What does Diaxial mean?

Diaxial: A pair of atoms or groups that are both in an axial position on a cyclohexane ring.

What are gauche interactions?

Gauche: The relationship between two atoms or groups whose dihedral angle is more than 0o (i.e., eclipsed) but less than 120o (i.e., the next eclipsed conformation). A conformation which has one or more gauche interactions is can be called a gauche conformation.

What is the energy cost of a 1/3 Diaxial interaction between a chlorine and a methyl group?

10,96 kJ/mol
Thus the energy cost of a1,3 diaxial interaction between a chlorine and a methyl group is 10,96 kJ/mol.

What is 1/3-Diaxial interaction in cyclohexane derivatives explain with an example?

1,3-Diaxial interactions are steric interactions between an axial substituent located on carbon atom 1 of a cyclohexane ring and the hydrogen atoms (or other substituents) located on carbon atoms 3 and 5. Be prepared to draw Newman-type projections for cyclohexane derivatives as the one shown for methylcyclohexane.

Is gauche a Diaxial interaction?

So, the 1,3-diaxial notation is the most common way we refer to the gauche interactions of axial groups in the chair conformations. Generally, the axial conformation of a given cyclohexane is less stable than the corresponding equatorial conformation.

What is torsional strain in physics?

Torsional strain, where conformations are not staggered, is characterised as the strain encountered by the bonds. So, there is torsion pressure at any angle other than 60, 120, or 180. In addition, only in atoms divided by only three bonds can torsional strain ever occur.

How many gauche interactions are there?

Thus there are four gauche butane interactions.

What is anti and gauche?

In the most stable conformation, the two methyl groups lie as far apart from each other as possible with a dihedral angle of 180 degrees. This particular staggered conformation is called anti. The other staggered conformation has a Me-Me dihedral angle of 60 degrees and is called gauche.

How many gauche interactions are there between the methyl group and the ring for Equatorial methylcyclohexane?

two gauche interactions
Since there are two gauche interactions, and the strain energy is 1.70 kcal/mol, it’s easy to calculate the value of each interaction: 0.85 kcal/mol .

Why does axial methyl have a 1 3 diaxial interaction?

On the other hand, when the methyl is axial, it lacks space (steric interaction) mainly due to the hydrogens that are also on axial pistons. Notice also that, these groups (the axial methyl and the hydrogens) are one-carbon apart and if we number, we can see that their relative position is 1,3 and that is why it is called 1,3-diaxial interaction:

How does 1 3-diaxial interaction increase the potential energy of a molecule?

The 1,3–Diaxial interaction increases the potential energy of the molecule by a few calories depending upon the bulkiness of the substituent attached to the cyclic hydrocarbon molecule. The most common case is of cyclohexane in its chair form, possess steric interaction between the alternate axial substituents.

What is the 1 3 diaxial interaction of cyclohexane?

The 1,3–Diaxial interaction is commonly observed in the case of cyclohexane molecule in chair form. The chair form of substituted cyclohexane either have substituted atom/ group at axial position or at equatorial position.

What is a diaxial interaction in physics?

Possibly you could just say “an interaction at 1,3”. As an added note, mathematically, stating diaxial can be useful, because it means the interaction occurs on an ideal 2-d plane. Sometimes ideal 2-d planes are okay in physics, because the output values are being interpreted in terms of that ideal plane.