Naming Coordination Compounds Rules
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Questions and Answers

When naming coordination compounds, what is the correct order for naming the cation, ligands, and central atom/ion?

  • Ligands, cation, central atom/ion
  • Central atom/ion, cation, ligands
  • Cation, central atom/ion, ligands
  • Cation, ligands, central atom/ion (correct)

    • Which of the following ligands would typically end in -o according to IUPAC rules for naming coordination compounds?

  • NH3
  • H2O
  • NO
  • CO (correct)

    • In the formula [NiCl2(PPh3)2], what is the correct IUPAC name for this coordination compound?

  • Nickel chloride phosphine
  • Dichloridobis(triphenylphosphine)nickel(II) (correct)
  • Nickel dichloride diphenylphosphide
  • Chloridodiphosphonickel(II)

    • Which rule determines whether the metal in a complex ion is named as just the element or with the suffix -ate?

    <p>Whether the complex ion is a cation or anion</p> Signup and view all the answers

    What prefixes are used to indicate the number of individual ligands in a coordination entity when numerical prefixes are already present in the ligand names?

    <p>Bis-, tris-, tetrakis-</p> Signup and view all the answers

    How is the oxidation state of the metal in a coordination compound usually indicated in IUPAC naming?

    <p>By a Roman numeral in parenthesis after the central atom/ion name</p> Signup and view all the answers

    What is the correct IUPAC name for [Cr(NH3)3(H2O)3]Cl3?

    <p>triamminetriaquachromium(III) chloride</p> Signup and view all the answers

    Why does the oxidation number of chromium in [Cr(NH3)3(H2O)3]Cl3 need to be +3?

    <p>To match the charge of the complex ion.</p> Signup and view all the answers

    What is the correct IUPAC name for [Co(H2NCH2CH2NH2)3]2(SO4)3?

    <p>tris(ethane-1,2–diamine)cobalt(III) sulphate</p> Signup and view all the answers

    Why is the oxidation number of cobalt in [Co(H2NCH2CH2NH2)3]2(SO4)3 assigned as +3?

    <p>Due to the requirement for a net charge of +3 on the complex cation.</p> Signup and view all the answers

    In coordination compounds, how are amine ligands typically named compared to aqua ligands?

    <p>Amine ligands are named first in alphabetical order before aqua ligands.</p> Signup and view all the answers

    Why is it unnecessary to indicate the number of cations and anions in the name of an ionic compound?

    <p>To avoid redundancy as charges balance out in a formula unit.</p> Signup and view all the answers

    What is the IUPAC name for [Pt(NH3)2Cl(NH2CH3)]Cl?

    <p>Diamminedichloridomethylamine platinum(II) chloride</p> Signup and view all the answers

    Which of the following formulas corresponds to 'Potassium tetracyanidonickelate(II)'?

    <p>K2[Ni(CN)4]</p> Signup and view all the answers

    What is the IUPAC name for [Co(NH3)4(H2O)Cl]Cl2?

    <p>Chlorotetraamminediaquacobalt(III) chloride</p> Signup and view all the answers

    Which of the following is the formula for 'Dichloridobis(ethane-1,2-diamine)cobalt(III)'?

    <p>[CoCl2(en)2]+</p> Signup and view all the answers

    What is the IUPAC name for [CoCl2(en)2]Cl?

    <p>Dichloridobis(ethane-1,2-diamine)cobalt(III) chloride</p> Signup and view all the answers

    Which formula represents 'Potassium trioxalatoaluminate(III)'?

    <p>K3[Al(C2O4)3]</p> Signup and view all the answers

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