Alphabetical Order

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Sartaj Bal 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

Alphabetical Order

Postby Sartaj Bal 1J » Tue Nov 26, 2019 3:04 pm

Can someone clarify what Professor said about coordination compounds and alphabetical order during lecture?

Amina Durrani 3G
Posts: 52
Joined: Sat Jul 20, 2019 12:16 am

Re: Alphabetical Order

Postby Amina Durrani 3G » Tue Nov 26, 2019 3:11 pm

When naming a coordination compound, write the ligands in alphabetical order and then write the metal (write ion if charged).

DMuth_1J
Posts: 63
Joined: Thu Jul 11, 2019 12:15 am

Re: Alphabetical Order

Postby DMuth_1J » Tue Nov 26, 2019 3:18 pm

What is the order of the metals / iond / ligands / other components of coordination compounds?

ABombino_2J
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Alphabetical Order

Postby ABombino_2J » Wed Nov 27, 2019 12:02 am

Do all the ligands in alphabetical order not paying attention to the greek prefixes then put the central metal atom. All of these must be in the coordination sphere. Following the items within the coordination sphere, put the other ions and molecules.

Ruth Glauber 1C
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Joined: Wed Sep 18, 2019 12:20 am

Re: Alphabetical Order

Postby Ruth Glauber 1C » Wed Nov 27, 2019 6:46 am

Can anyone walk me through an example?

Tiffany Vo 3G
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Joined: Sat Aug 17, 2019 12:17 am

Re: Alphabetical Order

Postby Tiffany Vo 3G » Wed Nov 27, 2019 11:43 am

Ruth Glauber 3L wrote:Can anyone walk me through an example?


If you're looking at 9c.1c, they give you [Co(CN)5 (OH2)] 2-. So if you'd start off by listing the ligands first: cyanide and water. If water is a ligand, you'd call it aqua and if cyanide is the ligand, you'd change it to cyanido because the ending of cyanide is -ide. You'd then have to put this in alphabetical order, so you'd have aqua first and then cyanido. In the compound, you have five cyanide ions, which you indicate using the greek prefix penta. You would then list the transition metal, cobalt, but add -ate to the end of it because the coordination complex has an overall negative charge. You'd then put the oxidation number of the metal in Roman numerals, which is III in this case. So you'd be left with aquapentacyanidocobaltate (III).

(I might be wrong).

EricZhao3G
Posts: 51
Joined: Tue Oct 08, 2019 12:16 am

Re: Alphabetical Order

Postby EricZhao3G » Thu Nov 28, 2019 1:49 am

You name a coordination compound by listing the ligands in alphabetical order, disregarding the prefix, and then the metal, with -ate if the coordination compound is negatively charged.


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