How to solve the problem of "art" in chemistry

When it comes to what chemistry is, you will get the same answer from junior high school to university.

chemistry is not a science that studies the nature, composition, structure and changing laws of matter at the molecular and atomic levels. Seeing this sentence is really abstract. Anyway, chemistry is the study of the micro-world, which is invisible and intangible. Usually, the teacher said that when there is electronic equipment, there is a dynamic three-dimensional diagram. Sometimes, just look at the plan on the blackboard and the static three-dimensional diagram on the book, and there is only a positive one. In short, in a word: imagine by yourself.

how can art problems come to chemistry? Let's assume for a moment that a teacher is not good at drawing, and he seldom draws in the process of chemistry teaching. When he needs to draw, he begins to use the most commonly used technique in Chinese: metaphor, indeed, close to life. Who will say that you can only read things in books one day, but students rarely really know what it is, only what it looks like, and even some people even have some ordinary instruments after they arrive at university?

Let's assume the second: a teacher draws beautifully, but there is a disadvantage, that is, drawing is a little slow. Every student understands a few knowledge points in a class, but it is unfair to the students who study well. Moreover, if the progress can't keep up, a lot of knowledge will not be really understood by the students, so there is no need to repeat other problems.

Therefore, in the teaching process, teachers are not only required to draw beautiful images, but also to be quick and efficient. However, it is impossible to master them in a short time, even if they master them, they rarely fail to draw those complicated structures.

In the face of difficulties, there are always some' whimsical' people who want to solve this problem, but they have really solved this problem. Since then, teachers no longer have to worry about drawing, efficiency, students' understanding or not. Although these tools are not perfect, they are enough for chemistry teaching now.

I will introduce four chemical tools today:

1. Diamond3.

2. ChemDraw

3. ChemWindow

4. ACD/ChemSketch

1. Diamond software: it is a chemical professional application software developed by Crystal Impact GbR Company of Bonn University, Germany, which is mainly used to draw and explore crystal structure.

1. main functions of diamnd in chemical education

(1) accurately constructing crystal structure.

(2) display the crystal vividly, which is convenient for observing the crystal structure from all directions. Can be carried out on the product.

(3) labeling and beautification.

(4) The bond length, bond angle and torque of the product can be measured.

(5) By learning this software, you can learn more about the crystal structure. You can put the product body.

(6) the movement process of the structure is animated and saved as an AVI file.

ii. introduction of special functions

(1) making the crystal structure into animation

(2) setting materials and corresponding color backgrounds for the crystal structure.

(3) Watch the molecular structure in Diamond software.

2. Basic steps for Diamond to build a crystal model:

1. Determine which crystal model to build

2. Collect data (find the cell parameters of the crystal and the coordinate parameters of atoms in the crystal)

3. Model in Diamond software (enter relevant data in each dialog box)

4. Modify and beautify the crystal model in the operation scene of Diamond software. Marking and observing

5. On-site teaching or exporting the three-dimensional file of crystal model (picture or web page format)

3. Introduction of special functions

(1) Animation of crystal structure

(2) Setting materials and corresponding color background for crystal structure.

(3) Watch the molecular structure in Diamond software.

second, as one of the core tools of ChemDraw, ChemDraw was developed by CambridgeSoft Company in the United States, which provides a complete and easy-to-use drawing solution for scientists, including drawing chemical structures and reactions, and can obtain corresponding attribute data, system naming and spectral data, making it the first choice for many scientists.

1. Explain ChemDraw and its application in detail

Introduction to the main interface of ChemDraw ChenDraw is a component in Chemoffce, which can create and edit all the graphics related to chemistry; Can establish and edit all kinds of chemical equations, structural formulas, three-dimensional graphics, symmetrical graphics, tracks, etc., and can flip, rotate, scale, store, copy, paste and other operations on graphics.

2. Application steps

1. Know the main gadgets

(1) Menu bar: contains command settings for operating ChemDraw application files and contents. Including "file (f)", "edit (e)" and "view (v)". "object (o)". Menus such as Structure (S), Text (X), Curve (C), Color (L), Window r(W) and Help (H).

(2) the "file (f)" menu contains common functions such as opening, creating, saving, saving as printing, page setting, parameter setting and exiting.

(3) the "edit (e)" menu covers common functions such as copying, pasting, cutting, selecting all, inserting a chart and inserting an object.

(4) the main function of the "view (v)" menu is to call the corresponding toolbar panels (such as main T tool bar, common J tool bar, object toolbar, information window, etc.) when users use it.

(5) The "Object (O)" menu mainly includes the settings, arrangement angle, scale, rotation and other functions of commonly used objects.

(6) The menu "Structure (S)" contains the functions of setting the properties of atoms, setting the bonding properties, checking and clearing the structure, and converting the name.

(7) The "Text (X)" menu contains the functions of setting the font, font and font size alignment of the text.

(8) The menu "Curve (c)" covers some operations of the user in the process of drawing the structural formula (such as general setting, dotted line: bold, double line, closed filling, gradient setting, etc.).

(9) "Color (L)" is mainly used for color setting when drawing structures.

(1) the "window (w)" menu covers the presentation forms of windows (such as tiling, cascading, etc.).

(11) Help (h) The "Help" sheet contains information about the use of the software and the update information.

2. Use as required

3. Special function (ultra version is special)

1. It can predict the common physical and chemical properties of molecules, such as melting point and heat of formation.

2. Name the structure according to IUPAC principle.

3. predict the chemical potential shift of protons and carbon 13, etc.

since most of them have similar functions, the special functions of the remaining two chemical tools are introduced next.

thirdly, chemical ChemWindow(CW) was first published by soft shell intern.ltd. in 1989. The main function of this software is to draw chemical molecular structural formulas and chemical graphs of various structures and shapes, and it has the editing function of chemical molecular graphs that other drawing software does not have.

special functions: (1) drawing chemical structure, chemical reaction formula and chemical experimental device

(2) spectral curve processing: you can directly import chromatograms, spectrograms, NMR diagrams, mass spectrograms and other curves for processing and labeling, and output their spectrograms in the format of users' wishes and requirements or transfer them to other application software such as Microsoft Word and PowerPoint, which is convenient for publishing or reporting

(3).

fourthly, ACDFREE V11. is a free software in the ACD/Labs series developed by ACD. It includes four modules: ACD/ChemSketch, ACD/3D Viewer, ACD/CHNMR Viewer and ACD/ChemBasic. ACDFREE V11. is a free software in the ACD/Labs series developed by ACD.

Special functions: 1. Used to draw chemical structures and calculate their properties.

2. Drawing mode: used for text and image processing. Molecular property mode, which estimates the following properties.

3.* molecular weight * percentage composition * molar refractive index, * molar volume * isotonic specific volume * refractive index * surface tension * density * dielectric constant * polarity * single isotope mass, nominal molecular weight and average molecular mass.

4. support WinXp,Win2,Win23 win23.

Knowing these chemistry software, you don't have to worry about' art' in chemistry, improve teaching efficiency and give students a more intuitive understanding of chemistry.