What does (en) mean in a chemical formula/ligands

[A_lilah]

Homework Statement

What is the coordination number of [Pt(en)3](ClO4)4

Homework Equations

The Attempt at a Solution

I know the method to solve this one, I just have no idea what (en) is and if it is bidentate or polydentate (I've already tried monodentate and it was incorrect). Even the name of (en) would be fantastic!
Thanks :)

 

[Borek]

Most likely ethylenediamine.

 

[A_lilah]

Thanks so much :)

 

[chemisttree]

Yep. en = ethylenediamine. bidentate. Perchlorate is one of the non-coordinating anions. It is just there to balance the charge on the platinum.

 

[A_lilah]

Thank you :)