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Indian Forest Service (Mains)

Chemistry optional

  • 2 papers
  • 200 marks each
  • 3 h per paper

Paper I covers physical and inorganic chemistry.

Indian Forest Service (Mains), Chemistry optional · 2023 · Paper I

Q5(d). All stereoisomers of the nickel glycinate complex

Question

Draw all the possible isomers (diastereoisomers + enantiomers) for [Ni(H₂NCH₂COO)₂(H₂O)₂].

Answer in brief

There are eight stereoisomers: two achiral trans-water arrangements and three cis-water arrangements, each forming an enantiomeric pair.

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Topic notes: Werner theory, isomerism, IUPAC names and valence bond theory of complexes, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversgeometrical isomerismoptical isomerismglycinate complex[M(AB)₂a₂] isomersoctahedral stereoisomers

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