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Writing formulas

Posted: Tue Dec 04, 2018 7:59 pm
by Noh_Jasmine_1J
How do you write the chemical formula for coordinations compounds? Are they alphabetical?

Re: Writing formulas

Posted: Tue Dec 04, 2018 8:00 pm
by Claire Guo 1B
Yes, they are named with their ligands alphabetically.

Re: Writing formulas

Posted: Tue Dec 04, 2018 8:05 pm
by Claire Guo 1B
If there is more than one ligand you put the prefixes "di-, tri-, tetra-" before its name. However, do not order the ligands alphabetically by the prefixes- just by the ligand name itself. After writing the ligands, name the metal ion. If the ion is negatively charged, add "-ate" to the metal name. If the ion is positive, just leave the metal name as is. Finally, write the oxidation number for the number as a roman numeral in parenthesis. You can find this by finding the charge of the metal. Then add "ion" at the end if the molecule is charged.