Coordination Compounds 1 Question 4

4. The one that will show optical activity is (en = ethane-$1, 2$-diamine) (a)

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Answer:

Correct Answer: 4. (c)

Solution:

  1. Optical activity is the ability of a chiral molecule to rotate the plane of polarised light, measured by a polarimeter. A chiral molecule does not have any plane of symmetry. If a molecule possess any plane of symmetry, then it is an achiral molecule. Given options (a), (b) and (d) possess plane of symmetry.

<img src=“https://temp-public-img-folder.s3.amazonaws.com/sathee.prutor.images/sathee_image/cropped_2024_01_16_b4fdca9f34924034e8d8g-259_jpg_height_341_width_312_top_left_y_547_top_left_x_1233.jpg"width="200">

(b)

<img src=“https://temp-public-img-folder.s3.amazonaws.com/sathee.prutor.images/sathee_image/cropped_2024_01_16_b4fdca9f34924034e8d8g-259_jpg_height_324_width_332_top_left_y_544_top_left_x_1576.jpg"width="200">

(d)

<img src=“https://temp-public-img-folder.s3.amazonaws.com/sathee.prutor.images/sathee_image/cropped_2024_01_16_b4fdca9f34924034e8d8g-259_jpg_height_325_width_270_top_left_y_888_top_left_x_1415.jpg"width="200">

(a)

Only molecule (c) does not possess any plane of symmetry. Hence, it is a chiral molecule and shows optical activity.