Question 1

In a skeletal formula, which type of wedge indicates that an atom or group is coming out of the plane of the page towards the observer?

Accepted Answer

Solid wedge

Question 2

Which group in the following structure is below the plane of the drawing?

$$\ce{HO-CH2-CH(NH2)-CH3}$$

Given that the NH$$_2$$ group is shown with a dashed wedge, what does this indicate?

Accepted Answer

NH$$_2 is $$below the plane

Question 3

If a molecule is drawn with a solid wedge for the OH group and a dashed wedge for the NH$$_2$$ group, which statement is correct?

Accepted Answer

OH is above the plane, NH$$_2 is $$below the plane

Question 4

When transforming a skeletal formula so that groups 1 and 2 come out of the page and group 3 goes inside the page, which wedge types should be used for each group?

Accepted Answer

Groups 1 and 2: solid wedge; Group 3: dashed wedge

Question 5

Which of the following best describes the spatial arrangement of atoms in a molecule using solid and dashed wedges?

Accepted Answer

Solid wedges indicate atoms coming out of the page; dashed wedges indicate atoms going inside the page

Question 6

A student draws a molecule with a solid wedge for a methyl group and a dashed wedge for a hydroxyl group. Which group is closer to the observer?

Accepted Answer

Methyl group

Question 7

In the context of stereochemistry, what is the significance of using wedges in skeletal formulas?

Accepted Answer

They show the three-dimensional arrangement of atoms

Question 8

Given the following skeletal formula, which group is inside the plane of the page?

$$\ce{CH3-CH(Br)-CH2-CH3}

If Br is $$shown with a dashed wedge, what does this mean?

Accepted Answer

Br is inside the plane

Question 9

Which of the following is a correct application of solid and dashed wedges in representing the stereochemistry of a chiral center?

Accepted Answer

Solid wedge for the group pointing towards the observer, dashed wedge for the group pointing away

Question 10

A molecule is drawn with the following groups at a chiral center: OH (solid wedge), NH$$_2 ($$dashed wedge), and H (in the plane). Which group is below the plane?

Accepted Answer

NH$$_2$$

Question 11

If a student incorrectly uses a dashed wedge for a group that should be coming out of the page, what misconception might this reflect?

Accepted Answer

They believe dashed wedges indicate groups above the plane

Question 12

Which of the following statements is true regarding the use of wedges in skeletal formulas?

Accepted Answer

Dashed wedges indicate atoms going inside the page

Question 13

In a medical context, why is it important to correctly represent stereochemistry using solid and dashed wedges?

Accepted Answer

Because the three-dimensional arrangement can affect drug activity

Question 14

A molecule is drawn with a solid wedge for the OH group and a dashed wedge for the NH$$_2$$ group. If the observer is looking at the plane of the page, which group is pointing away from them?

Accepted Answer

NH$$_2$$ group

Question 15

Which of the following best describes the difference between a solid wedge and a dashed wedge in a skeletal formula?

Accepted Answer

Solid wedge: out of the page; Dashed wedge: into the page

Representing 3D Structure in Skeletal Formulas: Solid and Dashed Wedges

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