Naming Coordination Compounds

Moderators: Chem_Mod, Chem_Admin

Haley Pham 4I
Posts: 51
Joined: Fri Aug 09, 2019 12:16 am

Naming Coordination Compounds

Postby Haley Pham 4I » Sun Dec 01, 2019 1:00 am

What are the steps in naming coordination compounds?

dtolentino1E
Posts: 101
Joined: Thu Jul 11, 2019 12:17 am

Re: Naming Coordination Compounds

Postby dtolentino1E » Sun Dec 01, 2019 9:22 am

1. When naming a complex ion, the ligands are named before the metal ion.

2. Write the names of the ligands in the following order: neutral, negative, positive. If there are multiple ligands of the same charge type, they are named in alphabetical order. (Numerical prefixes do not affect the order.)

3. Multiple occurring monodentate ligands receive a prefix according to the number of occurrences: di-, tri-, tetra-, penta-, or hexa. Polydentate ligands (e.g., ethylenediamine, oxalate) receive bis-, tris-, tetrakis-, etc.

4. Anions end in -ido. This replaces the final “e” when the anion ends with “-ate” (e.g, sulfate becomes sulfato) and replaces “-ide” (cyanide becomes cyanido).

5. Neutral ligands are given their usual name, with some exceptions: NH3 becomes ammine; H2O becomes aqua or aquo; CO becomes carbonyl; NO becomes nitrosyl.

6. Write the name of the central atom/ion. If the complex is an anion, the central atom’s name will end in -ate, and its Latin name will be used if available (except for mercury).

7. If the central atom’s oxidation state needs to be specified (when it is one of several possible, or zero), write it as a Roman numeral (or 0) in parentheses.

8. End with “cation” or “anion” as separate words (if applicable).

Angeline 3E
Posts: 50
Joined: Wed Sep 18, 2019 12:20 am

Re: Naming Coordination Compounds

Postby Angeline 3E » Sun Dec 01, 2019 12:47 pm

dtolentino4H wrote:1. When naming a complex ion, the ligands are named before the metal ion.

2. Write the names of the ligands in the following order: neutral, negative, positive. If there are multiple ligands of the same charge type, they are named in alphabetical order. (Numerical prefixes do not affect the order.)

3. Multiple occurring monodentate ligands receive a prefix according to the number of occurrences: di-, tri-, tetra-, penta-, or hexa. Polydentate ligands (e.g., ethylenediamine, oxalate) receive bis-, tris-, tetrakis-, etc.

4. Anions end in -ido. This replaces the final “e” when the anion ends with “-ate” (e.g, sulfate becomes sulfato) and replaces “-ide” (cyanide becomes cyanido).

5. Neutral ligands are given their usual name, with some exceptions: NH3 becomes ammine; H2O becomes aqua or aquo; CO becomes carbonyl; NO becomes nitrosyl.

6. Write the name of the central atom/ion. If the complex is an anion, the central atom’s name will end in -ate, and its Latin name will be used if available (except for mercury).

7. If the central atom’s oxidation state needs to be specified (when it is one of several possible, or zero), write it as a Roman numeral (or 0) in parentheses.

8. End with “cation” or “anion” as separate words (if applicable).

replying because i want to savre this in my posts :D thank you this is helpful!

Debora Fernandez Clemente_ 4H
Posts: 52
Joined: Wed Sep 18, 2019 12:21 am

Re: Naming Coordination Compounds

Postby Debora Fernandez Clemente_ 4H » Sun Dec 01, 2019 8:15 pm

When we are naming coordinate compounds are we supposed to memorize the chart that professor Lavelle has in the website?


Return to “Naming”

Who is online

Users browsing this forum: No registered users and 1 guest