acceptor ligands -p (pi), Chemistry

 

Most ligands have a nonbonding electron pair that may react as a donor to empty orbitals on the metal atom. In ligands known as π acids or π acceptors a donor-acceptor communication also happens in the reverse direction. If a ligand has empty orbitals of π type symmetry with respect to the bond axis these may react as acceptors for electrons in filled metal orbitals of the correct symmetry. That is known as back donation. The commonest and simplest π acid ligand is carbon monoxide CO. This reacts as a donor in the normal way, through the acquired lone-pair orbital centered on carbon (the 3σ MO). The π antibonding orbital may also interact with filled d orbitals to produce the π-acceptor interaction. The combination of π-acceptor and σ-donor interaction is sometimes defined as synergic, as the electron wants in opposite directions facilitate each other.

Evidence for the π-acceptor communication comes from various sources.

 

2091_Untitled.png

 

Fig. 1. Bonding in CO complexes showing (a) σ overlap of CO lone-pair with empty metal d orbital, and (b) overlap of CO π* with occupied metal d

orbital.

 

Posted Date: 7/23/2012 7:52:56 AM | Location : United States







Related Discussions:- acceptor ligands -p (pi), Assignment Help, Ask Question on acceptor ligands -p (pi), Get Answer, Expert's Help, acceptor ligands -p (pi) Discussions

Write discussion on acceptor ligands -p (pi)
Your posts are moderated
Related Questions
which element has the highest oxidation state and why?


High energy bond in the intermediary metabolism

In an electrochemical cell a redox reaction perform in two halves. Electrons are liberated by the oxidation half reaction at one electrode and go through an electrical circuit

Theories of origin of petroleum : Theories should describe the following characteristics related with petroleum, Its association along with brine or sodium chloride solution.  T

what is colloid?

Soaps and detergents Sodium and pottasium salts of fatty acids such as palmitic acid, stearic acid, oleic acid etc are called soaps, while detergents are ammonium or sulphonate

Explain the Need For Product Development In the present market scenario of processed foods we observe that sales profile of established brand names undergo unpredictable fluct

Antimicrobials: These are the chemical substances employed to cure infections because of micro-organisms. These are as well known as microbes. Any creature that causes disease

Nucleic Acids - Biomolecules  In every living molecule there are available in nucleo-proteins that are made up of proteins and natural polymers of great biological significance