acceptor ligands -p (pi), Chemistry

Assignment Help:

 

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.

 


Related Discussions:- acceptor ligands -p (pi)

Define the phenomenon resonance, When a molecule is shown by two or more ne...

When a molecule is shown by two or more nearly equal structures, which vary in the arrangement of electrons, then the molecule is said to exhibit resonance.

What is gluten, Q. What is gluten? What is gluten? Certainly you know t...

Q. What is gluten? What is gluten? Certainly you know that gluten is the protein found in wheat. Gluten is more or less made up of equal parts of gliadin and glutenin. Look up

Homework help, seawater contains 0.75g of Fe+3 per kilogram of water. What ...

seawater contains 0.75g of Fe+3 per kilogram of water. What is the concentration of Fe_3 in ppm?

Types of plasma sources, Types of plasma sources: The three types of p...

Types of plasma sources: The three types of plasma sources and the sources for their power are as given below. P lasma Source S o u r c e of p

Calculate pH of a solution, A 0.5M solution of NaNO2 is made. What is the p...

A 0.5M solution of NaNO2 is made. What is the pH of the solution?

Electron, electron partic;e moving as awave

electron partic;e moving as awave

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