## Writing coordination compound formulas

Dan 4k
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

### Writing coordination compound formulas

When writing the formula for a coordination compound, do you base the alphabetical order off of the name of the molecules and ions, or off of the actual atoms. For example: pentaamminechloronickel (III) chloride, would the formula be [NiCl(NH3)5]Cl2 or [Ni(NH3)5Cl]Cl2. Basically would you base alphabetization off of the N in NH3 and the Cl or off of the "a" in ammine and the "c" in chloro?

Kim Vu 2G
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

### Re: Writing coordination compound formulas

For pentaamminechloronickel (III) chloride, both of the formulas of [Ni(NH3)5Cl]Cl2 and [NiCl(NH3)5]Cl2 work and for the naming ligand, the letter a in ammine comes before the letter c in chloro so ammine gets named before chloro.

Dan 4k
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

### Calculating Cell Potential

If E(cell)=E(cathode)-E(anode), why, when the E for the oxidation(anode)=-1.50V, and the E for the reduction(cathode)=0.96V, is the answer 0.96V-1.50V=-0.54V. Shouldn't it be 0.96V-(-1.50V)??