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

Explain pseudo first order reaction, Give an example of a pseudo first orde...

Give an example of a pseudo first order reaction. Write the IUPAC name of the following: (CH 3 ) 2 C=CHCOCH 3

What do you understand by miller indices of a crystal plane, What do you un...

What do you understand by Miller indices of a crystal plane? Miller Indices are a symbolic vector representation for the orientation of an atomic plane in a crystal lattice an

Gattermann-koch aldehyde synthesis, Gattermann-koch aldehyde synthesis ...

Gattermann-koch aldehyde synthesis Benzene is transformed into benzaldehyde by passing a mixture of carbon monoxide and HCl gas within high pressure into the ether solution of

Effect of modification on mechanical properties of polymer, What are three ...

What are three modifications to a polymer that can make it transparent? How will these modifications affect the mechanical properties of the polymer?

The magnetic quantum number for an electron, The magnetic quantum number fo...

The magnetic quantum number for an electron when the value of principal quantum number is 2 can have: (1)3 values (2) values (3)9 values (4)6 values Ans: 3 values

Saturation of magnesium nitrate, How can I figure out when a solution of ma...

How can I figure out when a solution of magnesium nitrate will be saturated in terms of its conductivity at room temperature?

Phy chem, describe the various types of velocities?

describe the various types of velocities?

Physical properties of formic acid, Physical properties of Formic Acid ...

Physical properties of Formic Acid (a) Formic Acid is a pungent smelling and colourless liquid. (b) Formic Acid melts at 8.4° C and boils at 100.5° C . (c) Formic Acid i

Types of chromatography- purification of organic compounds, Types of chroma...

Types of chromatography- Purification of organic compounds Depending on the nature of the stationary and the mobile phases, the different types of chromatographic methods gener

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