Coordination Compounds 2 Question 64
66. Write the IUPAC name of the compound $K _2\left[Cr(NO)(CN) _4\left(NH _3\right)\right]$. Spin magnetic moment of the complex $\mu=1.73 $ $BM$. Give the structure of anion.
$(2003,4 M)$
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Solution:
The spin-only magnetic moment $(\mu)$ of the complex is $1.73$ $ BM$. It indicates that the chromium ion has one unpaired electron. So, the ligand NO is unit positively charged. $K _2\left[Cr(NO)(CN) _4(NH _3)\right]$
potassium amminetetracyanonitrosoniumchromate (I)
$Cr(I)$ “under influence of strong ligand field”.
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