Structural formulas Newman projections

Fischer projections, 271-272, 292-293, 973-974, 977, 1007, 1056,1103 Lewis dot structures, 12 Newman projections, 90-92, 95 Structural formulas—Cent. of organic molecules, 19—21 sawhorse, 90—91 wedge-and-dash, 26, 28, 91 Structural isomers. See Constituhonal isomers Structural theory, 3... 

What products are obtained from the reaction between benzaldehyde and butanone in the presence of base (NaH, room temperature) Draw the structural formulae of all of the reaction products in spatially correct Newman projections. Chose the conformation in which the phenyl and carbonyl groups are antiperiplanar to one another. 

Draw the structural formula of 2,2-dichloro-l,l-difluoro-4,4-dimethylcyclo-hexane as a Newman projection formula viewed along the C1-C2 and C5-C4 bonds. Assume that the compound adopts a chair conformation. 

Draw the structure of ( , )-3-chloro-4-fluoro-l,l-dimethylcyclohexane as a Newman projection formula viewed along the C6-C1 and C4-C3 bonds. (The chlorine and fluorine atoms should be drawn antiperiplanar to each other.)... 

New problems show the student how to interconvert and name structural formulas and Newman projections. 

When we do conformational analysis, we will find that certain types of structural formulas are especially convenient to use. One of these types is called a Newman projection formula and another type is a sawhorse formula. Sawhorse formulas are much like dash-wedge three-dimensional formulas we have used so far. In conformational analyses, we will make... 

For practice interconverting between Newman projections, Fischer projections, perspective formulas, and skeletal structures, see the tutorial on page 187. 

Converting from a Newman projection to (or from) a Fischer projection, a perspective formula, or a skeletal structure is relatively straightforward, if you remember that a Fischer projection represents an eclipsed conformer. (Recall that in a Fischer projection, the horizontal lines represent bonds that point out of the plane of the paper toward the viewer, and the vertical lines represent bonds that point back from the plane of the paper away from the viewer.)... 

Newman projection formulas of structures concentrate on the two carbon atoms around which rotation may occur. The two atoms are viewed end on. The ftont atom is represented by a point with three bonds. The back atom is represented by a circle with three bonds that reach only to the perimeter of the circle. Although there is a bond between the two carbon atoms, it is hidden because it is located along the viewing axis. 

This is a problem similar to 5-29, except that the structures are written mostly as projection formulas of the Fischer or Newman type. Determine the relationship between the pairs of compounds as one of the following identical, position isomers, enantiomers, diastereomers, conformational isomers, or cis-trans isomers. (D stands for deuterium, the hydrogen isotope of mass 2.)... 

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