Examples of sigma (σ) – donors:
Related Questions;
Sunday, November 29, 2020
What are pi-acceptors ligands give the examples?
Examples of pi-acceptors ligands given as;
Related Questions;
(1) What type of ligands are known ?
(3) What is the common formula of “Prussian blue is” and “Turn bull's blue”?
(4) What is denticity of NO and NO+ ligands ?
(5) Why all the tetrahedral Complexes are high spin Complexes?
(6) Why Fe(CO)5 is colourless while Fe(bipy)(CO)3 is intensely purple in colour ?
(7) Why [Mn(H2O)6]+2 is colourless although in which Mn+2 ion had five unpaired electrons ?
(8) Why [FeF6]3– is colourless whereas [CoF6]3– is coloured?
(9) Why [Ni(CN)4]-2 is colourless while [Ni(H2O)4]-2 is colour although both have +2 oxidation state and 3d8 configuration ?
What are pi-donors ligands give the examples?
Ligands such as OR−, F−, and Cl− are π donors as a result of the lone pairs that are left after one lone pair has formed the M−L σ bond. Instead of stabilizing the dπ electrons of a d6 ion as does a π acceptor, these electrons are now destabilized by what is effectively a repulsion between two filled orbitals.
Examples of pi-donor ligands given as;
Related Questions;
(1) What type of ligands are known ?
(2) What is the common formula of “Prussian blue is” and “Turn bull's
blue”?
(3) What is denticity of NO and NO+ ligands ?
(5)Which of the Complex of the following pairs has the highest value of CFSE?
(6) Colour of Complexes due to charge transfer:
(7) Why violet colour of [Ti(H2O)6]Cl3 disapear (colourless) on heating heating ?
(9) Why [FeF6]3– is colourless whereas [CoF6]3– is coloured ?
(10) Why Fe(CO)5 is
colourless while Fe(bipy)(CO)3 is intensely purple in colour ?
Why all the
tetrahedral Complexes are high spin Complexes ?
What type of ligands are known ?
Many ligands are a combination of donor types, but the “pure” donor diagrams can be considered as;
Related Questions;
(1) What are pi-donors ligands give the examples?
Saturday, November 28, 2020
What are the inverse spinel structures?
INVERSE SPINEL STRUCTURE (Fe3O4-Magnetite):
In Fe3O4, Fe+2 and Fe+3 ions are present in the ratio 2:1. it may be considered as having composition FeO.Fe2O3. In Fe3O4 Oxide arranged in ccp. Fe+2 ions occupy octahedral voids while Fe+3 ions are equally distributed between octahedral and tetrahedral voids
MgFe2O4 also has structure similar to magnetite. In this Mg+2 ions are present in place of Fe+2 ion in Fe3O4. Magnetite has inverse spinet structure.
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