Stereochemistry Class 12 Notes English 2022 stereochemistry class 12 stereochemistry class 12 ncert pdf stereochemistry class 12 pdf stereochemistry notes class 12 pdf stereochemistry notes class 12 pdf stereochemistry class 12 ncert pdf stereochemistry notes pdf
Stereochemistry Class 12 Notes English 2022
what is stereochemistry in organic chemistry stereochemistry pdf stereochemistry class 12 pdf stereochemistry class 12 notes stereochemistry notes pdf stereochemistry class 12 ncert pdf stereoisomerism pdf notes
Stereoscopic chemistry, Stereoscopic, Optical isomerism, Configurations in Cyclo Hexane, Neumann Projection, Adopted form, Contiguous form, Sawhorse diagram, conformational isomerism, Hydrogen bonding, Effect of heat, Melting point and boiling poin, dipole moment, Properties of geometric isomers, Cycloalkane,oxime
What is stereochemistry Class 12? What is stereochemistry Byjus? What is stereochemistry and types? What are stereoisomers Class 12?
Stereoscopic chemistry :- The branch of chemistry under which the orientation of a compound is expressed in stereoscopic 3D is called three-dimensional chemistry, so under this the conditions of that compound are expressed on the basis of the free spin of the compound in this branch of chemistry. The 3D isomerism is explained on
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(b) oxime [=C=N] :- This isomerism is of two types in aldoxime and ketoxime.
Syn – (Syn) = z form
Per – (ant) = E form
In aldoxime and ketoxime, the small OH group attached at C and the bonding group on nitrogen on the same side will be Sr (Z form) and if on opposite side it will be Anti (E form).
(c) Azo (-N=N-) :- In this also this isomerism is of two types (Sin and Prati).
If the joining atom or group on both the N atoms is on the same side then it will be syn and if it is on opposite side then it will be anti
(d) Cycloalkane :- In this too, there are two types of isomerism pros and cons.
In the structure of a cycloalkane, if the atom or group attached to two adjacent carbons is on the same side, then it is opposite (Z form) and if it is attached on the opposite side then it will be opposite (E form).
Properties of geometric isomers
(a) dipole moment
If two carbons with double bonds in an alkene have groups of similar nature attached to them, then the dipole moments of the similar structures are relatively high.
If the bonded groups on the double bonded carbons are of different nature (electron donor and second electron acceptor), then the dipole moment of the opposite form will be greater.
(b) Melting point and boiling point
(c) Effect of heat – image
In alkenes, the melting point of a side structure is lower than the boiling point (heat) opposition structure because additional energy is required to convert the opposition structure to the face structure first, then the product is formed, whereas the product can be formed directly from the side structure. Goes
(d) Hydrogen bonding : – Intermolecular hydrogen bond is formed in the right side and intermolecular hydrogen bond is found in the opposite.
(e) conformational isomerism – in this, the molecular formula and IUPAC names of compounds remain the same but differ in their forms.
This isomerism is represented by two adjacent carbon atoms (two sp3 structures) in a compound.
(A) Sawhorse diagram : – If the structure of both adjacent sp3 structure carbon atom O is seen slightly obliquely, then both the carbon and the single bond formed between them is clearly visible, this is called Sawhorse diagram.
In this the structure appears as a diagram
(1) Contiguous form – In this, all the bonds formed on the two adjacent carbon atoms are parallel to each other in the opposite direction.
In other words, all the three bonds formed on one carbon are formed in the form of straight Y while all the three bonds on the adjacent second carbon are formed in the form of inverted Y.
(2) Adopted form – In this, all the bonds formed on the two adjacent sp3 form carbon atoms are parallel to each other on the same side.
In other words, the bonds formed on both the carbons are in the form of straight Y, straight Y and inverted Y, inverted Y.
(B) Neumann Projection :- In this, when looking at the structure made of both adjacent sp3 structure carbon atom O, the front carbon is visible while the back carbon and the single bond formed between them are not visible, hence the structure in Newman projection Will appear in circular form.
Configurations in Cyclo Hexane :- Two types of structures are found in Cyclo Hexane
Q – 1 Which one is more stable in the modified form and the affected form and why?
Ans – The distance between mutually parallel bonds in the convergent form is large while in the affected form is less, so due to the greater distance in the converged form, the repulsive force will be less, which will increase the stability.
Optical isomerism :- next update coming soon
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