Chapter 622 The Long-Awaited Arrival!

In the basement.

Just as Xu Yun was in a trance.

Lao Guo on the side looked at Wang Yuan and Gao Yuanming with some curiosity, paused for a few seconds, and asked:

"Lao Wang, Lao Gao, what do you think of Comrade Yongzhong's idea?"

Wang Yuan and Gao Yuanming looked at each other after hearing this, and Wang Yuan pondered for a moment and said:

"Engineer Guo, from a technical point of view, I personally think that nitrogen cluster compounds are still quite difficult."

"After all, our understanding of small molecules is still too superficial. The chemical structure of a substance is one thing, and synthesis is another."

"For example, we knew the concept of carbon-carbon bonds a long time ago, but at most we can guide the formation of carbon-carbon bonds through chemical reactions, and we can't combine carbon-carbon bonds point to point at the molecular level."

Hearing Wang Yuan's words.

Xu Yun, who came back to his senses, also nodded subconsciously.

Classmates who have lived for two hundred years should all know.

The earliest cognition of chemical structure in the modern scientific community can be traced back to 1831, the year Evelyn was born. (Who is this guy? Sounds familiar. Ahem.)

At that time, Liebithi discovered silver fulminate AgONC, and proved through analysis that both compounds contain one atom of Ag, N, C, and O.

The authoritative Archbishop Belizeus defined this phenomenon as "isomerism", where "isomerism" refers to the molecular formula and "isomerism" refers to the structure. The molecular formula is the same but the structure is different.

Later, Kekulé proposed the methane type, which shows that carbon can also form bonds with itself, and then the structural formula of ethane is derived.

Then in 1861, Butlelov from the Russian side formally proposed the concept of chemical structure.

He believed that molecules are not simple accumulations of atoms, but are arranged in a certain order through complex chemical bonding forces. This kind of atomic relationship and bonding mode is the chemical structure of the compound.

Under the guidance of this theory,

He synthesized tert-butyl alcohol, isobutylene, dimethyl carbinol and some sugar compounds, discovered the polymerization reaction of isobutylene, studied the isomers of butadiene, discovered the phenomenon of cross-isomerism, and proposed the hypothesis of isotopes.

By this time, chemical structure has achieved very solid research results in theory.

But on the other hand.

Due to the limitation of instrument accuracy, which is simply the industrial level, the chemical industry is still superficial in the application of technology, guarding the treasure mountain but unable to mine.

This is like an old driver who has watched countless movies, but in reality he is a miserable guy who doesn't even have a girlfriend.

No matter how many sex positions you see in the movies, you can't use them successfully in reality even if you have a lot of theories in your hands.

However, facing Wang Yuan's words, Yu Yongzhong shook his head again and gave another point of view:

"Mr. Wang, I have a different opinion on your words."

"First of all, as you said, the production of all-nitrogen compounds is indeed very difficult. I also admit that it is difficult for us to achieve its production in terms of technology - let alone mass production, even the hope of landing in the laboratory is slim."

"But, what if we take a step back?"

Wang Yuan was stunned for a moment and asked in confusion:

"Take a step back? What does this mean?"

"Look."

Yu Yongzhong pursed his dry lips excitedly, pointed to the structural formula he wrote, and explained:

"From the type of structural formula, the type of possible existence There should be several combinations of nitrogen cluster compounds. "

"Among them, all-nitrogen compounds are obviously the most powerful. This thing is just as the name implies, it only contains N5 groups. I guess there should be two types of yin and yang - but this issue is not important for the time being, so we can put it aside for discussion."

"The point I want to make is that in addition to all-nitrogen compounds, there are also two categories of diazo compounds and azide compounds."

"For example, if I remember correctly, azide compounds were already produced by the other side of the sea in 1956. We also mastered the relevant technology not long ago."

"That is to say, as long as we can get the sodium azide solution, theoretically this compound should have a probability of being synthesized."

Hearing this.

A flash of lightning suddenly flashed through Xu Yun's mind.

Yes,

Why didn't I think of it?

Between CL20 and N5 all-nitrogen anion salt, there are two unstable but stable substances, namely

diazo compound N2 and azide compound N3.

Just like the precursor of N5 is aryl pentazole, azide compounds also have a precursor, which is aryl tetrazole.

The raw material for the synthesis of aryl tetrazole is sodium azide, which can be prepared by the reaction of sodium nitrite and hydrazine hydrate:

Dissolve hydrazine hydrate in anhydrous ether, add a mixed solution of sodium hydroxide and ethyl nitrite under water cooling, and react under ice cooling.

After the reaction is completed, slowly heat it to restore it to room temperature.

Then precipitate crystals, filter, take out the crystals, wash them with methanol and ether, and then recrystallize them in water to obtain sodium azide:

C2H5ONO+NH2·NH2·H2O+NaOH→NaN3+C2H5OH+3H2O.

As for hydrazine, it was first separated by Coetius as early as 1887, and in 1907, Rasch invented a method for preparing hydrazine hydrate by reacting ammonia and sodium hypochlorite.

Neon began to produce hydrazine hydrate at Otsuka Pharmaceutical Factory in 1939. In the 1950s, Yanjing, Shanghai and other places in my country also began to produce hydrazine hydrate, so hydrazine hydrate is not a rare thing.

Wait until the sodium azide solution is generated.

As long as the quaternary ammonium resin is washed with DMF, ethanol and deionized water and added to it, and then rinsed with methanol and ether several times, the polyazide compound can be extracted by vacuum filtration.

This step is relatively safe. The drop hammer test will not explode, and the wet product is relatively stable.

Of course.

I can't say what's next.

In short.

From a technological point of view, Yu Yongzhong's idea seems to have a certain feasibility?

Oh my god.

If the rabbits can really make N3, it will be a lot of fun.

After all, this is the middle of the twentieth century.

Indeed.

Yu Yongzhong's idea is only feasible. Xu Yun is not sure whether it can be implemented and how long it will take to implement it.

But if everything goes well.

Even if it is only successfully produced in the laboratory, N3 can still be used in the rabbits' nuclear weapon test.

After all, the detonation charge of a complete atomic bomb is about 2,000 kilograms, which is converted into N5, which is about 200 kilograms of all-nitrogen anion salt, about 600 kilograms of CL20, and N3 is estimated to be about 400 kilograms.

This amount of explosives, even if the consumption of cold explosion experiments is taken into account, will not exceed 1.5 tons.

The research and development cost of 1.5 tons of N3 is an unaffordable figure for any individual in this era, but in front of the huge machine of the country, it is not a particularly high expenditure.

Of course.

If the rabbits are really determined to develop N3, Xu Yun will definitely have to think of some ways to add some technology, which is actually a difficult point.

First, he must ensure that when he presents the technology, he will not go too far beyond the scope, otherwise it will easily expose his extremely perfect identity of Han Li.

Second, Xu Yun doubts whether the organization will pay attention to the ideas of Yu Yongzhong, Wang Yuan and others given their current status.

This is not to say that the organization is short-term, but at present, CL20 is enough for the rabbits to use for many years.

Just like when you buy a computer in the future, 5,000 yuan is enough for daily use, and 8,000 or even tens of thousands of yuan are not necessary, and many people will not be willing to spend that money.

But if you know that Black Myth Wukong is about to be publicly tested, you might grit your teeth and buy a good configuration.

Well, it's just a metaphor, please don't substitute it into reality.

In short.

Because of this reason, even if Lao Guo is present at the moment, this "weight" is not enough.

Therefore, Xu Yun must think of a way to at least pull two more big guys like Lao Guo down-for example, Qian Wushi or Li Jue and others.

After all, it's impossible for a big guy from the capital to suddenly appear in front of Xu Yun and listen to him tell the story again, right?

Impossible, absolutely impossible!

If this could happen, Xu Yun would chew on the axe that was given to him by teacher Lao Guo by von Karman, which was said to have been used by Maxwell, which Sun Junren chewed halfway and was snatched away by Ye Duzheng, which Ye Duzheng had not chewed twice and was snatched away by Qian Wushi, which Liu Bosheng chewed and sent back to the base, and which is currently in Lu Guangda's mouth!

Well, chewing with black soldier flies in front of the boss!

Then Xu Yun talked with Yu Yongzhong and others about CL20, and then left the basement with Lao Guo.

It was exactly as Xu Yun thought.

Lao Guo only said that he would relay the relevant information to Li Jue, and did not take Xu Yun to the factory office to report in person - in Lao Guo's view, CL20 is the research and development focus of the base, and N3 can be decided by the capital.

I don't know if it is a coincidence.

After finishing the conversation with Yu Yongzhong and others, the base had a relatively rare period of calm.

During this period, all projects of the base were moving forward steadily. Although there were not many achievements at the stage level, there were no obvious problems.

Xu Yun also had a rare few days of leisure, and he had time to go fishing in Qinghai Lake - the fish he caught were a rain boot, a bamboo hat, a snake and an abandoned grenade.

But just like all novels except "The Son-in-law" have a grand ending, even the most peaceful days will be broken one day.

Three weeks later.

On September 25 of that year, it was the 76th day of Xu Yun's time travel.

Today.

Xu Yun, Lao Guo, Wang Ganchang, Cheng Kaijia, Dayu, Zhao Zhongyao and others all gathered at the seventh branch of the base.

As one of the branches at the forefront of the base, the seventh branch mainly undertakes the functions of radiochemistry and neutron physics experiments.

For example, Liu Youcheng's chemical laboratory and the radioactive nuclear component research and development coordination team led by Wang Ganchang are here.

In addition, the drug development team led by Lou Zhicen and Tu Luming is also located in the factory area, each occupying a small building.

However, Xu Yun and others came to the seventh factory area today not to find the above project teams to inspect the project, but because they received a notice from Li Jue's assistant Zhou Cai not long ago

The tandem proton accelerator that Xu Yun has been looking forward to has arrived at the base early this morning!

This is also the link that Xu Yun is most concerned about in the entire multi-party transaction.

At the same time.

This accelerator is also the largest transaction since Xu Yun traveled through time.

It can be said that throughout modern history, there are not many transactions that can reach this level.

Not to mention that this accelerator can bring extremely huge benefits to the rabbits. Even in Xu Yun's view, its importance is of the same order of magnitude as the atomic bomb.

After all, atomic bombs are often deterrent weapons. Perhaps nuclear wars will indeed break out in the future, but at least until 2023, the confrontation in the theoretical field will be more intense.

For example, a piece of news about room temperature superconductivity has blown up countless monsters and demons.

And now, Xu Yun is going to uproot those monsters and demons in advance in this era.

Then, under the leadership of Zhou Cai, Xu Yun, Lao Guo and his party quickly came to the outside of a building.

This building covers an area of ​​about a thousand square meters, which is obviously larger than other buildings, but the height is only one floor.

Seeing Zhou Cai step forward and open the door, Lao Guo took the opportunity to turn his head and whispered to Xu Yun:

"Xiao Han, this was originally the warehouse for the seventh branch to store materials, such as the special cement used before. "

"The tandem accelerator came a little suddenly this time, and the base didn't have time to dig the underground laboratory, so they vacated this warehouse first."

Xu Yun nodded in understanding.

I see

He was wondering when such a building appeared in the base, and it turned out to be like this.

The special cement that Lao Guo mentioned is not the high-strength quick-setting cement that everyone knows in later generations, but the special material used in the construction of the explosion test site before.

That special cement was mixed by Liu Youcheng's laboratory and was divided into wet materials that needed to be applied quickly and dry materials that could be stored for a certain period of time.

Needless to say, the wet materials would be scrapped if they were not used for a period of time, and the dry materials were placed in this warehouse and would not be taken out until it stopped raining.

It has been more than a month since Xu Yun proposed the deal, and this time is obviously not enough for the base to build another underground laboratory.

In addition, the U2 reconnaissance aircraft can no longer fly to the mainland, so the base temporarily put the tandem accelerator in this warehouse.

A few minutes later.

Zhou Cai, who had confirmed the situation with the inside, returned to the crowd and said:

"Leaders, the tandem accelerator has been assembled according to the drawings given by the British. You can enter the compartment for a visit as long as you put on shoe covers."

Hearing this.

Including Zhao Zhongyao and Cheng Kaijia, the faces of the leaders of the base could not help but show an eager look.

This is an 80MeV accelerator.

Then, with the cooperation of several experimental department staff.

More than a dozen leaders put on shoe covers and walked into this low building.

Note:

LK99 Chinese Academy of Sciences has published a paper, arXiv.2308.04353, and we have to do a re-test tonight. I suddenly found that I, a bystander, seemed to have become a coolie.