equal 9:1, 7:3 and 1:1, the content of Ag2O was variable. A new ternary phase isostructural with NaVMoO6 has been detected in the investigated system. 相似文献