CBSE Class 12 · 2001 · Delhi · Coordination CompoundsVery Short Answer

Write the IUPAC name for one of the isomers of [Co(NH

_{3}

)

_{5}

_{2}

]

^{2 +}

Answer: Pentaamminenitrito-N-cobalt(III) ion (its linkage isomer [Co(NH₃)₅(ONO)]²⁺ is pentaamminenitrito-O-cobalt(III) ion).

Solution

_{2}^{-}

is ambidentate — it can bind through N or through O, giving linkage isomers:
N-bonded [Co(NH

_{3}

)

_{5}

(NO

_{2}

)]

^{2 +}

: pentaamminenitrito-N-cobalt(III) ion.
O-bonded [Co(NH

_{3}

)

_{5}

(ONO)]

^{2 +}

: pentaamminenitrito-O-cobalt(III) ion.
Either name is a valid answer.

CBSE Class 12 Board · 2001 · Delhi · Subjective