Ilan Shavolian 1K
Posts: 58
Joined: Fri Sep 29, 2017 7:03 am

Can someone help me understand just what a ligand is?
Is it used when referring to the bonds, or the whole substance?
if its referring to the bond, how is it any different than any other bond?
basically i'm just asking you to tell me all you know about ligands hahaha,

Peter Dis1G
Posts: 97
Joined: Fri Sep 29, 2017 7:04 am

### Re: Some clarification about ligands

Basically a ligand is a Lewis base(which donates electrons) that attaches to the central metal atom. Ex:[Fe(CN)6]^-4. [CN] is a ligand that bings to iron. And the coordination number(number of points ligands attach) is 6. Hope other people can add more.

James Nguyen 3G
Posts: 19
Joined: Sat Jul 22, 2017 3:00 am

### Re: Some clarification about ligands

Ligand refers to the atom or molecule that binds to the central metal atom. When Ammonia forms part of a coordination compound with a transition metal, such as Iron, Ammonia is considered a ligand.

Julian Krzysiak 2K
Posts: 49
Joined: Fri Sep 29, 2017 7:07 am

### Re: Some clarification about ligands

Ligand is another name for a Lewis base which bonds to a central metal atom/ion. A Lewis base is able to do this by the presence of lone pairs, allowing the atom to "donate" its electrons and covalently bond to the central metal atom.

This bond is called a coordination covalent bond, and the whole structure with connected ligands forms a coordinate complex. A coordinate compound is a electrically neutral compound that contains at least one complex. The coordinate number is the number of ligands connected to the central atom. E.g. Ni(CO)$_{4}$ would have a coordination number of 4, as 4 ligands are connected to the central atom.

Ilan Shavolian 1K
Posts: 58
Joined: Fri Sep 29, 2017 7:03 am

### Re: Some clarification about ligands

thank you guys^^

Wenxin Fan 1J
Posts: 53
Joined: Thu Jul 13, 2017 3:00 am

### Re: Some clarification about ligands

A ligand is a Lewis base that bonds to a transition metal central atom. It doesn't refer to the entire compound.