Charge of ligands

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Sue Xu 2K
Posts: 58
Joined: Fri Sep 29, 2017 7:06 am

Charge of ligands

Postby Sue Xu 2K » Wed Dec 06, 2017 12:48 pm

Can ligands be positively charged?

Evelyn L 1H
Posts: 67
Joined: Fri Sep 29, 2017 7:05 am

Re: Charge of ligands

Postby Evelyn L 1H » Wed Dec 06, 2017 1:43 pm

No they are either neutral or negative. They cannot be positive if they are interacting with positive transition metals.

jillian1k
Posts: 54
Joined: Sat Jul 22, 2017 3:00 am

Re: Charge of ligands

Postby jillian1k » Wed Dec 06, 2017 1:46 pm

Ligands cannot be positively charged. The concept behind complexes/coordination compunds is that electron rich species (ligands) act as lewis bases and donate a lone electron pair to a lewis acid (the metal) to form a coordinate covalent bond. Multiple of these bonds combine to make a complex. Therefore ligands can only be anionic or neutral, and the central metal can only be cationic or neutral.

Chem_Mod
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Re: Charge of ligands

Postby Chem_Mod » Wed Dec 06, 2017 2:32 pm

They do exist (for instance NO+) but this isn't very commonly seen in this class.


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