Fischer carbenes - structure - bonding - preparation - reactivity - NTA...

Fischer carbenes are the metal carbene complexes formed by electron-rich low oxidation state metals with singlet carbene organic ligands with a double bond between metal and carbene carbon. There is considerable electrophilic nature on carbene carbon due to weak pi back donation from metal to carbon.

http://www.adichemistry.com/

Pearson's Hard Soft Acid Base Theory - AdiChemistry

Hard and Soft Acids and Bases (HSAB) Theory is a qualitative concept introduced by Ralph Pearson to explain the stability of metal complexes and the mechanisms of their reactions. However it is possible to quantify this concept based on Klopman's FMO analysis using interactions between HOMO and LUMO.

According to this theory, the Lewis acids and bases can be further divided into hard or soft or border line types.

Hard Lewis acids are characterized by small ionic radii, high positive charge, strongly solvated, empty orbitals in the valence shell and with high energy LUMOs.

Soft Lewis acids are characterized by large ionic radii, low positive charge, completely filled atomic orbitals and with low energy LUMOs.

Hard Lewis bases are characterized by small ionic radii, strongly solvated, highly electronegative, weakly polarizable and with high energy HOMOs.

Soft Lewis bases are characterized by large ionic radii, intermediate electronegativity, highly polarizable and with low energy HOMOs.

The Border line Lewis acids and bases have intermediate properties.

Remember that it is not necessary for Lewis acid or base to possess all the properties to be classified as hard or soft or borderline.

In short, Hard acids and bases are small and non-polarizable, whereas Soft acids and bases are larger and more polarizable. 

More at:

https://www.adichemistry.com/inorganic/cochem/hsab/hard-soft-acid-base-theory.html

Wilkinson's catalyst Part-2 - mechanism - catalytic cycle - CSIR NET GAT...

Wilkinson's catalyst Part-2 - mechanism - catalytic cycle - CSIR NET GAT...

How to calculate mass of copper deposited at cathode? IIT JEE NEET

Elements and compounds

What is an element?

According to modern view, in simpler terms, an element can be defined as a substance made up of atoms of same atomic number.

For example, hydrogen gas, H₂ is an element since the atoms in it have the same atomic number i.e. 1. 

FIND MORE INFORMATION AT

http://www.adichemistry.com/general/chemistry-basics/elem/elements-compounds.html

A chemical compound consists of two are more different types of atoms. For example, water is a compound made up of hydrogen and oxygen. Its formula is H₂O i.e., there are two hydrogen atoms per every oxygen atom.

Electrolysis at adichemistry

Electrolysis involves dissociation (lysis) of an electrolyte by using a direct electric current.  In this process, electrical energy is used to carryout a non-spontaneous redox chemical reaction. 

The setup used to serve this purpose is known as electrolytic cell.

Read more at: 

http://www.adichemistry.com/physical/electrochemistry/electrolysis/electrolysis.html

http://www.adichemistry.com/index.html