Perspective drawing, wedge-bond

Use wedge-bond perspective drawings (if necessary) to sketch the atom positions in a general molecule of formula (not shape class) AX that has each of the following shapes ... 

The lowest priority group is directed toward you. If the perspective drawing contains the lowest priority group on a wedged bond, read the priority of the other three groups, but assign a configuration that is opposite to what is actually read. 

FiyurC 22.7 Components of a coordination compound. Coordination water, the six ligands remain bound in the complex ion. B, IR(NH3)4)Br2 compounds are shown as models (top), wedge-bond perspective draw- has four NH3 ligands and two Br counter ions, ings (middle), and formulas (bottom), ft, NUen Co(NH3)( lCl3 dissolves in... 

Make certain when you draw a perspective formula that the two bonds in the plane of the paper are adjacent to one another neither the solid wedge nor the hatched wedge should be drawn between them. 

Open computer molecular models for dimethyl ether, dimethylacetylene, and OT-l,2-dichloro-l,2-difluoroethene from the 3D Molecular Models section of the book s website. By interpreting the computer molecular model for each one, draw (a) a dash formula, (b) a bond-line formula, and (c) a three-dimensional dashed-wedge formula. Draw the models in whatever perspective is most convenient—generally the perspective in which the most atoms in the chain of a molecule can be in the plane of the paper. 

Draw a three-dimensional perspective representation for the compound showing approximate bond angles as clearly as possible. Use ordinary lines to indicate bonds in the plane of the paper, solid wedges for bonds in front of the pap>er, and dashed wedges for bonds behind the paper. 

Albuterol, shown here, is a commonly prescribed asthma medication. For either enantiomer of albuterol, draw a three-dimensional formula using dashes and wedges for bonds that are not in the plane of the paper. Choose a perspective that allows as many carbon atoms as possible to be in the plane of the paper, and show all unshared electron pairs and hydrogen atoms (except those on the methyl groups labeled Me). Specify the R,S) configuration of the enantiomer you drew. 

The efficiencies of drawing bond-line formulas come from the fact that no Cs are written for carbon atoms, and generally no Hs are shown for hydrogen atoms, unless they are needed to give a three-dimensional perspective to the molecule (and in that case we use solid or dashed wedges for bonds to the out-of-plane atoms, as described in the following section). Instead, in bond-line formulas ordinary lines represent bonds, and carbon atoms are inferred at each bend in the line and at the ends of lines. 

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