- Which best describes a sawhorse projection?
- Who invented the sawhorse?
- What is gauche conformation?
- What is staggered and eclipsed conformations?
- Which is more stable eclipsed or staggered?
- What is sawhorse representation?
- What is Newman projection formula?
- What does enantiomer mean?
- Which Newman projection has the highest energy?
- What is an anti conformation?
- What is sawhorse projection in chemistry?
- What is projection formula in chemistry?
- How do you assign R and S?
- What is S and R in organic chemistry?
- What is the most stable Newman projection?
- What is torsional strain?
Which best describes a sawhorse projection?
Which BEST describes a sawhorse projection.
This projection views the carbon-carbon bond at an angle and, by showing all the bonds and atoms, their spatial arrangements are indicated..
Who invented the sawhorse?
SawhorseThe Sawhorse and Jack Pumpkinhead in Marvel’s Marvelous Land of OzOccupationWagon PullerAffiliationOzma (creator), Jack Pumpkinhead, Land of OzFirst AppearanceThe Marvelous Land of Oz (1904)6 more rows
What is gauche conformation?
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 staggered and eclipsed conformations?
In an eclipsed conformation the carbons are aligned so that the hydrogens are lined up with each other. This creates steric hindrance between them. In a staggered conformation the atoms are all equally spaced from each other.
Which is more stable eclipsed or staggered?
1 Answer. A staggered conformer is more stable than an eclipsed conformer as the latter involves unfavourable energy interactions between atoms. … In contrast stands the eclipsed conformation where the H atoms line up perfectly!
What is sawhorse representation?
Sawhorse projection: A representation of molecular structure, from an oblique angle. Somewhat similar to Newman and zig-zag (Natta) projections. The sawhorse projection is named after its similar appearance to a carpenter’s sawhorse. Sawhorse projection.
What is Newman projection formula?
A Newman projection, useful in alkane stereochemistry, visualizes the conformation of a chemical bond from front to back, with the front atom represented by a dot and the back carbon as a circle. … This type of representation clearly illustrates the specific dihedral angle between the proximal and distal atoms.
What does enantiomer mean?
Enantiomers are chiral molecules that are mirror images of one another. Furthermore, the molecules are non-superimposable on one another. This means that the molecules cannot be placed on top of one another and give the same molecule.
Which Newman projection has the highest energy?
If we now rotate the front CH3 group 60° clockwise, the molecule is in the highest energy ‘eclipsed’ conformation, where the dihedral angles are all 0o (we stagger the bonds slightly in our Newman projection drawing so that we can see them all).
What is an anti conformation?
Consider a compound that has the following structural formula. The following staggered conformation, in which the dihedral angle between X and Y is 180°, is called the anti conformation.
What is sawhorse projection in chemistry?
Like with Newman Projections, a Sawhorse Projection is a view of a molecule down a particular carbon-carbon bond, and groups connected to both the front and back carbons are drawn using sticks at 120 degree angles.
What is projection formula in chemistry?
A Fischer projection or Fischer projection formula is a convention used to depict a stereoformula in two dimension without destroying the stereochemical information, i.e., absolute configuration, at chiral centers.
How do you assign R and S?
Assigning R and S Configuration: Steps and RulesGive each atom connected to the chiral center a priority based on its atomic number.Draw an arrow starting from priority one and going to priority two and then to priority 3: If the arrow goes clockwise, like in this case, the absolute configuration is R.
What is S and R in organic chemistry?
A counterclockwise direction is an S (sinister, Latin for left) configuration. A clockwise direction is an R (rectus, Latin for right) configuration.
What is the most stable Newman projection?
The most stable one would have the rear hydrogen in between the front methyl and bromine in a staggered conformation to minimize [lone-pair]-[bonding-electron] repulsions. 4) Rotate the rear groups on the C2−C3 bond 120∘ counterclockwise from the Newman projection shown, and you’ll have it.
What is torsional strain?
Torsional strain or eclipsing strain is the increase in potential energy of a molecule due to repulsion between electrons in bonds that do not share an atom. Consider two conformations of ethane: The smallest dihedral angle is 60º in 1; it is 0º in 2. … Consequently, torsional strain is greater in 2 than in 1.