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

Briefly explain acid-base titration, Q. Briefly explain acid-base titration...

Q. Briefly explain acid-base titration ? Ans. A valuable laboratory technique used by chemists is called an acid-base titration. A titration is a process in which the c

IInorganic chemistry, Why magnesium does not impart any colour to Bunsen fl...

Why magnesium does not impart any colour to Bunsen flame while calcium does

Estimate the osmotic pressure, A reverse osmosis membrane is used to desali...

A reverse osmosis membrane is used to desalinate high salinity groundwater. It is proposed to build an RO plant that will process about 500,000 liters/day of saline feed water cont

The number of quantum numbers required describe an electron, The number of ...

The number of quantum numbers required to describe an electron in an atom completely is: (1) 1          (2) 2         (3) 3     (4) 4 Ans: 4

Define why the glocose and fructose form the same osazone, Glucose and fruc...

Glucose and fructose are epimers so they are differ in their second carbon position and remaining is same so when they react with phenylhydrazeen they give same osazone

Dna nucleotides - biomolecules, DNA nucleotides Adenine ...

DNA nucleotides Adenine + Deoxy ribose sugar + Phosphate → Adenosine phosphate Guanine

Ionic radii, Ionic Radii   The experimentally calculated anion-cation...

Ionic Radii   The experimentally calculated anion-cation distances in highly ionic solids have to be interpreted on the assumption that each and every ion has a nearly fixed

The energy that opposes dissolution, The energy that opposes dissolution of...

The energy that opposes dissolution of a solvent is: (1) Hydration energy                     (2) Lattice energy    (3) Internal energy      (4) Bond energy Ans:  B

Plunck''s quantum theory of radiation, which of the following is not a char...

which of the following is not a characteristic of plunck''s quantum theory of radiation? A) Radiation are associated with energy B) A body can emit less or more than a quantum of e

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