18 Questions
When naming coordination compounds, what is the correct order for naming the cation, ligands, and central atom/ion?
Cation, ligands, central atom/ion
Which of the following ligands would typically end in -o according to IUPAC rules for naming coordination compounds?
CO
In the formula [NiCl2(PPh3)2], what is the correct IUPAC name for this coordination compound?
Dichloridobis(triphenylphosphine)nickel(II)
Which rule determines whether the metal in a complex ion is named as just the element or with the suffix -ate?
Whether the complex ion is a cation or anion
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?
Bis-, tris-, tetrakis-
How is the oxidation state of the metal in a coordination compound usually indicated in IUPAC naming?
By a Roman numeral in parenthesis after the central atom/ion name
What is the correct IUPAC name for [Cr(NH3)3(H2O)3]Cl3?
triamminetriaquachromium(III) chloride
Why does the oxidation number of chromium in [Cr(NH3)3(H2O)3]Cl3 need to be +3?
To match the charge of the complex ion.
What is the correct IUPAC name for [Co(H2NCH2CH2NH2)3]2(SO4)3?
tris(ethane-1,2–diamine)cobalt(III) sulphate
Why is the oxidation number of cobalt in [Co(H2NCH2CH2NH2)3]2(SO4)3 assigned as +3?
Due to the requirement for a net charge of +3 on the complex cation.
In coordination compounds, how are amine ligands typically named compared to aqua ligands?
Amine ligands are named first in alphabetical order before aqua ligands.
Why is it unnecessary to indicate the number of cations and anions in the name of an ionic compound?
To avoid redundancy as charges balance out in a formula unit.
What is the IUPAC name for [Pt(NH3)2Cl(NH2CH3)]Cl?
Diamminedichloridomethylamine platinum(II) chloride
Which of the following formulas corresponds to 'Potassium tetracyanidonickelate(II)'?
K2[Ni(CN)4]
What is the IUPAC name for [Co(NH3)4(H2O)Cl]Cl2?
Chlorotetraamminediaquacobalt(III) chloride
Which of the following is the formula for 'Dichloridobis(ethane-1,2-diamine)cobalt(III)'?
[CoCl2(en)2]+
What is the IUPAC name for [CoCl2(en)2]Cl?
Dichloridobis(ethane-1,2-diamine)cobalt(III) chloride
Which formula represents 'Potassium trioxalatoaluminate(III)'?
K3[Al(C2O4)3]
Learn the rules for naming coordination compounds, where the cation is named first, followed by the ligands in alphabetical order before the central atom/ion. Understand how to name anionic, neutral, and cationic ligands according to specific conventions.
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