CH3O- هيكل لويس وخصائصه: 17 حقائق كاملة


CH3O- Lewis structure and its characteristics are the representatives of diffident chemical facts regarding the compound, CH3O-. Let us define CH3O- أدناه.

CH3O- Lewis structure is an interesting material in chemistry of Methoxide ion (CH3O-). While drawing the structure of Methoxide demonstrates significant characteristics of different atom such as Carbon (C), Oxygen (O) and Hydrogen (H). This sketch denotes electronic facts about CH3O-.

Chemical and physical both the facts about this compound are revealed by this Lewis structure such as shape, formal charge, bond angle and others. Let us format the facts below in this article.

How to draw CH3O- هيكل لويس؟

The sketch of CH3O- Lewis structure can be drawn by following five easy steps. Let us find the key features of the steps with justified chemical review throughout this section.

الخطوة 1: حساب التكافؤ الإلكتروني

Valence electron calculation in Lewis stricture formation is the most significant factors. This is why it is followed in the very first step of drawing. Number of valence electrons informs the deficiency or lack of electrons in the atoms, which regulates the process of electron share or transfer.

Step 2: Finding centre atom

Finding the centre atom is needed to give proper skeleton to the Lewis structure. Atom with least amount of electronegativity gets the centre position in compounds. In CH3O- Carbon gets the central position, as oxygen is more electronegative than Carbon.

Step 3: Bond representation

Representing the bonds by putting two dots in between the elements as the symbol of electrons is the net step of drawing. This step helps to complete the formation of skeleton of the Lewis structure. Two electron dots denote one sigma bond between two atoms.

Step 4: Lone pair calculation

Calculating the number of lone pairs in the elements can be identified after finding its bonded structure. It is required to identify the lone pairs in the compounds to examine its effect on the geometry and molecular angle of the compound.

الخطوة 5: حساب الرسوم الرسمي

Formal change calculation is last but not the least in the steps of drawing Lewis structure of CH3O-. The negative charge held by the compounds and its appearance is signified through the calculation of formal charge by identifying the same for individual atoms.

CH3O- صدى هيكل لويس

Resonance denotes the internal characteristic of charged compounds that gives alternative structures of similar formula. Let us find the effect of resonance on CH3O-.

CH3O- Lewis structure resonance is quite relevant due to the presence of negative charge on Oxygen. That negative charge of oxygen has a tendency to make pi bonds with carbon but that structure does not get stability due to excessiveness if valence electron s in carbon atom.

After making instable pi bond with carbon the effect of resonance imposes a structure of CH3O-. Therefore, it can be said that the compound has two structure which are called resonating structures of each other.

CH3O- شكل هيكل لويس

Shape is an important physical characteristic, which tells about outlook of a compound after drawing Lewis structure. Let us find the shape of CH3O-.

CH3O- Lewis structure shape is quite unpredictable. Methoxy Group is consisted of a negative charge. Besides, the molecular geometry of CH3O- is predicted as Tetrahedral based in the Lewis structure of four ligands and one centre atom. The presence of lone pair on Oxygen gives a bent shape to the compound.

Now, this group molecule can make bonds to get neutralised structure with any element or compound with positive charge. In that case, the bent shape of the compound can be signified with its ability in forming bonds. CH3OH is the simplest compound with Methoxy group; this can be taken as an example.

CH3O- رسوم هيكل لويس الرسمية

Formal charge calculation is significant for CH3O- group to justify the presence if negative charge on it. Let us calculate the formal charge of Methoxy Group.

There is a specific formula of calculating formal charge. That is as follows: Formal Charge (FC) = Number of Valence electron – Number of bonded electrons – (Number of bonded electrons/2).

The calculation is displayed through the table outlined below:

Elements and their valence electronsNumber of Non bonded electronsNumber of bonded electrons/2اتهام رسمي
C = 4013/34 = 0.382(4-0-2) = 2
H1 = 10½ = 0.5(1-0.5) =0.5
H2 = 10½ = 0.5(1-0.5) =0.5
H3 = 10½ = 0.5(1-0.5) =0.5
يا = 65+1 (extra electron gained) = 6½ = 0.5(6-6-0.5) = -0.5
CH3O-(2-0.5-0.5-0.5-0.5-(-0.5)) = -1
Formal Charge calculation of CH3O-

CH3O- زاوية هيكل لويس

Angle of a compound defines the angular gap between two bonds and it is can be identified easily I reference to the shape of the compound. Let us identify the angle of CH3O-.

CH3O- Lewis structure angle is 109.5°. This is the ideal bond angle of the compounds with tetrahedral molecular geometry. Due to the presence of lone pairs on the Oxygen atom, Methoxy group cannot facilitate its stability with this ideal bond angle.

Generally, the presence of lone pairs or extra electrons and such kind of characteristics distinguish the value of bond angle from its ideal value. In the case of CH3O-, the compound gets bent shape and it creates slight deviation of the compound from ideal bond angle. 

CH3O- حكم لويس هيكل الثماني

Octet rule says that the entire periodic element must have eight electrons in its last valence shell to get ultimate stability like noble gases. Let us define the rule for CH3O-.

CH3O- Octet rule implicates that C and O atoms have extreme urge to fill valence shells with eight electrons.  For Hydrogen, this rule is slightly different as it is present in the period of Helium (Noble gas) which has valence shell with two electrons that also denotes high stability with filled shell.

The Octet rules the driving force for elements share or transfer electrons with others by measuring the deficiency or extensity of electrons in valence shell. However, in CH3O-, Oxygen cannot fill its octet and it has feel a shortage of electron in valence shell that makes it take electron from other element and so it holds a negative charge on it.

CH3O- أزواج هيكل لويس الوحيد

Lone pair count is highly important to identify the idealist match of the compounds. Let us identify the number of lone pairs in the Methoxy group below.

CH3O- Lewis structure has two lone pairs, one single electron, and a negative charge. The central atom, carbon does not hold any lone pars as after binding the compounds get filled valence shells with the help of electrons shared by Hydrogen and Oxygen atoms.

The recognised lone pair on Oxygen atom affects the internal structure or molecular shape of Methoxy Group. There are no lone pairs on the Hydrogen atom as well.

CH3O- إلكترونات التكافؤ

Valence electrons are the factor that is completely related to the Octet rule followed by the elements. Let us calculate the total number of valence electrons present in CH3O-.

CH3O- التكافؤ الإلكتروني calculation is as follows:

  • Number of valence electron in Carbon = 4
  • Number of valence electron in each Hydrogen atom = 1
  • Number of valence electron in total 3 Hydrogen atoms = (1*3) = 3
  • Number of valence electron in Oxygen atom = 6
  • Total number of valence electrons in CH3O = (4+3+6) = 13
  • After putting negative charge on Oxygen the number of valence electrons becomes = (13+1) = 14

CH3O- تهجين

Hybridisation is the factor signifies the combination of electrons in the compounds after sharing it with each other. Let us find the hybridisation of CH3O-.

CH3O- Hybridisation is found as sp3. Tetrahedral shape of the compound is responsible for denoting the hybridisation structure as sp3. C satisfies its s and three p orbitals with the electrons shared by three H and one O atom. Each H also gets filled s orbitals taking one electron from C atom.

After filling the one cannot space by getting remained electron from Carbon, Oxygen has to hold a vacant space in its p orbital that has strong affection towards getting an electron there. Therefore, after having sp3 hybridisation structure the entire compound carries a negative charge on it.

Is CH3O- صلب؟

Solid state of compounds is found by measuring the intensity of internal bond of the compounds. Let us recognise how intact the bonding of the elements in CH3O-.

CH3O- is a solid organic molecular group. This organic group can be found as solid in room temperature as its internal lattice structure, which represents the geometry, is made off strong bonding.

Why CH3O- صلبة؟

CH3O- is solid due to strong electrostatic force between the C-H bonds. On the other side, Oxygen has a tendency to create double bond with Carbon though that is not stable but still it gives strengthen the overall, geometry. The elements are quite similar in size therefore; the bonds make it solid.

Is CH3O- يذوب في الماء؟

Solubility in water depends on temperature and other circumstances in which the compound is kept. Let us determine the solubility of the Methoxy group in water below.

CH3O- is highly soluble in water. More or less any compound containing Methoxy group can be considered as soluble in water. Except the ring compound takes time to dissolve in water or in high temperature and pressure even after containing CH3O-.

Why CH3O- قابل للذوبان في الماء؟

CH3O- is soluble in water due to the presence of H- bonding which is stronger than other bonding. Now the attraction between Water and Methoxy group is unique which drives the molecules dissolve in water. Polarity of water molecule is mainly responsible for H-bonding in CH3O-.

Is CH3O- قطبي أم غير قطبي؟

Polarity of a compound depends on its shape and effect of lone pairs. Let us justify the Methoxy group as polar or non-polar.

CH3O- can be considered as a Polar compound. CH3O- contained organic compounds are mostly considered as polar with a specific amount of dipole moments. Not only the group but CH3O- containing compounds also shows polarity naturally.

Why CH3O- هل القطبية؟

CH3O- is polar due to its bent tetrahedral geometry. This creates an asymmetric geometry internally. Therefore, the dipole moment of the terminals do not get chance to be cancelled out.  In this way, it becomes polar.

Is CH3O- molecular compound?

Molecular compounds refer to those compounds, which represent the real number of molecule and bonds present in it. Let us identify if CH3O- is molecular or not.

CH3O- is a molecular compound.  This is a group of molecular with a negative charge that can easily create bond with any positively charged elements. It means it shows extensity of electrons in its internal structure.

ch3o- lewis structure
CH3O- هيكل لويس

Why CH3O- is Molecular?

CH3O- is molecular due to the presence of specific number of molecule in it. There is one C, Three H and one O molecule creates bonds with each other and forms this group of elements. However, C has uncertainty of making double bond with O molecule it can be considered as molecular by other aspects.

Is CH3O-حمض أم قاعدة؟

According to Lewis, acidity depends on the electron acceptance ability of compound and basicity on their electron donation ability. Let us identify the nature of CH3O-.  

CH3O- is less acidic and found to be more basic. This organic group is unique and exposes it ability of donating electron. The oxygen atom is mostly responsible for making the overall compound less acidic by nature. CH3O- is conjugate base of Methanol (CH3OH).

Why CH3O- هي القاعدة؟

CH3O- is a base as it has negative charge. Negative charge of a compound exposes the electron extensity in a compound. That extra valence electron in the compound makes it base and creates ability of donating e- to make bonds conjugate acids like H+.

Is CH3O- بالكهرباء؟

Electrolytic nature of compounds stands for the capability of compounds to conduct electricity in molten state. Let us signify if CH3O- هو المنحل بالكهرباء أم لا.

CH3O- is an electrolyte. It means that the anion is superior to dissolve in water and conduct electricity by the presence of a negative charge in it. The presence of negative ions electron density in the group increases which is suitable criteria for making it an electrolyte.

Why CH3O- هو المنحل بالكهرباء؟

CH3O- is an electrolyte as it is an anion. An anion in chemistry refers to high capability of conducting electricity with the help of the extra valence electron present in it. This conjugate base dissolves in polar solvents like water easily and exposes its electrolytic nature by conducting current.

Is CH3O- ملح؟

Salt are generally the neutral compounds that are formed by bonding between two opposite ions. Let us describe this fact if applicable for Methoxy group.

CH3O-cannot be considered as a salt. Clearly, this organic group is a conjugate base of compound that contains hydroxyl group. Methoxide or Methoxy group relevantly displays its high electron density and electron donation capacity, which signifies that CH3O- is not a salt.

Why CH3O- ليس ملح؟

CH3O- is not a salt as it is not a neutral compound. Even after being dissolved in water so easily it is not acknowledged as salt due to the presence of an ion. After making bond with its conjugate acid, it can be considered as a salt but not before that anyway.

Is CH3O- الأيونية أو التساهمية؟

Ionic and convalesce bonds of the compounds are formed by depending on electron transfer and sharing method respectively. This section would describe this fact for CH3O-.

CH3O- is a covalent organic compound.  Involvement of almost all the valence electrons in formation of bonds activates the process of making covalent bonds among atoms. C, H and O all the molecules follow the octet rules of valence electrons and makes covalent bonds with each other’s.

Why CH3O- is Covalent?

CH3O- is covalent as atoms make covalent bond with each other’s. Valence electrons of each atom impose the significance of making bonds to fill their octet state. Eight numbers of electrons in last shell is the fact that gives stability and makes cooperation between valence electrons of atoms in CH3O-.

في الختام

This article has identified the tetrahedral shape and distinguishable bond angle of Methoxy group (CH3O-). Its chemical properties and facts behind holding negative charge have been delivered in the article with chemical overview.

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