naming

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Edward Suarez 1I
Posts: 75
Joined: Fri Sep 28, 2018 12:27 am

naming

Postby Edward Suarez 1I » Fri Dec 07, 2018 9:07 pm

how do we find oxidation number? is it something we have to memorize? (like how do. you know the oxidation number of CN is -1?)

Diego Gonzalez 3F
Posts: 32
Joined: Fri Sep 28, 2018 12:26 am

Re: naming

Postby Diego Gonzalez 3F » Fri Dec 07, 2018 9:13 pm

For CN (Cyanide) yes you must memorize the charge of -1. There is a list on Professor Lavelles website titled "Naming Coordination Compounds" that has all the ligands you need to memorize along with their charges. If its not on there, its either a transition metal that can have multiple oxidation states or its charge can be found by simply counting which group the element is in.

Krisdylle Repollo 4H
Posts: 33
Joined: Fri Sep 28, 2018 12:28 am

Re: naming

Postby Krisdylle Repollo 4H » Fri Dec 07, 2018 9:16 pm

I think it's helpful to just memorize the oxidation states of the molecules that we've been practicing during the lectures because they'll most likely pop up during the exam at some point and it'll be helpful if you know it right away. But if you don't, you can always try doing the Lewis structure. For cyanide, the carbon has a triple bond with nitrogen, so the carbon has a lone pair which gives it a negative charge of 1.

Daniel Bowen 3I
Posts: 32
Joined: Fri Sep 28, 2018 12:24 am

Re: naming

Postby Daniel Bowen 3I » Fri Dec 07, 2018 10:01 pm

There are some common ligands that you should familiarize yourself with the charges. But as for finding the oxidation state of transition metals, it is based on the overall charge of the coordination compound. For example: Ag(CN)2- has an oxidation state of +1 because CN has a charge of -1 and there is 2 of them. The overall charge of the compound is -1 so therefore the charge of silver must be +1

305117729
Posts: 30
Joined: Fri Sep 28, 2018 12:16 am

Re: naming

Postby 305117729 » Fri Dec 07, 2018 10:10 pm

For cyano- we need to know it's -1, and for the charge on metal ion we could basically calculate it.

Edward Suarez 1I
Posts: 75
Joined: Fri Sep 28, 2018 12:27 am

Re: naming

Postby Edward Suarez 1I » Sun Dec 09, 2018 3:12 am

ah i see; i suppose i will just memorize them. thank you!


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