0
A example of a pi acid ligand is carbon monoxide(CO). CO is a good pi acceptor (lewis acid) due to empty pi* orbitals and a good sigma donor (lewis acid)**. When bonding to a metal the ligand (in this case CO) sigma donates to an empty d-orbital and the filled d-orbitals of the metal donates to the empty pi* orbitals of CO, back donation. This only occurs when the metal has an oxidation state <3+ as higher oxidative states cause electron density to contract towards the metal.
** Im pretty sure a (electron)donor is a Lewis base.. I could add that backdonation is more likely to give stable compounds with the transitionmetals to the left in the Periodic Table (p.t.) and less likely with the transitionmetals to the right. The number of protons increases as you go to the right in the p.t. and the positive charge "grows", resulting in the metal holding on more tightly to the electrons. This will give a very airsensitive (unstable) compound.
Short version: A pi acid ligand is a molecule that binds to a metal by accepting electrons through (antibonding) pi-orbitals. (accepting electrons-Lewis acid, donating electrons- Lewis base)
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
4 CO is a pi acceptor ligand Why?
The CO ligand can easily back-bond, accepting electron density from the metal centre through pi bonds. This is because of the empty anti-bonding orbitals.
What are pi acceptor ligand?
ligands which can accept electrons from the metal d orbital into there anti bonding orbital such as CO, or C=C
What is inner sphere mechanism?
such a mechanism in which a ligand can be transfers from one co-ordination sphere to other through a bridging ligand . a oxidant compound have such type of ligand .
How many pi bonds in lactic acid?
1
Is EDTA hexadentate ligand or tetradentate?
It is hexadentate strong field ligand a polydentate ligand is also known as chelating agent because it forms chelate like structure around the central metallic ion.
What kind of ligand is oxalic acid?
generally a bidentate, dianionic ligand
Amino acid like L-arginine is a bidentate ligand or tridentate ligand?
L-arginine is a bidentate ligand
4 CO is a pi acceptor ligand Why?
The CO ligand can easily back-bond, accepting electron density from the metal centre through pi bonds. This is because of the empty anti-bonding orbitals.
What are pi acceptor ligand?
ligands which can accept electrons from the metal d orbital into there anti bonding orbital such as CO, or C=C
What is the name of the complex ion of en?
en is an abbreviation for ethylendiamine as a ligand; a very known and useful complex is the ethylenediaminetetraacetic acid.
What is ligand-dependent?
Requiring a ligand to serve its function
How many pi bonds are present in acetylsalicylic acid?
Every double bond has one pi bond and one sigma bond. There are five double bonds in acetylsalicylic acid, so there are five pi bonds.
Is sulphate a ligand in chemistry?
yes , it is a flexidentate ligand its denticity can be one or two
What type of ligand is nitrogen dioxide?
It is not a ligand because does not have a lone pair of electrons but nitrite NO2-1 is a strong basic or strong field ligand.
What is inner sphere mechanism?
such a mechanism in which a ligand can be transfers from one co-ordination sphere to other through a bridging ligand . a oxidant compound have such type of ligand .
Is benzene a pi acid?
No, benzene is always a neutral compound.
How many pi bonds in lactic acid?
1
