CBSE Class 12 · 2006 · Delhi Compartment · Coordination CompoundsShort Answer

Write the name (IUPAC norms) and draw the possible optical isomers of [CrCl

_{2}

(en)(NH

_{3}

)

_{2}

]

^{+}

Solution

Name: \textbf{diamminedichlorido(ethane-1,2-diamine)chromium(III) ion}.
With the two Cl

^{-}

(and the two NH

_{3}

) cis, the octahedral cation has no plane of symmetry: it exists as two optical isomers — mirror images that cannot be superimposed (d- and l-forms), drawn as the two enantiomeric octahedra related by a mirror plane.

CBSE Class 12 Board · 2006 · Delhi Compartment · Subjective

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