Coordination compounds latin names

[WYacob_2C]

When are we supposed to substitute metals with their latin name when naming coordination compounds?

[Angus Wu_4G]

No I don't think so, but you should add "ate" to the end of the name of the transition metal if the overall coordination compound is negatively charged.

[christabellej 1F]

You would use a Latin name for Fe. When writing the coordination compound name, you would write ferrum (or ferrate) instead of iron.