Coordination metals?

1. Dec 18, 2006

pivoxa15

I thought that as a general rule when writing out compound names (in full) involving a coordination metal, the charge of the coord metal must be stated in Roman Numerals. If nothing is specified than a charge of +1 is assumed.

But I came across a compound involving zinc written zinc..... without any roman numeral so I assumed it had +1 charge when bound within the compound. But it turned out to have +2 charge. Why don't they specify it by writing zinc(II)..... ?

2. Dec 18, 2006

Gokul43201

Staff Emeritus
Where did you get that last bit from? From what I recall, the oxidation state may be left unspecified if the metal is in its most common oxidation state. For Zinc, the +2 oxidation state is most common.

3. Dec 19, 2006

pivoxa15

Good point, I think I made it up. Zinc likes to lose 2 electrons in its outer 4S shell doesn't it.

4. Dec 19, 2006

Gokul43201

Staff Emeritus
Yes, that's right.

Last edited: Dec 19, 2006