How do you study chemistry in college, especially organic chemistry?

Organic chemistry in college is actually very simple, and it is easy to learn it well, but the premise is that you must first understand each reaction process and reaction mechanism, and you must find some books that are comparative, such as Wang Xiaolan's organic chemistry. Memorize each basis, and you'll pick it up very easily. Firmly grasp the structural characteristics of organic molecules, relevant knowledge should be explained in detail in the chapter of chemical bonds in general chemistry, only to grasp the structure is more conducive to the grasp of the reaction mechanism, the understanding and grasp of the reaction mechanism has become the top priority of learning organic chemistry in college, because the complexity of the reaction mechanism and its diversity make organic chemical reactions produce completely different results under different conditions.

First of all, the most basic reaction equation should be remembered, and the reaction mechanism should be clarified, for example, aniline and nitrobenzene, because the amino group is the electron group, resulting in a larger electron cloud density in the benzene ring, which will activate the hydrogen on the ortho and para-carbon of the benzene ring carbon connected to the amino group, then aniline is prone to ortho-para substitution reaction, and the nitro group is an electron-withdrawing group, which relatively reflects the activation of hydrogen on the meta-carbon connected to the carbon, so it is easy to undergo meta-substitution. Naturally, as long as you know whether the group attached to the benzene ring is an electron-withdrawing or an electron-donor group, then you will understand what kind of substitution reaction is taking place.

Also, the name reaction is very important, and the response that the teacher emphasizes many times during the class is also very important, and then it is important to remember a few special reactions. <>

First of all, have faith and don't be afraid! In fact, organic is very easy to learn, and it is much simpler than physicochemical and structural chemistry.

I have taken the organic entrance examination, and I can summarize it in two points: practice more questions and take more notes.

1.Beginners in organic learning are to study in the order of the functional group (basically the arrangement in the textbook) one by one, and complete the after-class exercises, and be able to remember the reaction and mechanism of a person when he sees it.

2.Intermediate: Thematic training, organic problems are nothing more than naming, writing reaction formulas, separating and identifying, comparing various acidity, alkalinity and reactivity (sn1sn2e1e2), mechanism problems, inference, synthesis.

The above topics can be solved in two days each (except for synthesis, because it is the most comprehensive), the key is to practice more questions, I recommend "Organic Chemistry Postgraduate Examination Guidelines", remember to summarize and take notes, after doing more topics, I found that those are nothing more than these things, I am tired of doing the questions in the end, and there are almost no questions that have not been done. Finally, the premise of doing synthesis is that you fully understand the reaction mechanism.

3.Advanced: It is recommended that you use books such as naming, how to name in English, how to name ultra-complex three-dimensional structures, etc., I hope you have the ability to experience the advanced realm by yourself.

Good luck learning organic.

Organic chemistry mainly focuses on the content of the above five parts. Among them, "Understanding Organic Compounds" is a tool for learning organic chemistry, the middle three parts are the basics, and the last part, "Entering the Era of Synthetic Organic Polymer Compounds", is an expansion. 1.

Writing and nomenclature of isomers.

The reasons why students find it difficult: incomplete writing, heavy writing, the difficult points have been understood, and the next step is to learn in combination with efficient learning methods. For the organic chemistry part, how can we learn efficiently? Start with hydrocarbons, first remember the properties of each functional group, and the chemical reaction will be fine.

Then figure out how to identify each substance, but don't get confused. Figure out a few types of reactions. In fact, all kinds of reactions are the reactions of various functional groups, so the nature of functional groups must be well understood.

Understand memory, pay attention to the structure and properties of matter, and grasp the reaction mechanism. Don't be lazy, you can also memorize it for early reading. Widely recommended by cognitive psychologists:

Learned, close the book, and say "Thinking Training Method." Just because you understand it doesn't mean you will do it. If you can do it, it doesn't mean that you have mastered everything, it may just be based on feeling.

Being able to say it in your own words is the simplest and most effective thinking training; It is the application of what has been learned, and it is a positive re-creation! Say it, and you really have it! Practice more, think more, ask the teacher more!!

If you don't understand, you have to ask questions, and by asking questions, you can increase the interactivity and have a deeper grasp of the knowledge points. Simple, classroom, interactive learning will make your learning easier.

monovalent potassium hydrochloride sodium silver; Divalent oxygen, calcium, barium, magnesium, zinc, trialuminum, tetrasilicon, pentanitrogen phosphorus; 23 iron, 24 carbon, 24 6 sulfur are all Qi; Copper-mercury bivalent is the most common.

Valence formula.

The main valency of common elements.

chlorochlorobromoiodine negative monovalent; N-monohydrogen silver with potassium sodium.

The minus two of oxygen should be remembered first; n-dimagnesium, calcium, barium and zinc.

positive three is aluminum, positive four silicon; Let's put the price change down.

All metals are regular; One or two coppers come two or three irons.

Manganese is 24 and 67;The two or four of carbon should be kept in mind.

Non-metallic negative main is uneven;Chlorine is negative one positive one five seven.

Nitrogen and phosphorus minus three and plus five;Different phosphorus, three nitrogen, two or four.

Sulfur has negative two positive four six;It will be cooked when you use it while memorizing it.

Common root price formulas:

Monovalent ammonium nitrate;Hydrohalide hydroxide.

Permanganate, chlorate;Perchlorate acetate.

Divalent sulfate carbonate;Manganese hydrosulfate.

Suspense ammonium root is normal;Negative three has a phosphate group.

Metal Activity Order Table:

High school) potassium, calcium, sodium, magnesium, aluminum, manganese, zinc, chromium, iron, nickel, tin, lead, hydrogen;Copper, mercury, silver, platinum.

In a word, memory plus understanding, nothing else.