how does a formula of Iron(III) and ethylenediamine, assuming a coordination number of 6 look and what is it's name and written transition metal formula
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To determine the formula and name of the compound formed between Iron(III) and ethylenediamine, we need to know the formula of ethylenediamine.
The formula for ethylenediamine is (NH2CH2CH2NH2).
Since Iron(III) has a coordination number of 6, it can form six coordination bonds with ethylenediamine. Each coordination bond involves the donation of a lone pair of electrons from each nitrogen atom in ethylenediamine to the central Iron(III) ion.
To assemble the formula, we start by writing the symbol for Iron(III), which is Fe(III). Since it has a coordination number of 6, there will be six ethylenediamine ligands attached to it.
The final formula of the compound is Fe(III)(NH2CH2CH2NH2)6
The name of the compound can be determined using the systematic naming system for coordination complexes. Since ethylenediamine acts as a ligand, we use the prefix "hexa-" to indicate the presence of six ligands.
Therefore, the name of the compound is hexakis(ethylenediamine)iron(III) chloride.
The written transition metal formula for this compound can be written as [Fe(NH2CH2CH2NH2)6]3+.
To determine the formula, name, and written transition metal formula for a complex involving Iron(III) and ethylenediamine with a coordination number of 6, you will need to follow these steps:
1. Determine the charge on the central metal ion: Iron(III) indicates that the iron ion has a +3 charge.
2. Determine the charge on the ligand: Ethylenediamine (en) is a bidentate ligand, meaning it can form two bonds with the metal ion. Each nitrogen atom in ethylenediamine has a lone pair of electrons that can be donated to form a coordinate bond with the metal ion. The resulting charge of the ethylenediamine ligand is neutral.
3. Calculate the total charge of the complex: Since the ethylenediamine ligand is neutral, the total charge will be equal to the charge on the central metal ion, which is +3 for Iron(III).
4. Determine the number of ligands needed to satisfy the coordination number: A coordination number of 6 suggests that the central metal ion will be surrounded by six ligands.
5. Write the formula of the complex: With the information above, we can determine that the formula of the complex is [Fe(en)₃]³⁺. This indicates that there are three ethylenediamine ligands bonded to the central Fe³⁺ ion.
6. Name the complex: The name of the complex follows the pattern: [metal ion + ligand(s)] + Roman numeral for the metal's charge. In this case, the complex is called iron(III)triammine ion.
7. Write the written transition metal formula: The written transition metal formula provides a chemical shorthand using element symbols and oxidation numbers. For the iron(III)triammine complex, the written transition metal formula is [Fe(en)₃]³⁺.
In summary, the formula of the Iron(III) and ethylenediamine complex with a coordination number of 6 is [Fe(en)₃]³⁺. The complex is named iron(III)triammine ion, and the written transition metal formula is [Fe(en)₃]³⁺.