Why is it necessary to reduce the iron and then complex it with 1/10 phenanthroline?
1,10 phenanthroline (Phen) as a ligand stabilizes iron(II) more than iron(III) due to which it raises the reduction potential of iron redox couple. this can be explained as Iron(II) corresponds to 3d6 and iron(III) corresponds to 3d5 configurations and phenanthroline is a strong field π acceptor ligand .
Which colored complex is formed between 1/10 phenanthroline and ferrous metal ion is?
The complex of 1,10-phenanthroline with Fe(II) is called ferroin and has been widely used in titrimetric analysis as a redox indicator . 1,10-Phenanthroline forms with Fe(III) a blue complex (λmax 585 nm) which has been used for determining larger amounts of iron.
What is the structure of phenanthroline?
ortho-Phenanthroline
| PubChem CID | 84602 |
|---|---|
| Structure | Find Similar Structures |
| Molecular Formula | C36H24FeN6+2 |
| Synonyms | ortho-Phenanthroline Ferroin UNII-F5Q986P32R 14708-99-7 F5Q986P32R More… |
| Molecular Weight | 596.5 |
What is phenanthroline used for?
Phenanthroline (phen) is a heterocyclic organic compound. It is a white solid that is soluble in organic solvents. It is used as a ligand in coordination chemistry, forming strong complexes with most metal ions.
What is the chemical structure of 1/10-phenanthroline?
C12H8N2
Phenanthroline/Formula
What type of ligand is 1/10-phenanthroline?
chelating bidentate ligand
1,10-Phenanthroline (phen) is a classic chelating bidentate ligand for transition metal ions that has played an important role in the development of coordination chemistry [1], [2], [3] and still continues to be of considerable interest as versatile starting material for organic, inorganic and supramolecular chemistry.
What is the charge of 1/10-phenanthroline?
1,10-phenanthroline is a phenanthroline. It has a role as an EC 3.4. 19.3 (pyroglutamyl-peptidase I) inhibitor and an EC 2.7….4.1. 11H NMR Spectra.
| Source of Spectrum | Sigma-Aldrich Co. LLC. |
|---|---|
| Source of Sample | Sigma-Aldrich Co. LLC. |
| Catalog Number | 131377 |
Is 1,10-phenanthroline a bridging ligand?
The polydentate ligand L has been prepared by treating 1,10-phenanthroline-2,9-dicarbaldehyde with hydroxylamine. Dissociation of the oxime group to an oximate, which acts as an anionic bridging ligand, was observed in the case of metallation with zinc acetate thus giving rise to dimers and/or polymers.
What is the function of the phenanthroline solution?
Related phen ligands
| ligand | pKa | comment/alt. name |
|---|---|---|
| 4,7-dimethyl-1,10-phenanthroline | 5.97 | |
| 4,7-diphenyl-1,10-phenanthroline | unknown | bathophenanthroline |
| 5,6-dimethyl-1,10-phenanthroline | 5.20 | |
| 3,4,7,8-tetramethylphenanthroline | 6.31 | 3,4,7,8-Me4phen |
What is the function of 1 10 phenanthroline?
1,10-Phenanthroline forms a stable complex with Fe (II) ion called ferroin, which is used as an indicator in Fe (II) salt titrations. Ferroin is also used in the determination of other metals, such as nickel, ruthenium, and silver.
What happens when ferrous iron reacts with phenanthroline?
Chemistry Ferrous iron reacts with 1,10-phenanthroline to form an orange colored complex in direct proportion to the ferrous iron concentration. Soluble iron consists primarily of ferrous iron, but can also contain a small portion of ferric iron.
What is the rate limiting step in the complexation of phen?
Increasing the acid concentration retarded the reaction, and the reaction rate showed a positive salt effect. The rate-limiting step involved the complexation of the phen or protonated phen with [Fe (phen) 2] 2+ complex ion, leading to formation of [Fe (phen) 3] 2+ ion.
