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

Sulpha drugs - drugs and medicines, Sulpha drugs: These are synthetic c...

Sulpha drugs: These are synthetic chemotherapeutic agents who consist of sulphonamide, -SO 2 NH 2 set in their organization. These were the firstly effective chemotherapeutic

Mole fraction, The mole fraction of solute and solvent is equal to

The mole fraction of solute and solvent is equal to

Methane emissions from landfills, From the EPA the current generation of m...

From the EPA the current generation of methane from landfills in the USA is 12.7 MM tons per year (2009). a. Using the Global Warming Potential of the methane at 20 years, 100

The transition elements high enthalpies of atomization, (i) How would you a...

(i) How would you account for the following: (a) The transition elements exhibit high enthalpies of atomization. (b) The 4d and 5d series of the transition metals have more

Methods for manufacture of soaps, Methods for Manufacture of Soaps Ther...

Methods for Manufacture of Soaps There are the following three methods for manufacture of soaps: (a) The cold process (b) The hot process (c) Modern process

What is gluten, Q. What is gluten? What is gluten? Certainly you know t...

Q. What is gluten? What is gluten? Certainly you know that gluten is the protein found in wheat. Gluten is more or less made up of equal parts of gliadin and glutenin. Look up

Bond-line notation of organic compounds, Bond-line Notation of organic comp...

Bond-line Notation of organic compounds Occasionally, the bonds in between carbon atoms are denoted by lines. For instance, n -hexane has a continuous chain of six carbon atom

Carbonyl compounds, which compound has sharp, unpleasant and pungent smell?...

which compound has sharp, unpleasant and pungent smell?

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