MCQ
Choose the correct option regarding the following complex compound which  follows $(F)$ and does not follow $(NF)$ the Sidgwick $EAN$ rule :
 
$(I)\, [(Ph_3P)_2PdCl_2PdCl_2]$         $(II)\,[NiBrCl(en)]$
$(III)\, Na_4 [Fe(CN)_5 NOS]$             $(IV)\, Cr(CO)_3(NO)_2$
 
$(I)\,-\,(II)\,-\,,(III)\,-\,(IV)$
  • A
    $NF\,-\,NF\,-\,NF\,-\,NF$
  • $F\,-\,F\,-\,NF\,-\,F$
  • C
    $NF\,-\,NF\,-\,F\,-\,F$
  • D
    $NF\,-\,NF\,-\,F\,-\,NF$

Answer

Correct option: B.
$F\,-\,F\,-\,NF\,-\,F$
b
The oxidation state of central atom $(P t)$ is calculated as

Let the oxidation state of $P t=x$, then

$(x \times 1)+3 \times(0)+(1 \times-1)+(1 \times-1)+(1 \times-1)=+1$

$x-3=+1$

$x=+4$

Thus, the $I U P A C$ name of the complex $\left[P t(N H)_{3} B r\left(N O_{2}\right) C l\right] C l$ is triamine bromidochloridonitro platinum $(IV)$ chloride as the names of the different ligands are arranged alphabetically.

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