how to draw newman projections from chair conformation

Draw a line structure consistent with these Newman projections. So thats the front of it.

Double Newman Projection Chair Cyclohexane Youtube

In step 1 two circles are drawn side-by-side.

. The a or e bonds on four carbons C1 C2 C4 and C5 are shown explicitly while the bonds on C3 and C6 are just shown as CH 2. After you have drawn the chair conformation the next step is to number the carbons. But unlike the axial line this one will start on the carbon and form a slight angle outward of the chair drawing.

How to draw a Newman Projection 1. Lets compare it to the situation where our methyl group is equatorial where the carbon that its. Add the groups here they are H atoms to the bonds.

Make sure front connects to front and back connects to back. When drawing Newman projections look at the molecule from a. Draw connections over to parallel Newman projection.

Draw the skeletal structure. We actually use what amounts to two Newman projections stuck together and we call it a double Newman. H This single bond fixes all of the other bonds in the Newman projection.

It is gauche to carbon number three. Draw an eclipsed Newman projection with three sticks on the back carbon and three on the front. Draw your biggest substituent on the front on the up.

Have a stick up on both the back and front carbons. So maybe theyre crowding each other a little bit. Additionally either bond-line or Newman formulas reveal that the two hydrogen atoms at each CH2 are not the same.

This question takes a complicated substituent filled Chair Conformation and transforms it into a Newman Projection. Draw the equatorial substituent up or down the reverse of the axial substituent. You have a hydrogen there you have this hydrogen you have that hydrogen and then you have that blue or I guess that purple hydrogen down here.

Draw the Newman projection for each of the labelled bonds. Uottawaca jdeng085 CHM 1321 DGD 3 Newman Projectionsand Chair. Pick any ONE carbon and locate its axial substituent.

Converting Cyclohexane Chair to Double Newman Projection Tutorial Video. View 3 - Newman and Chairs Answers - Mondaypdf from CHM 1321 at University of Ottawa. So as a Newman Projection the fronts going to look the same.

When looking at the alkane you want to decide which bond you will be looking at and from which side. Now lets draw the eclipsed conformation as a Newman Projection. The bridging carbon in the back is drawn in step 3.

Newman projections are drawn by looking directly along a particular bond in the system here a C-C bond and arranging the substituents so that they are equally spaced around the atoms at each end of that bond. Stagger back groups relative to front groups. How to draw a Newman projection of a cyclohexane ring.

When you use the Newman projection this is only a 60-degree angle. Cyclohexane chair conformations can also be portrayed through a Newman projection but its a little bit different. This means you could go counterclockwise or clockwise.

Divide front view into thirds. Newman projections focus on any two carbons and the groups coming off them in a molecule by shifting the view from which the molecule is visualized. To draw a basic chair conformation start by drawing two sets of parallel lines and connect them like seen above.

A Newman projection of a chair conformation of cyclohexane clearly shows that torsional strain is minimized since all groups are staggered. Add the other two front. A Newman projection is a way to take a snapshot of what a molecule looks like at a particular moment in time from a different angle than were used to.

This will usually be indicated by an arrow showing the front carbon or the dot of your Newman projection. A Newman projection of a chair conformation of cyclohexane clearly shows that torsional strain is minimized since all groups are staggered. Additionally either bond-line or Newman formulas reveal that the two hydrogen atoms at each CH2 are not the same.

A step-by step procedure for drawing the chair form in Newman project follows. Lets draw one for 1R2R4S-4-chloro-2-iodo-1-methylcyclohexane. Add the groups here H atoms to the bonds extending from the Newman projections then repeat the process for the boat form.

Do NOT draw these straight in the x or y plane. Draw side-by-side projections of the C1-C2 and C5-C4 bonds. The bridging carbon at the apex of the chair is sketched in step 2.

Find the side view you are going to be using. In this video I demonstrate how to draw the double Newman projection for a tri substituted cyclohexane. Looking at the glucopyranose from above you now can easily draw the chair conformation for it in a general form.

The vertical red C-H bonds are the a. Step 4 illustrates the addition of substituents to the front set of carbon atoms. Notes for Newman projections of the chair conformation refer to the drawing below.

Join the two diagrams with the front carbon C-6 at the top and the rear carbon C-3 at the bottom. Test your understanding with this Chair Conformations of Cyclohexane Quiz as part of the Cyclohexane Chair Conformation Video Tutorial Series. You can take on any perspective you wantas long as the bonds stay the same.

Draw your biggest substituent on the back carbon on the up stick 3. The cool thing about this is that it doesnt matter which way you number the carbons. Draw side-by-side projections of the C1-C2 and C5-C4 bonds then join the two diagrams with the front carbon C-6 at the top and the back carbon C-3 at the bottom.

Haworth projection and chair conformation of glucopyranose And just as easily you can show a chair conformations specifically for. For the chair form view the diagram so that the carbon atom nearest to you C-6 is up C-2 is behind C-1 and C-4 is behind C-5. How do you draw Newmans projections.

CHM 1321 DGD 3 Newman Projectionsand Chair Conformation For help going between perspectives.

Org Chem Quick Reference On Cyclohexane Newman Projections Youtube