i) Write the IUPAC name of the following complex: [Cr(NH$_3$)$_2$Cl$_2$(en)]Cl (en = ethylenediamine). ii) Write the formula of the complex pentaamminenitrito-O-cobalt(III).

CBSE Class 12 · 2015 · Delhi · Coordination CompoundsShort Answer

i) Write the IUPAC name of the following complex: [Cr(NH

_{3}

)

_{2}

_{2}

(en)]Cl (en = ethylenediamine).
ii) Write the formula of the complex pentaamminenitrito-O-cobalt(III).

Answer: (i) Diamminedichlorido(ethane-1,2-diamine)chromium(III) chloride. (ii) [Co(NH₃)₅(ONO)]²⁺.

Solution

(i) Alphabetical: ammine, chlorido, ethane-1,2-diamine; 2(−1) + x = +1 ⇒ Cr(III).
\textbf{Diamminedichlorido(ethane-1,2-diamine)chromium(III) chloride}
(ii) Nitrito-O = O-bonded NO

_{2}^{-}

[Co (N H_{3})_{5} (ONO)]^{2 +}

CBSE Class 12 Board · 2015 · Delhi · Subjective

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