Optical isomers (d and l) of [Co(en)₃]³⁺[Co(en)₃]³⁺ के ध्रुवण समावयव (d और l)Optical isomers (d and l) of [Co(en)₃]³⁺

NCERT Fig 5.6 · Class 12 Chemistry · Chapter 5 · interactive diagram

Parts and what they mean

• Co(III) (Co(III)) — Three en ligands × 2 donor N = coordination number 6.
• N donor of en (en का N दाता) — Each pair of N joined by an arc belongs to one en.
• en chelate ring (en कीलेट वलय) — Three chelate rings wrap the metal like the blades of a propeller.
• Mirror plane (दर्पण तल) — The right structure is the exact reflection of the left one.
• Δ form (Δ रूप) — Chelates form a right-handed helix (IUPAC symbol Δ). Whether this one is d or l is found experimentally with a polarimeter.
• Λ form (Λ रूप) — Left-handed helix. Δ and Λ are enantiomers: same formula, same bonds, non-superimposable mirror images; they rotate plane-polarised light equally but in opposite directions.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 5.6. Report a mistake