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

Polyhydroxy butyrate or phb, Polyhydroxy butyrate (PHB) Polyhydroxy but...

Polyhydroxy butyrate (PHB) Polyhydroxy butyrate or PHB is acquired from hydroxy butyric acid (3-hydroxy butanoic acid)

Percentage concentration, percentage concentration of 18-k gold bracelet, 1...

percentage concentration of 18-k gold bracelet, 150 grams

Determination of acid insoluble ash of flour sample., I want to know how to...

I want to know how to determine the acid insoluble ash of a flour sample with principle,procedure as well as calculations.

Spin-only magnetic moment, The tris(monothiocarbamato)iron(III)complex show...

The tris(monothiocarbamato)iron(III)complex shown to the right undergoes conversion from low to high spin state  with an increase in temperature.  This can be monitored by measurin

organic chemistry, Synthesis of di and tri substituted benzene

Synthesis of di and tri substituted benzenes

Relative abundance, In naturally occuring neon, the fracional abundance of ...

In naturally occuring neon, the fracional abundance of various isotopes is as follows: 20Ne =0.9051; 21Ne = 0.0027; 22Ne = 0.0922. What is the atomic mass of neon?

Calculate the standard cell potential of the mercury cell, The cell diagram...

The cell diagram of a mercury cell can be written Zn(s) | ZnO (s) NaOH (aq) HgO (s) HgO (I) (a) Write the electrode reactions and cell reaction with electron number z = 2.

What is alkane, Alkane is a organic compound which having single bond betwe...

Alkane is a organic compound which having single bond between c-c i.e alkane is a saturated compound.

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