A molecule of the type shown is discussed in greater detail in Section 6.5.1. Although it contains at least one atom with four different groups attached, why is it not a chiral molecule?

검증된 단계별 안내

Step 1: Identify the atom in the molecule that has four different groups attached. In this case, the carbon atom bonded to a hydrogen (H), bromine (Br), and two other groups is the candidate for chirality.

Step 2: Analyze the symmetry of the molecule. A molecule is chiral if it lacks an internal plane of symmetry and cannot be superimposed on its mirror image.

Step 3: Observe the structure of the molecule. The two bromine atoms are positioned symmetrically on opposite sides of the ring, creating an internal plane of symmetry.

Step 4: Determine the impact of the symmetry on chirality. The presence of the internal plane of symmetry means that the molecule is achiral, even though it contains a carbon atom with four different groups attached.

Step 5: Conclude that the molecule is not chiral because the symmetry of the molecule allows it to be superimposed on its mirror image, negating chirality.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Chirality

Chirality refers to the geometric property of a molecule that makes it non-superimposable on its mirror image. A chiral molecule typically has a carbon atom bonded to four different substituents, resulting in two distinct enantiomers. Understanding chirality is crucial for determining the optical activity of compounds and their interactions in biological systems.

Symmetry

Symmetry in molecules can significantly influence their chirality. A molecule may have a chiral center but can still be achiral if it possesses an internal plane of symmetry. This means that despite having four different groups attached to a central atom, the overall structure can be symmetrical, leading to a lack of chirality.

Stereoisomerism

Stereoisomerism is a form of isomerism where molecules have the same molecular formula and connectivity but differ in the spatial arrangement of atoms. This concept is essential for understanding how different arrangements can lead to chiral or achiral molecules. In the context of the question, recognizing the types of stereoisomers helps clarify why a molecule may not exhibit chirality despite having a chiral center.