adding "ion" at the end of a name

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Josephine Lu 4L
Posts: 62
Joined: Fri Sep 28, 2018 12:18 am

adding "ion" at the end of a name

Postby Josephine Lu 4L » Sat Dec 08, 2018 3:50 pm

When we name a coordination complex with a charge (positive or negative), do we need to add the word "ion" at the end?

Simran Rai 4E
Posts: 58
Joined: Fri Sep 28, 2018 12:17 am

Re: adding "ion" at the end of a name

Postby Simran Rai 4E » Sat Dec 08, 2018 4:07 pm

Lyndon had mentioned in his review session that it's good practice to do so, just to be safe. However I don't think you'd be docked points if you didn't add it.

Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Re: adding "ion" at the end of a name

Postby Diviya Khullar 1G » Sat Dec 08, 2018 4:09 pm

You would have to add "ion" to the end of the name of a coordination complex with a positive or negative charge but not a coordination compound. The difference between these two is that a coordination complex stands alone with nothing outside of the brackets to counter the positive or negative charge while coordination compound has an ion that counters the positive or negative charge on the coordination complex.
For example:
[Ni(CN)4]-2 would be named tetracyanonickelate (II) ion
K2[Ni(CN)4] would be named potassium tetracyanonickelate (II)

Justin Haggard 1E
Posts: 17
Joined: Fri Sep 28, 2018 12:18 am

Re: adding "ion" at the end of a name

Postby Justin Haggard 1E » Sat Dec 08, 2018 7:03 pm

Ion indicates that it has either a negative or positive charge. It is important to still calculate the charges of the atoms in the compound if you are writing the compound formula from its name, because "ion" will not always be included at the end of the name, even if it is charged. In other words, don't rely on "ion" being at the end of the coordination compound name to determine whether it is charged or not.

Tessa Lawler 1A
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: adding "ion" at the end of a name

Postby Tessa Lawler 1A » Sat Dec 08, 2018 11:14 pm

I also had this question. Thanks for asking it!


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