Teacher Li Bin carefully studied the wreckage of the "bomb" for a while, and the more he studied, the more surprised he became: "Lan Jie, you are very powerful, using limited materials, you actually played this battery with an explosive effect!"

From the perspective of explosives, the content of sulfuric acid is not directly related to whether it explodes or not.

Lan Jie pondered, what went wrong?

With this question in mind, Lan Jie remade a chemical battery, and then smoothly lit up his light bulb.

Creative Thinking +1.

'Plus one!'

'There's something to my creativity!'

With the joy of plus one, Lan Jie came to the Yueshan District Test Center for the third time on the morning of September 20.

Without further ado, hurry up and ding-ding-ding!

The preliminary test paper of the chemistry competition was issued, with a total of 11 questions and 100 points.

Lan Jie quickly brushed the paper from beginning to end, and there was no Fan's gas at the root of this test paper, and none of the questions related to materialization appeared!

Teacher Lan is too fierce, what question type he bets, this type of question or the type of question that is related to this type of question, all disappear!

Question 1, 7 marks.

Slaughter the first question first, find the feel!

The first says that in 399 BC Socrates was poisoned after drinking a mixture containing coniine. Coniine is a toxic alkaloid that can cause death by paralyzing the respiratory system in a lethal dose of less than 0.1 g. In 1881, Hofmann determined that the chemical formula of coniine was C8H17N, and the product of the Hofmann elimination reaction followed by the complete methylation of coniine was 4S-(N,N-dimethyl)-oct-7-en-4-amine.

(1) Draw the structure of 4S-(N,N-dimethyl)-oct-7-en-4-amine and its enantiomers;

(2) From the results of the Hofmann elimination reaction, what structural characteristics can be determined of the coniine, and from this result, you can draw all the possible structural shortenings of the coniine.

The first question is a big card, and Socrates is brought straight up. ’

Lanjie remembered that Socrates had died of poisoned wine, which contained poison hemstein, which was found in the form of salt in plants such as poison hemlock, which was highly poisonous.

Coniine is physaxine, and Lanjie remembered that physheline is the first alkaloid synthesized artificially, synthesized by its racemic mixture, which can be separated into optically pure compounds by recrystallization of D-tartaric acid.

Based on the nomenclature of organic compounds and the knowledge of optical rotation, Lanjie made a judgment that there are 8 carbons on the backbone of 4S-(N,N-dimethyl)-oct-7-en-4-amine, of which C7 and C8 are double bonds, and C4 is substituted with dimethylamino, and the chirality of its C4 carbon is judged according to the Cahn-Ingold-Prelog rule.

=_-_-▃N-_-

=_-_-〓N-_-

The structure of physhelmine looks very funny, but its chemical properties can poison behemoths, and it is a real killer of emotions.

Ranger gave physelvine a first respect, and then asked a second question.

The second question is also about metheline, and the teacher asked the candidates to write down all the structural shorts that may exist in methaline.

'Hoffman elimination reaction is a reaction in which quaternary ammonium salt is eliminated under alkaline conditions, and the chemical formula of 4S-(N,N-dimethyl)-oct-7-en-4-amine is C8H17N, and the chemical formula of physhemine can be seen that physhemine undergoes two methylations to obtain quaternary ammonium salt, and the double bond and amino group in the product obtained after the Hoffmann elimination reaction are located in the same molecule, so phyxeline is a cyclic secondary amine. ’

According to the Hofmann elimination reaction, there are two possible linking sites for the nitrogen atom, so the structure of poison hemistrine has two types: five-membered ring and six-membered ring. In summary, there are 3 possible structures of physcheline. ’

'That's a wonderful question!'

The teacher gave the name reaction, the synthesis strategy, and then after my deduction, I finally knew how to synthesize poison hemeryne. ’

While Lan Jie got the answer, he also deeply realized the awesomeness of the early organic chemists.

Hoffman's time was in the 180s, when there were no high-end chemical instruments today, and it was extremely difficult for Hoffmann and other early organic chemists to accurately determine the structure of organic matter.

The high difficulty of the operation reflects the genius and wisdom of the early organic chemists, which is also the charm of organic chemistry.

Although chemistry is a tool, Ranger felt the need to give a hand of respect to talented chemists.

On the whole, this paper of the preliminary round of the chemical competition highlights a stable word.

There are no hellish questions, and there are no questions that give you the answers at a glance. The examination papers require candidates to play rigorous and meticulous thinking to the highest level, and Lan Jie, who has always been rigorous and meticulous, is as stable as ever, he does the questions smoothly and steadily, and submits the papers safely and steadily.

Tomorrow morning is the preliminary round of the biology competition, and after the competition, Lan Jie will go home to review biology.

Today is Saturday, and Lan Jinhui and He Yuyi are at home.

Lan Jinhui seemed to care more about the chemistry competition than Lan Jie, and as soon as Lan Jie entered the door, Lan Jinhui eagerly asked, "Ajie, how did you do in the exam?

Lan Jie replied: "When I was playing football, I met an elder brother from the Yangda Chemical Institute, and the elder brother said that among the four major chemistry of the Institute of Chemistry, organic, inorganic, analytical, and physicochemical, the most troublesome and difficult thing to do is physicochemistry. Dad, you just got rid of the materialization problem, there is no doubt that Dad, you are fresh milk!"

Lan Jinhui was extremely puzzled: "I bet on a certain type of question, but this type of question does not appear on the test paper, this phenomenon is called fresh milk?"

Lan Jiele was broken: "Hahaha, yes, yes!"

Lan Jinhui asked again: "Is there such a possibility, I bet all the question types on the eve of the exam, will I send a blank piece of paper during the exam?"

Lan Jiele rolled all over the ground: "Ahh

Lan Jinhui was puzzled again: "Dharma King?"

"Yes, yes, Nankai Song Fawang, who specializes in guiding the national team of physical competition, Dad, you should know him, right?" Speaking of this Song Fawang, Lan Jie looked adoring.

His son admired other people's physics professors, which made Lan Jinhui curious: "Yes, I know Professor Song from Nankai Institute of Physics, and I have a different professional direction from him, and we don't know each other very well, and we have only met once or twice." Professor Song is Ajie, the King of Song in your mind? What about me, what is my status in your mind?"

"Southern Lan and Northern Song Dynasty, Dad, you are the king of Lanfa!"

"How many Dharma Kings are there in the physics world?"

"South, east, west, four Dharma kings!"

"So who is the sect leader?"

"The sect leader is also a mage, he is the most powerful mage, he is the Thunder and Lightning King!"

"It's outrageous. Lan Jinhui smiled dumbly, and then he said with a straight face: "Ajie, how did you do in the preliminary round of this competition? I see that you are very relaxed, so you feel good about yourself?"