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

Assignment, Applications of radiometric titration in pharmaceutical industr...

Applications of radiometric titration in pharmaceutical industry #

Cengage online, There are three assignments due on the 25th I can''t give t...

There are three assignments due on the 25th I can''t give the questions because it is online

Apply kinetic molecular theory to solutions, Q. Can we apply Kinetic Molecu...

Q. Can we apply Kinetic Molecular Theory to Solutions? Ans. The Kinetic Molecular Theory can also be applied to solutions. A solution is a distribution of one or more sub

Periodic, where is the asterisk located

where is the asterisk located

Volume of diatomic gas, Volume of diatomic gas is less than the monatomic g...

Volume of diatomic gas is less than the monatomic gas , although diatomic gas has 2 moles ( 2 times atomes) than monoatomic gas ?? Ans) The answer is derived by avogadros law

Noble gases, NOBEL GASES With their closed-shell electron design the nob...

NOBEL GASES With their closed-shell electron design the noble gas elements of group 18 were long regarded as chemically inert. However, in 1962 Bartlett pinpoint that the ioniza

Explain about optical rotation, Optical rotation (optical activity) is the ...

Optical rotation (optical activity) is the turning of the plane of linearly polarized light about the direction of motion as the light travels by certain materials. It happens in s

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