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

Ionic bonds, ionic bonds are usually formed by combination of elements with...

ionic bonds are usually formed by combination of elements with which type of ionisation potential or electron affinity

Equilibrium equations, 2NO N2 + O2 has a Keq of 85 Keq = [N2}{02} ...

2NO N2 + O2 has a Keq of 85 Keq = [N2}{02} ------- [NO]2 at equilibrium, would have more reactants or products

Calculation of the power generated by a wind turbine, Calculation of the po...

Calculation of the power generated by a wind turbine: A wind turbine power curve is represented in a simplified manner by: C p is the conversion rate of the turbine:

Atoms and molecules, name the smallest element that has all properties of a...

name the smallest element that has all properties of an element

Why boron is electron-deficient, Why boron is electron-deficient (a) E...

Why boron is electron-deficient (a) Every atom has an octet; thus, this is not an electron-deficient compound. (b) The boron is electron-deficient because it has a sextet o

The compound in which cation is isoelectronic with anion is, The compound i...

The compound in which cation is isoelectronic with anion is : (1) NaCl                (2) CsF       (3) NaI                               (4) K 2 S Ans: K 2 S

Latice energy, Factors effecting lattice energy of ionic compound

Factors effecting lattice energy of ionic compound

DENSITY, WHY DENSITY OF POTASIUM IS LOW THAN SODIUM.

WHY DENSITY OF POTASIUM IS LOW THAN SODIUM.

Lowest energy to highest, Change the given molecule to a Newman Projection ...

Change the given molecule to a Newman Projection with the C2 carbon at the front and looking down the C2-C3 bonddraw all eclipsed and staggered conformations.  Identify the interac

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