Write the chemical formula of these coordination compounds formula name pentaaquabromomanganese(IV) bromide X 5 2 sodium triamminetrichlorotitanate(II) pentacarbonylchlorocopper(II) chloride
The Correct Answer and Explanation is:
Let’s break down the chemical formulas for each of these coordination compounds:
1. Pentaaquabromomanganese(IV) bromide
- Name analysis:
- Pentaaquabromo: The central metal ion is manganese (Mn) with a +4 oxidation state (Manganese(IV)). It is coordinated to five water molecules (aqua, H2O) and one bromide ion (Br⁻).
- Bromide: An additional bromide ion (Br⁻) is present as the counterion to balance the charge.
- Formula: The number of water molecules is 5, and there is 1 bromide ion as a ligand. Manganese(IV) will have a charge of +4. Each bromide ion has a charge of -1, and water molecules are neutral. To balance the charge, we need one more bromide ion outside the coordination sphere.
- Formula: [Mn(H2O)5Br]Br2
- The structure consists of a manganese(IV) center surrounded by five water molecules and one bromide ion in the coordination sphere, with two additional bromide ions as counterions.
2. Sodium triamminetrichlorotitanate(II)
- Name analysis:
- Sodium: The counterion is sodium (Na⁺).
- Triamminetrichlorotitanate(II): The central metal ion is titanium (Ti) in the +2 oxidation state (Titanium(II)), coordinated to three ammonia molecules (NH₃) and three chloride ions (Cl⁻).
- Formula: The titanium ion has a +2 charge, while the ammonia molecules are neutral and the chloride ions each carry a -1 charge. The overall complex will need sodium counterions to balance the charge.
- Formula: Na2[Ti(NH3)3Cl3]
- The sodium ions balance the +2 charge from the titanium and the overall negative charge from the chloride ligands.
3. Pentacarbonylchlorocopper(II) chloride
- Name analysis:
- Pentacarbonyl: The central metal is copper (Cu) in the +2 oxidation state, and it is coordinated to five carbonyl ligands (CO).
- Chloride: There is one chloride ion (Cl⁻) as a ligand.
- Chloride (again): A chloride ion is present as a counterion to balance the charges.
- Formula: The copper ion has a +2 charge, each carbonyl (CO) is neutral, and the chloride ligand (Cl⁻) in the coordination sphere is also neutral. The extra chloride ion is required as a counterion to balance the charge.
- Formula: [Cu(CO)5Cl]Cl
- The structure contains five carbonyl ligands attached to copper(II), with one additional chloride ion as the counterion.
Summary of Formulas:
- Pentaaquabromomanganese(IV) bromide: [Mn(H2O)5Br]Br2
- Sodium triamminetrichlorotitanate(II): Na2[Ti(NH3)3Cl3]
- Pentacarbonylchlorocopper(II) chloride: [Cu(CO)5Cl]Cl
These names and formulas follow the conventions for naming coordination compounds, where the ligands are named in alphabetical order (ignoring prefixes like “tri-” and “penta-“) and the oxidation state of the metal is indicated in parentheses. The counterions balance the charges on the coordination sphere.
