Question

Give at "least" one example of chiral and achiral molecules. Also describe optical activity.

Answer 1

Answer:

I think so this is your answer.

Chirality is a property of asymmetry important in several branches of science. The word chirality is derived from the Greek (kheir), "hand," a familiar chiral object.

An object or a system is chiral if it is distinguishable from its mirror image; that is, it cannot be superposed onto it. Conversely, a mirror image of an achiral object, such as a sphere, cannot be distinguished from the object. A chiral object and its mirror image are called enantiomorphs (Greek, "opposite forms") or, when referring to molecules, enantiomers. A non-chiral object is called achiral (sometimes also amphichiral) and can be superposed on its mirror image.

The term was first used by Lord Kelvin in 1893 in the second Robert Boyle Lecture at the Oxford University Junior Scientific Club which was published in 1894:

Answer 2

Give at "least" one example of chiral and achiral molecules. Also describe optical activity.

Explanation:

Optical activity

It is an phenomenon of rotating the plane of polarised light by certain molecules .

The compounds that rotate the plane of polarised light are called "optically active ".

• If rotates towards right : Dextro-rotatory
• If rotates towards left : Laevo-rotatory

Conditions necessary to be optically active

Asymmetric carbon : No plane of symmetry

Chiral centre : this leads to non super imposable mirror images .

Example of chiral molecule

Br-CH(OH)CH₃

Example of achiral molecule

Br-CH(CH₃)-Br