Orbitals and coordination numbers

[Zach Richardson 2f]

Why is the coordination number different from the number of ionic bonds a transition metal would form outside of a coordination compound?

[Hayden Lee 1C]

Hi,
The coordination number is the number of atoms bonded to the transition metal. If there is an atom bonded to the transition metal, it will be included within the brackets of its chemical formula. The transition metal complex can form ionic bonds, but these bonds may not be located on the transition metal itself. Hope this helps!

[Nicole Bruno Dis 1B]

The coordination sphere consists of the central metal ion/atom and its attached ligands. Brackets in a formula enclose the coordination sphere, but those outside the brackets aren't part of the coordination sphere. The coordination number of the central metal ion or atom is the number of donor atoms bonded to it.