walk into unscientific

in the basement.

Just as Xu Yun was in a daze.

Old Guo on the side looked at Wang Yuan and Gao Yuanming curiously, paused for a few seconds, and asked:

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

Wang Yuan and Gao Yuanming looked at each other when they heard the words, Wang Yuan thought for a moment and said:
"Guo Gong, from a technical point of view, I personally think that nitrogen cluster compounds are relatively difficult."

"After all, our understanding of small molecular substances is still too shallow. The chemical structure of substances is one thing, and the synthesis is another."

"For example, we have known the concept of carbon-carbon bonds for a long time, but at most we can guide the formation of carbon-carbon bonds through chemical reactions, and we are completely unable to combine point-to-point carbon-carbon bonds at the molecular level."

Hearing Wang Yuan's words.

Xu Yun also subconsciously nodded after regaining his senses.

Students who have lived two hundred years old should know it.

The modern scientific community's understanding of chemical structure can be traced back to 1831, the year Evelyn was born. (Who is this person? He sounds familiar. Ahem.)

At that time, Li Bixi discovered silver fulminate AgONC, and it was proved by analysis that both compounds contained an Ag, N, C, O atom.

The authoritative Archbishop Bericeus defined this phenomenon as "isomerism", in which the component is the molecular formula and the structure is the structure. The molecular formula is the same but the structure is different.

Later, Kekule proposed the methane type according to the gourd painting, which shows that carbon and carbon can also form bonds with each other, and then deduces the structural formula of ethane.

Then in 1861, Butrelov on the other side of the bear formally proposed the concept of chemical structure.

He believed that molecules are not a simple accumulation of atoms, but are arranged in a certain order through complex chemical binding forces. The way in which these atoms are related to each other is the chemical structure of the compound.

Under the guidance of this theory.

He synthesized tert-butyl alcohol, isobutylene, dimethylcarbinol and certain sugar compounds, discovered the polymerization reaction of isobutylene, studied the isomers of butadiene, discovered the phenomenon of cross-isomerism, and also proposed the theory of isotopes. Assumption.

By the present period, there have been solid research results in the theory of chemical structure.

But on the other hand.

Since the accuracy of the instruments is, to put it bluntly, limited by the industrial level, the chemical industry is still floating on the surface in terms of technical applications, but Kongshou Baoshan cannot be mined.

This is like a veteran who has read countless movies, but in reality is a hard-working guy who doesn't even have a girlfriend.

No matter how many postures you have seen in movies, you cannot successfully apply them in reality even if you only have a theory at your fingertips.

But facing Wang Yuan's words, Yu Yongzhong shook his head again, and gave another point of view:
"Wang Gong, what you said...I have a different opinion."

"First of all, as you said, the production of total 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 if it is implemented in the laboratory, there is little hope."

"But what if we take a step back?"

Wang Yuan was suddenly startled and asked inexplicably:
"Back up? What does that mean?"

"Look."

Yu Yongzhong pursed the dry corners of his mouth excitedly when he heard the words, pointed to the structural formula he had written, and explained:

"From the perspective of the type of structural formula, there should be several combinations of nitrogen cluster compounds that may exist."

"Among them, total nitrogen compounds are obviously the most powerful. As the name suggests, this thing only contains N5 groups. I guess there should be two types of Yin and Yang - but this issue is not important at the moment and can be put aside for the time being."

“The key point I want to say is that in addition to all-nitrogen compounds, there are also two categories: diazo compounds and azide compounds.”

"For example, if I remember correctly the azide compound, the aryl pentazole was already produced on the opposite side of the sea in 1956, and we also mastered the related technology not long ago."

"That is, as long as we can get the sodium azide solution, theoretically this compound should be synthesized with probability."

Hear this.

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

Yup
Why didn't you think of it yourself?
Between CL20 and N5 nitrogen anion salts, there are two unstable but stable substances, namely
Diazo compound N2, and azide compound N3.

Like the precursor of N5 is aryl pentazole, the azide compound also has a precursor, which is aryl tetrazole.

The raw material for the synthesis of aryl tetrazole is sodium azide, which can be obtained by reacting sodium nitrite with 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 completion of the reaction, heat slowly to return to room temperature.

Then precipitate crystals, filter with suction, take out the crystals, wash with methanol and ether, and then recrystallize in water to obtain sodium azide:
C2H5ONO+NH2·NH2·H2O+NaOH→NaN3+C2H5OH+3H2O。

As for hydrazine, it was first isolated by Curtis as early as 1887. In 1907, Lahi invented the method of preparing hydrazine hydrate by reacting ammonia and sodium hypochlorite.

Neon began to produce hydrazine hydrate in Otsuka Pharmaceutical Factory in 1939. In the 50s, my country's Yanjing, Magic City and other places also started the production of hydrazine hydrate, so hydrazine hydrate is not a rare thing.

Wait until the sodium azide solution is formed.

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

This step is relatively safe, the drop weight test will not explode, and the properties of the wet product are relatively stable.

Of course.

There is nothing further to say.
all in all.

In terms of craftsmanship, Yu Yongzhong's idea does seem to be feasible to a certain extent?
Mommy.
If the rabbits can really come up with N3, it will be a lot of fun.

This is the mid-[-]th century, after all.
True.

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 works.

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

毕竟完整原子弹的起爆炸药大概是2000多公斤，换算成N5也就是全氮阴离子盐大概200公斤左右，CL20大概600公斤，N3估摸着在400公斤左右。

Even if the consumption of explosives of this magnitude is included in the cold explosion experiment, it 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 considered a particularly high expenditure.

Of course.

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

For one thing, he had to ensure that he didn't go too far when showing off his skills, otherwise it would be easy to expose his perfectly concealed Han Li identity.

Secondly, Xu Yun doubted whether Yu Yongzhong, Wang Yuan and others would pay any attention to their ideas given their current status.

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

Just like when you buy a computer in the future, 5000 yuan is enough for daily use, and 8000 or even tens of thousands of dollars is not necessary, and many people will not be too willing to spend that money.

But if you know that Black Myth Wukong is about to be released in public beta, you might grit your teeth and get a good configuration.

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

all in all.

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

Therefore, Xu Yun had to think of a way, at least to get rid of two big bosses like Lao Guo—such as Fifth Master Qian or Li Jue.

After all, a big boss from the capital can't suddenly appear in front of Xu Yun, and then listen to him tell the story, right?

Impossible, absolutely impossible!

If this kind of thing can happen, Xu Yun will take the handle given to him by the old Guo teacher von Carmen, which is said to be used by Maxwell. Sun Junren gnawed half of it and was snatched by Ye Duzheng. Snatch away the ax currently in Lu Guangda's mouth and send it back to the base after Liu Bosheng chewed it off on the spot!

Well, the kind of nibbling in front of the boss with adult black soldier flies between them!

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

Sure enough, it was exactly what 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 focus of the base's research and development, and N3 can be decided by the capital. up.

I don't know if it's a coincidence.

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

During this period, various projects in the base have been moving forward steadily. Although there are not many stage-level results, they have not encountered any obvious problems.

Xu Yun also had a rare few days of leisure, and even had time to go fishing in Qinghai Lake - the catch was a rain boot, a bamboo hat, a snake and a discarded grenade.

But just like all novels except "Zui Son" will have a finale, no matter how peaceful the day is, there will be a day when it will be broken.

Three weeks later.

September 25th of that year was the 76th day of Xu Yun’s journey.

This moment.

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

As one of the leading branches of the base, the Seventh Branch is mainly responsible for radiochemistry and neutron physics experimental functions.

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

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

However, Xu Yun and others came to the Seventh Factory today not to find the above-mentioned 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 was looking forward to had 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 Xu Yun's biggest transaction since his previous time travels.

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

Not to mention that this accelerator can bring enormous 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, the atomic bomb is often a deterrent weapon, and nuclear war may indeed break out in the future, but at least until 2023, the confrontation in the theoretical field will be more intense.

For example, a news about room-temperature superconductivity exploded with countless monsters and monsters.

And now, Xu Yun is about to uproot those obscene shrines ahead of time in this era.

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

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

Seeing Zhou Cai stepped forward to open the door, Lao Guo took the opportunity to turn his head and introduced to Xu Yun in a low voice:
"Xiao Han, this was originally the warehouse where materials were stored in the Seventh Branch Factory. For example, the special cement used before was stored here."

"The tandem accelerator came a bit suddenly this time. The base vacated the warehouse before it had time to dig the underground laboratory."

Only then did Xu Yun nodded in understanding.

That's it
He wondered when such a building popped up on the base, and co-authored it.
The special cement mentioned by Lao Guo is not the high-strength quick-setting cement known by later generations, but the special material used in the construction of the detonation test site.

The special cement was mixed by Liu Youcheng and his lab, and it was divided into wet material that needs to be applied quickly and dry material that can be stored for a certain period of time.

Needless to say, wet materials will be scrapped if they are not used for a long time, while dry materials are placed in this warehouse and will not be used until it does not rain.

It has been more than a month since Xu Yun proposed the transaction plan, which is obviously not enough time 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 placed the tandem accelerator in this warehouse.

After a few minutes.

Zhou Cai, who had confirmed the situation internally, returned to the crowd and said:
"Leaders, the tandem accelerator has been assembled according to the drawings given by the British, and you can enter the compartment to visit as long as you put on the shoe covers."

Hear this.

Including Zhao Zhongyao, Cheng Kaijia and others, the faces of all the base leaders could not help but show eagerness to try.

This is an 80MeV accelerator.
Then with the cooperation of several experimental department staff.

More than a dozen leaders put on shoe covers one after another and walked into the low building.

Note:
LK99 Chinese Academy of Sciences has published a paper, arXiv.2308.04353, and I will conduct a re-examination all night tonight. I suddenly found that I, a bystander, seem to have become a coolie