NEET Chemistry NEET PYQ-Coordination Chemistry

  • question_answer
    According to IUPAC nomenclature sodium nitroprusside is named as:           [AIPMT 2003]

    A) sodium pentacyanonitrosyl ferrate (II)

    B) sodium pentacyanonitrosyl ferrate (III)

    C) sodium nitroferricyanide              

    D) sodium nitroferrocyanide

    Correct Answer: B

    Solution :

    [b] IUPAC name of sodium nitroprusside \[N{{a}_{2}}[Fe\,{{(CN)}_{5}}NO]\] is sodium pentacyanonitrosoyl ferrate (III) because in it NO is neutral ligand and the O.N. of Fe is III. Which is calculated as-
                \[2\times O.N.\,of\,Na+O.N.\,of\,Fe+5\times O.N.of\,CN\]\[+1\times O.N.\,of\,NO=0\]
                \[2\times (+1)+O.N.\,of\,Fe+5\times (-1)+1\times 0=0\]
                \[O.N.\,of\,Fe=5-2=+3\]


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