What is structurally similar, and what does it mean that homologues are structurally similar

In chemistry, we refer to compounds that are structurally similar but differ in composition by one or more atomic clusters as homologues.

Methane, ethane, butane, etc. in alkanes, they differ by n CH2 and are homologues of each other.

Cited from "Shanghai Senior High School Phase II Textbook - Chemistry (Extended Curriculum, Experimental Textbook, First Edition, August 2008)".

For example, methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), etc. are homologues, which can be expressed by the general formula CNH2N+2. Among them, methane and n-butane are homologues of each other, and methane and isobutane are also homologues of each other.

Methanol CH3OH, ethanol CH3-CH2OH, propanol CH3-CH2-CH2OH and so on are also homologues, which can be expressed by the general formula CN+H2N+1OH or ROH.

Ethylene, propylene, butene, etc. are homologues of each other, and the general formula CNH2N can be used

But organic compounds with the same chemical formula are not necessarily homologues.

For example, ethanol and ether have the general formula of CNH2N+2O, but their functional groups are different and they are not homologues.

For example, ethylene and cyclobutane have the general formula of CNH2N, but they are not homologues.

The chemical properties of a class of homologues are basically similar, and the physical properties change regularly with the increase of carbon atoms.

The physical properties of the congeners are different but they have the same functional groups, so the chemical properties are similar.

Alkane. Alkene. Alkynes have similar physical properties.

Judgment law of homologues: one difference: the molecular composition is different by several CH2, that is, the relative molecular mass difference is 14q, and q is two.

the difference in the number of carbon atoms in the molecule; Two same: the same type, the same structure.

Compounds that differ in composition by one or more clusters of certain atoms are collectively called homologues.

The homologues are structurally similar, which means that they have the same functional group and the functional group is the same. Homologues refer to organic compounds with similar structures and several "CH2" atomic clusters with different molecular compositions; It is generally found in organic chemistry and must be of the same class of substances.

Characteristics of homologues:

1. The homologues must conform to the same general formula, but the homologues that conform to the same general formula are not necessarily homologues.

2. The congeners must be of the same class.

3. The chemical formula of the homologues must be different.

4. The constituent elements of the homologues are the same.

5. The structure of the congeners is similar, not necessarily identical.

6. There are several methylene atomic clusters between the homologues.

The structure of the similarity is: (left and right knots staring at the pure structure) like (left and right structure).

The similar structure is: (left and right structure) like (left and right structure). Pinyin is: shèngsì. The phonetic pronunciation is:

What is the specific explanation, we will introduce it to you through the following aspects:

1. Explanation of the words [filial piety is accompanied by this to view the details of the plan] is better than shèngsì. (1) Win than; Exceed.

2. Chinese dictionary.

Better, more superior. Words translated from English to Surpass, Betterthan, Superiorto German, überlegensein, French êtremeilleurque, Surpasser, Dépasser, L'emportersur

3. Network Explanation.

Victory is like victory, which means that it is better than being stupid, exceeding.

About similar idioms.

The heart is like an arrow, three points are like a person, seven points are like ghosts, the sun is like a fire, and the spring is like a woodcock, the spring is like the sea, like glue, like paint, like a smile, not a smile, like an infatuation, like a drunk, like a flower.

About similar words.

Like a flower, like the moon, like an idiot, like a drunk, like a wooden chicken, spring, like a sea, like glue, like paint, like an arrow, like a flower, like a brocade, between suspicions.

The structure of "like" is a left-right structure, "like", a standard first-level character (commonly used word) in modern Chinese, and the pronunciation of Pu Zhi Yin is sì and shì, which was first seen in the Jin Wen era and belongs to the shape and sound characters in the six books.

1. Similar structure.

Similar Chinese character structure: left and right structure, total strokes: 6, radical: 亻, stroke order: apostrophe, vertical fold 捺撇捺.

2. The meaning of similarity.

相, like: 相 (xiāng ) like. Similar. Specious.

Like, means uncertain: it seems. It seems so.

It means to compare, and it has the meaning of exceeding: one is higher than the other.

3. The etymological evolution of similarity.

"Like", originally seen in the Jinwen era of Heng Tie Hall, from 亻, means that people are similar to each other, similar; From to, to have righteousness, it means that it is considered to be similar. Later, it gradually appeared in the sayings, and finally evolved into a simplified version of the regular script "like".

Similar pronunciation. 似" is a polyphonic character with two pronunciations, sì and shì. When "like" is pronounced as sì, it often refers to like or seems, and is also used for comparison, indicating exceeding. When "似" is pronounced shì, it is only used for "似的".

似 (shì) is a particle used after a noun, pronoun, or verb to indicate resemblance to something or situation. <>

The structure of appearance is: appearance (left and right structure) resemblance (left and right structure).

The structure of appearance is: appearance (left and right structure) resemblance (left and right structure). The part of speech is: verb. The phonetic pronunciation is: Pinyin is: màosì.

What is the specific explanation of the seeming one, we will introduce it to you through the following aspects:

1. Explanation of terms [click here to view the details of the plan].

Looks like màosì. (1) It looks very similar on the surface; Appearance.

2. Citations and Explanations.

superficially like. For example, it may seem strong, but it is actually weak.

3. Chinese dictionary.

The appearance is very similar. For example, some people who seem to be weak and can't help the wind, but their bodies are very tough!

Words translated into English: toappeartobe, toseemasif, German, anscheinend, French, enapparence, ressemblerà

Fourth, the network explained.

Basic explanation of appearance: 貌似 (màosì); Many people are as the name suggests: appearance:

Appearance, appearance: like, that is, the appearance is like, the appearance is like. After the Internet became popular, due to the accidental use of a certain hipster, it was spread and became a substitute for "as if".

Literary theory is a mistake in this confusion. It's just that there are more people who use it, and it is used by default on the Internet. But actually looks like it means to look like, but not to actually look like.

About synonyms of seeming.

It's like a god.

About the poems that seem to be.

Huanxi Sha, imitation drinking water words only seek to look but have no title", "Zeng Xuangan said that Yu looks like Chengzhai Yang Gong made this report", "I look for everything that looks like a bird and talks about it".

Verses about seeming.

The old man looks like Yuanjun, he looks like an old man, his heart is still happy, his mother is shocked, and he looks like Naiweng.

About the seemingly single auspicious poem.

launder

About the idiom of seeming.

It seems to be powerful, like an infatuation, like a drunk, three points like a human, seven points like a ghost, like a fire, like a smile, like a wooden chicken, like a saltless spring, like a returnee, like an arrow.

About the words that seem to be.

The heart is like an arrow, the mouth is like a hanging river, the spring is deep like the sea, it is like being drunk, it seems to be powerful, and it seems that the days are long and old, and it seems to be a wooden chicken, and it seems to be saltless.

About plausible sentence formation.

1. The invaders seem to be strong, but under the resistance of the local military and civilians, they soon exposed the essence of being strong from the outside and capable from the middle.

2. The few cars seem to have no place in the crowd, surrounded by the crowd, but it is very difficult to move forward, almost stationary movement tracks, inevitably a few more complaints, the laughter of the crowd is not affected by this episode, the sound of the car horn is covered by all the noise, still moving slowly. It seems that the car also melts into this atmosphere and no longer complains.

3, strange couples, different dreams in the same bed, hehe, it seems to be serious.

4. He had a whim in the middle of the night and seemed to have found a solution to this problem.

5. Mine is licensed, charging is always two grids and not rushing, I got the after-sales upgrade, now it seems to be good, if it doesn't work, I will change the machine.

The same structures are: phase (left and right structure) and same (semi-enclosed structure).

The same structures are: phase (left and right structure) and same (semi-enclosed structure). The pinyin is: xiāngtóng. The phonetic pronunciation is: 1. The part of speech is: adjective.

What is the specific explanation of the same, we will introduce it to you in the following aspects:

1. Explanation of terms [click here to view the details of the plan].

Same xiāngtóng. (1) There is no difference between each other.

2. Citations and Explanations.

There is no difference between them. Quoting Tang Liu Zhiji's "Stone Biography": "It is also passed on as a body, which is about the same, and the narrator is multifaceted, and sometimes the ear is different.

Mingzhi Wei Li Zhen's "Answer to Deng Shiyang's Book": "All kinds of clothes and rice in the world are ears, so all kinds of clothes and meals are naturally in it; In addition to food and clothing, there are also so-called people who are different from the people. "Qing Sun Zhiwei's poem "Wu Binxian's Scholar's Burrow":

Mo Yan is handsome and young, and Chu Qu is the same. "For example: roughly the same; The front and back are the same.

3. Chinese dictionary.

There is no difference. Translations of words in English: identical, same, German, gleich, identisch, iso-, homo-, dasselbe (adj), French: identique, égal, même

Fourth, the network explained.

Sameness: Two things do not change much from one of them.

About the same synonyms.

Similar, similar,

About the same antonyms.

On the contrary, the differences are different from each other, and the differences are different.

About the same poems.

Send Wu Chongqing, life and things are slightly the same", "Send Jun Yu's son to the same", "Jihai miscellaneous poems, everything is the same, and it is difficult in ancient times".

About the same verses.

There is a mutual notice, the same is different, the same is not the same, the enemy is not the same, the virgin is the same.

About the same words.

About the same idiom.

Jealousy of the same kind of beauty, jealousy of the same kind, and sympathy for the same disease.

About the same words.

The same kind of jealousy is the same as the beauty, the same is jealous, the same is bright, the same is compassionate, the same sickness is sympathetic, the same voice seeks the same benefit, the same death, the same evil, and the same evil.

About the same sentence formation.

1. Each essay in this collection of essays is written in a different way, with many variations and characteristics.

2. In the world, there are all living beings, and no one is the same as me.

3. The same cause leads to different results.

4. Although these two people's plans are different, they have the same purpose and are implemented in parallel.

5. Strict duality: the upper and lower sentences are required to have the same number of words, the same structure, the parts of speech are relative, and the words cannot be repeated.

Homologues: clusters of methylene atoms with similar structures and molecular compositions.

Structural similarity mainly refers to:

The type and number of functional groups are the same, and the structure of the carbon frame is also the same (if it is a chain, it is a chain, and if it is a ring, it is a ring).

The general formula must also be the same (molecular composition is several different CH2) analysis: structure determines properties, while functional groups determine the properties of organic matter, the structure is similar, the type of functional groups and the number of functional groups should be exactly the same.

For example, ethanol and acetaldehyde are not homologues because the types of functional groups are different; Ethanol and ethylene glycol are also not homologues because of the difference in the number of functional groups.

The carbon frame structure refers to the chain and cyclic shape, such as butane and cyclohexane are not homologues.

The chemical formula is the same, but the structure is different.

Hello dear! "Tong" is a semi-enclosed structure. Same as (pinyin:

tóng, tòng) is a Chinese general standard first-level Chinese character (commonly used characters). The glyph is generally believed to consist of a pictogram and a "mouth" of a four-person tool that is suspected of returning to the skin and carrying things, indicating that the four people used the password to coordinate their actions. The original meaning of the same refers to the joint force and convergence, which is extended to "the same, the same", and from this it is derived from "together, together".

When "same" indicates the object of the action, or the thing that leads to the comparison, it is blurred into a preposition. Same as the meaning of and, used as a conjunction. The above meaning is read tóng.

Same as "世疀 also pronounced tòng, used in the word "hutong", hutong refers to a small alley.