CBSE Class 12 · 2006 · All India Compartment · Coordination CompoundsShort Answer

Draw the structures of the following:
i) cis-dichloridotetracyanidochromate(III)
ii) pentaamminenitrito-N-cobalt(III)

Solution

(i) \textit{cis}-[Cr(CN)

_{4}

_{2}

]

^{3 -}

: octahedral Cr(III); the two Cl

^{-}

occupy adjacent (90°) vertices, the four CN

^{-}

the remaining four — drawn with Cl at two neighbouring corners of the octahedron.
(ii) [Co(NH

_{3}

)

_{5}

(NO

_{2}

)]

^{2 +}

: octahedral Co(III); five vertices carry NH

_{3}

and the sixth carries nitrite bonded through nitrogen (Co–NO

_{2}

CBSE Class 12 Board · 2006 · All India Compartment · Subjective