Chapter 4

What is the definition of a chiral molecule?

• A molecule that is superimposable on its mirror image

• A molecule that contains an inversion center

• A molecule that is not identical to its mirror image

• A molecule that has a plane of symmetry

What is the full specification of the three-dimensional positions of atoms in a molecule called?

• Conformation

• Configuration

• Composition

• Constitution

What is the relationship between two molecules that are mirror images and not superimposable on one another?

• Isomerism

• Enantiomerism

• Racemic mixture

• Homochiral mixture

What is a carbon bonded to four different groups called?

• Chirality center

• Inversion center

• Achiral center

• Symmetry center

What type of mixtures contain equal quantities of enantiomers and are optically inactive?

• Enantiomeric mixtures

• Homochiral mixtures

• Optically active mixtures

• Racemic mixtures

What is the full specification of the three-dimensional positions of atoms in a molecule ultimately confirmed by?

• Mass spectrometry

• NMR spectroscopy

• IR spectroscopy

• X-ray crystallography

What assigns a configuration R or S to a stereocenter based on a set of prioritization rules and a standard orientation?

• Cahn–Ingold–Prelog R,S notation

• Newman projection

• Fischer projection

• Haworth projection

What physical properties of pure enantiomers are identical?

• Boiling point, melting point, density

• Boiling point, refractive index, color

• Melting point, solubility, odor

• Density, viscosity, color

What is a chiral molecule?

• A molecule that is superimposable on its mirror image

• A molecule that is not superimposable on its mirror image

• A molecule that has a plane of symmetry

• A molecule that has an inversion center

What is a chirality center?

• A carbon bonded to four different groups

• A carbon bonded to three different groups

• A carbon bonded to two different groups

• A carbon bonded to five different groups