how to draw newman projections from chair conformation

We actually use what amounts to two Newman projections stuck together and we call it a double Newman. Add an eye with an arrow looking down the carbon-carbon bond being studied.

How Can I Draw A Newman Projection For Cyclohexane Class 12 Chemistry Cbse

So as a Newman Projection the fronts going to look the same.

. How to draw a Newman projection of a cyclohexane ring. Step 4 illustrates the addition of substituents to the front set of carbon atoms. So you can see that we alternate.

You may assume that a CH. The protocol requires that the atoms within the central bond are shown as a dot and circle as defined below. Looking at the glucopyranose from above you now can easily draw the chair conformation for it in a general form.

In step 1 two circles are drawn side-by-side. Converting Cyclohexane Chair to Double Newman Projection Tutorial Video. We go to carbon two.

Divide front view into thirds. Draw your biggest substituent on the front on the up. After you have drawn the chair conformation the next step is to number the carbons.

Draw the equatorial substituent up or down the reverse of the axial substituent. Add the groups here they are H atoms to the bonds. Add the other two front.

The bridging carbon at the apex of the chair is sketched in step 2. 1 From the first left structure rotate the C_2-C_3 bond 60 counterclockwise with your right hand to achieve the staggered conformation. A step-by step procedure for drawing the chair form in Newman project follows.

Now lets draw the eclipsed conformation as a Newman Projection. Join the two diagrams with the front carbon C-6 at the top and the rear carbon C-3 at the bottom. In the video below Ive distilled the process for doing this and I guide you through two examples.

To make the Newman projection it helps to progress to a Sawhorse projection and that should help you see where you can go to condense the structure down into the Newman projection. Make sure front connects to front and back connects to back. But unlike the axial line this one will start on the carbon and form a slight angle outward of the chair drawing.

Label wedge groups as pointing Up and dash lines as pointing Down. Therefore the two largest substituents on each carbon of the Newman projection are as far apart from one another as possible. As mentioned earlier for drawing a Newman projection of a molecule the bond and the viewers angle must be given.

Test your understanding with this Chair Conformations of Cyclohexane Quiz as part of the Cyclohexane Chair Conformation Video Tutorial Series. Number the atoms in the ring the starting point and the direction doesnt matter. Once youve mastered the art of naming alkanes sooner or later in organic chemistry youre going to have to draw Newman projections.

Stagger back groups relative to front groups. If we start at carbon one we start up axial so lets go ahead and put in the axial hydrogens on our Cyclohexane on our chair conformation. In this case we will go clockwise.

The bridging carbon in the back is drawn in step 3. This question takes a complicated substituent filled Chair Conformation and transforms it into a Newman Projection. Add the groups here H atoms to the bonds extending from the Newman projections then repeat the process for the boat form.

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. Using the Newman projection templates provided draw all three eclipsed conformations in Newman projection form in order of increasing stability about the C1 9 C2 bond. Draw side-by-side projections of the C1-C2 and C5-C4 bonds.

In this video I demonstrate how to draw the double Newman projection for a tri substituted cyclohexane. You have a hydrogen there you have this hydrogen you have that hydrogen and then you have that blue or I guess that. And not just draw them but convert between them and line-bond aka bond-line or zig-zag structures.

Depending on the angle the Newman projections of a given molecule may look completely different. Have a stick up on both the back and front carbons. So here is carbon one.

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. Draw connections over to parallel Newman projection.

We draw a line straight down and put in a hydrogen. Lets draw one for 1R2R4S-4-chloro-2-iodo-1-methylcyclohexane. The cool thing about this is that it doesnt matter which way you number the carbons.

Pick any ONE carbon and locate its axial substituent. Determine which two carbon atoms are being studied. The most stable form of the Newman projection is the anti conformation.

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. A Newman Projection focuses on one specific bond of the molecule and note which atoms are attached to these carbon atoms. Do NOT draw these straight in the x or y plane.

Haworth projection and chair conformation of glucopyranose And just as easily you can show a chair conformations specifically for. A Molecule Can Have Multiple Newman Projections. In this form the largest substituent coming off the front carbon is exactly 180 o degrees away from the largest substituent on the back carbon.

H This single bond fixes all of the other bonds in the Newman projection. Draw an eclipsed Newman projection with three sticks on the back carbon and three on the front. Were gonna draw a line straight up and put in a hydrogen.

Is larger than 3 Br atom and a Br atom is larger than a H atom. To draw a basic chair conformation start by drawing two sets of parallel lines and connect them like seen above. For example if we were to look through the C1-C2 bond of the previous molecule.

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. Draw your biggest substituent on the back carbon on the up stick 3. Up and Down is relative as it depends on the direction you are looking from but lets follow this notation.

2-3 means looking down the carbon 2 and carbon 3 bond.

1 3 Diaxial Gauche Interactions Chair Methylcycohexane Interactive Chemistry Free Energy

Newman Projections Youtube

Solved Draw The Molecule Below In Each Of Its Chair Conformations Br C Chah Represent Each Chair Conformation As Newman Projection Where The Br And The Ch Group Is On One Of The Side