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
Product Optimization Sensory analysis during this phase of product development is critical and includes extensive evaluation with many kinds of tests, each playing a specific

what are the applications of this principle in agricultural engineering

tell me the methods of preparation of nitrenes?

Q. Explain about Gravity Separation? This is one of the simplest processes of concentration of ores. It is based on the difference in the specific gravities of the gangue and o

What are the Types of Acceptance Tests? There are two main aspects to acceptance testing: Measurement of Acceptability  Comparison of acceptability or preference

Evaluation of food quality A common practice employed to evaluate the shelf life of a given food product is to determine changes in selected quality characteristics over a per

Binary phase diagrams of two component systems are usually Two dimensional plots of temperature and composition.


#question how many calories are required to heat 1.0g water from 15 to 65c..