Complex Ions, Ligands, & Coordination Compounds, Basic Introduction Chemistry

This chemistry video tutorial provides a basic introduction into complex ions, ligands, and coordination compounds. A complex ion typically consist of a transition metal cation bounded to ligands which can be neutral molecules or ions. The number of ligands attached to the transition metal ion is known as the coordination number. This video explains how to determine the oxidation state of the transition metal ion in a complex ion and within a coordination compound. A coordination compound consist of a complex ion and a counterion. The counterion may be a cation or an anion. This video briefly discusses werner's theory of coordination compounds and the concept of primary valence and secondary valence as it relates to the transition metal ions in complex ions.

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[huzbinaru]

In most part of the video, you kept saying that coordination number is the number of ligands attached but it's somewhat an incorrect definition, y'know. Coordination number depends on the number of dative bonds central metal ion is attached to, so let's say if a hexadentate ligand (a molecule or ion that can form six dative bonds) attaches itself with a transition metal ion, it's coordination number will be six depending on what I said and would be one from what you have explained, which would be wrong.

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