Methanol or Methyl alcohol is one of the compounds that are offered to understand the molecule geometry, bonds, and much more in organic chemistry. This compound has actually a hydroxyl team ( OH) attached to the methyl group, and that is wherein it it s okay its surname of “methyl alcohol.” To do it much easier for you to understand, assume the one hydrogen atom that methane or CH4 is substituted through a hydroxyl group, causing Methanol having actually the chemistry formula that CH3OH

Methyl alcohol is a light, colorless, and also volatile liquid v an alcohol addict odor comparable to ethanol. The molecule’s structure is simple to understand, and one can also use this instance to research more complex structures in organic chemistry. To understand the structure and shape of this compound, it is an important to recognize its valence electrons and also Lewis structure.

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Contents


CH3OH Valence Electrons

Methanol is composed of one carbon atom, three Hydrogen atoms, and also one hydroxyl group. To understand the total variety of valence electrons, we need to know the valence electrons of every the atoms individually:

Carbon has four valence electrons in its outer shell, therefore the valence electron in Carbon= 4.

Hydrogen has actually only one valence electron, yet as there room three Hydrogen atoms in this compound, the total variety of valence electrons for Hydrogen = 3*1= 3.

Oxygen has six valence electrons in its external shell and needs 2 electrons to monitor the octet rule; therefore its valency is 6.

Hydrogen attached come the Oxygen in the hydroxyl team has one valence electron; therefore its valency is 1.

Total number of valence electrons in CH3OH = 4 + 3+6+1

= 14

Thus the total variety of valence electrons in CH3OH ( Methanol) is 14.

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Octet Rule

In chemistry, every the atoms tend to end up being inert by attaining the electronic configuration of the noble gas that has actually eight electron in its outer shell. Therefore all the atoms tend to type bonds in achieve this configuration and also become stable. This dominion has some exceptions in chemistry, however majorly, all facets follow this octet rule.

CH3OH Lewis Structure

Lewis dot framework is a pictorial representation of the molecule, it’s bonding with various other atoms and also the setup of atom in the compound. It helps in discovering the variety of bonded electrons, lone pairs, and the compound’s molecular shape. Valence electrons help in illustration this Lewis structure, as all the electron are shown by using dots, and also the straight lines stand for the bonds formed in between the molecules. 

Here in CH3OH, 

There space a total of 14 valence electrons in the compound. Carbon has a steric number of 4 together it has four valence electrons in its outer shell. In Methanol, Carbon is the central atom, and all the other atoms room placed approximately it.

For drawing the structure, you can place 4 electrons ( together dots ) around the main carbon atom in all 4 directions. Now all the Hydrogen atoms have one valence electrons, and all these 3 atoms form a bond with Carbon by sharing one electron of the Carbon atom. To stand for these bonds, attract straight lines between three Hydrogen atoms and also the central carbon atom. 

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Hydroxyl team ( OH) share one valence electron v Carbon, and also thus this hydroxyl group creates one bond v the Carbon by share its valence electron. Over there are 4 valence electrons left in the outer shell of the oxygen atom as it shares one of its 6 valence electrons with Hydrogen and another one through the Carbon atom. Still, there are four valence electron on the Oxygen atom that forms two lone bag of electrons around it. Therefore all the valence electrons of the Carbon atoms have now developed bonds, and there are no lone bag or non-bonded electrons on the main Carbon atom however Oxygen has two lone pairs of electrons.

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CH3OH molecule Geometry

Now that we recognize the Lewis framework of CH3OH, it is basic to depict the compound’s molecular geometry. While drawing the Lewis framework for CH3OH, you will notice that the Carbon atom will have actually three bonds with 3 hydrogen atoms and also one bond v the Hydroxyl Group

As the Carbon has four valence electron that type the bond with other atoms, it mirrors sp3 hybridization. 

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CH3OH Shape

The hybridization the the main atom ( Carbon ) in CH3OH is sp3, which way that the should kind a tetrahedral shape, but it doesn’t type this shape exactly. The shape of Methanol is bent due to the fact that the hydroxyl team ( OH) contains two lone pairs of electrons, which cause the repulsion in between the bonded pair of electrons and also the non-bonded pair of electron in the compound. These repulsion pressures lead to details of a bend structure.

According to some theories, it is also believed that CH3OH has actually two geometric centers, one for the Carbon atom and also another because that the Oxygen atom in the hydroxyl group. The main carbon atoms form four sigma bonds and have no lone pairs, which results in the development of a tetrahedron. Simultaneously, the Oxygen atom develops two sigma bonds and two lone bag of electrons, which causes a bent in the link angle because of the repulsion forces. For this reason Oxygen has a bending tetrahedral shape, causing the bent shape of Methanol. 

Concluding Remarks

The framework of Methanol or CH3OH is comparatively simple to research as the valency the the central Carbon atom is totally satisfied, and there are no lone pairs on the carbon atom. The atom shares 3 of its 4 valence electrons v Hydrogen atoms and rests one electron through the hydroxyl group. Main Carbon atom has actually sp3 hybridization and also a bent molecule shape due to the repulsion in between lone bag on Oxygen and the bonded bag in the molecule.