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GUJCET · Chemistry · Coordination Compounds
What is the true IUPAC name of \(\mathrm{Hg}\left[\mathrm{Co}(\mathrm{SCN})_4\right]\) coordination compound?
- A Mercury (I) tetrathiocyanato - S - cobaltate (III)
- B Mercury (II) tetrathiocyanato - N - cobaltate (II)
- C Mercury (I) tetrathiocyanato - S - cobalt (III)
- D Mercury (I) tetrathiocyanato - N - cobalt (III)
Answer & Solution
Correct Answer
(A) Mercury (I) tetrathiocyanato - S - cobaltate (III)
Step-by-step Solution
Detailed explanation
Oxidation state of \(\mathrm{Co}\): Let \(\mathrm{Hg}\) be \(\mathrm{Hg}^{+}\) (Mercury (I)). Then, the complex anion \(\left[\mathrm{Co}(\mathrm{SCN})_4\right]\) has a charge of \(-1\). For \(\left[\mathrm{Co}(\mathrm{SCN})_4\right]^{-}\): \(\mathrm{Co} + 4 \times (-1) = -1 \Rightarrow \mathrm{Co} = +3\).
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