Consider octahedral [Co(aet)(H₂O)₂Br₂], where aet⁻ = H₂NCH₂CH₂S⁻ is an achiral, unsymmetrical N,S-chelate. Keep donor connectivity fixed and ignore ring conformations. Let g, s and p be the numbers of

Question

Consider octahedral [Co(aet)(H₂O)₂Br₂], where aet⁻ = H₂NCH₂CH₂S⁻ is an achiral, unsymmetrical N,S-chelate. Keep donor connectivity fixed and ignore ring conformations. Let g, s and p be the numbers of geometrical forms, stereoisomers and enantiomeric pairs. Which (g,s,p) is correct?

TestHub · Accepted Answer

Fix the unlike chelate ends at adjacent octahedral sites. The remaining two aqua and two bromido ligands give four geometrical arrangements. Two are chiral, each giving an enantiomeric pair; two are achiral. Hence g = 4, s = 2×2+2 = 6 and p = 2. Reflections identify geometrical forms, but not the members of an enantiomeric pair.

Chemistry - Coordination Chemistry Question with Solution | TestHub

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