Table of Contents
What is the color of the complex when iron II reacts with 1/10-phenanthroline?
orange-red
1,10-Phenanthroline (phen, formula 26.1 ) and 2,2′-bipyridyl (formula 26.2) are organic bases with very similar chemical properties. Both reagents react rapidly with Fe2 + ions in weakly acid media to give orange-red or pink complexes, respectively, which are a basis for determining Fe(II) [27,28].
What is the name of the complex formed between Fe II and O phenanthroline?
The commercially available 1,10-phenanthroline (C 12 H 8 N 2 ) is added into the solution as an iron probe which forms a strong reddish-orange colored Fe(phen) 3 2+ complex, also known as ferroin, through chemical bonding with Fe 2+ [41, 42].
What is the molar ratio of Fe II ion to the Fe II )- phenanthroline complex ion?
= 1:2
This method is based on the fluorescence quenching of phenanthroline due to the formation of complex Fe(II)-phen. In pH = 4.6-7.1 buffer solution, Fe(II) and phen react to form a red complex. Its composition is established by method of continuous variations and molar-ratio as Fe (II): phen = 1:2.
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 structure of 1/10-phenanthroline?
C12H8N21,10-Phenanthroline / Formula
How do you find Fe Spectrophotometrically?
Iron +II is reacted with o-phenanthroline to form a coloured complex ion. The intensity of the coloured species is measured using a Spectronic 301 spectrophotometer. A calibration curve (absorbance versus concentration) is constructed for iron +II and the concentration of the unknown iron sample is determined.
Is 1,10-phenanthroline monodentate or bidentate?
… 1-5 1,10-Phenanthrolein (phen) is an aromatic heterocyclic bidentate chelating ligand that bonds to metal ions using the lone pair of electrons on the nitrogen atoms resulting in a fivemembered ring structure.
What is iron phenanthroline for?
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 is the function of 1/10-phenanthroline?
What is phenanthroline method?
Summary. A rapid, accurate method for the determination of iron using hydroxylamine hydrochloride, sodium acetate buffer, and 1,10-phenanthroline is described. The ash is taken up with hydrochloric acid (1 + 1) and heated for 5 minutes. No interference from pyrophosphates, copper and nickel was observed.
What is the 1/10-phenanthroline method?
Is phenanthroline a bidentate ligand?
Spectral data showed that the 1,10-phenanthroline act as neutral bidentate ligand coordinating to the metal ion through two nitrogen donor atoms and Schiff bases acts as monobasic bidentate coordinating through NO donor atoms. All Ni(II) complexes appear to have an octahedral geometry.