Complexation behaviour of the f-block, Chemistry

Assignment Help:

Q. Complexation Behaviour of the f-block?

Ions of actinide and lanthanide elements have a strong tendency to form complexes with a variety of oxygen and nitrogen donor ligands. Perhaps, because of their comparatively higher charge to size ratio, the actinide ions have a greater tendency to form complexes than the lanthanides. Also, because of the existence of a large number of oxidation states, the complexation behaviour of actinides is more varied. The lanthanide and actinide ions form the most stable complexes with chelating ligands such as oxalic acid, tartaric acid, citric acid, nitric acid, ethylenediamine tetraacetic acid (EDTA) and 0-diketones. In these complexes the metal ions have very high coordination numbers. For case, the coordination number of the metal ion in [Th(acac)4]. [Ce(N03)4.(OPPh3)2] and  [Ce(N03)6]2- is 8, 10, 12, respectively. In these complexes, the acetyl acetonate (acac) and the nitrate ligands are operating as bidentate ligands occupying two coordination sites around the metal ion. These metal ions form water soluble complexes with citric acid, tartaric acid and EDTA. The formation of water soluble complexes with these ligands facilitates separation of the metal ions by ion exchange chromatography.


Related Discussions:- Complexation behaviour of the f-block

Complexometric titrations - types of titrations, Complexometric Titrations ...

Complexometric Titrations - Types of titrations A titration, where an dissolved complex is formed at the equivalence point, is termed as complexometric titration. These types

What are the various types of point defects, What are the various types of ...

What are the various types of point defects? How are they caused?   (i) Vacancies: This refers to a missing atom or a vacant atomic site because of absence of a matri

Phase equilibria, Melting and freezing points: When a pure solid substa...

Melting and freezing points: When a pure solid substance is heated through its melting point (melting temperature), the solid changes to a liquid. At the melting point equilibr

Organic chemistry, how will you prepare iodoform in labarotary?

how will you prepare iodoform in labarotary?

Show the colorimetric analysis, Q. Show the Colorimetric analysis? Colo...

Q. Show the Colorimetric analysis? Colorimetric analysis depends on the variation of the colour with the change in concentration of the compound. Usually, absorption of light i

Alcoholic acidity calculation, Why alcoholic acidity express in terms of su...

Why alcoholic acidity express in terms of sulphuric acid

Electroanalytical technique, Electroanalytical technique: An electroan...

Electroanalytical technique: An electroanalytical technique is based on the measurement of one or more electrical quantities and their magnitudes could be correlated with the

Preparation of alkanes, preparation of ethane with suitable equations (hydr...

preparation of ethane with suitable equations (hydrogenation

Organic, Distinguish between acetaldehyde and ketone

Distinguish between acetaldehyde and ketone

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd