Write the coordination number and geometry for [Co(NH3)2(NH2CH2CH2NH2)2]I2.

Answer 1

The coordination number of the complex [Co(NH3)2(NH2CH2CH2NH2)2]I2 is 6. This is because cobalt (Co) is coordinated to a total of 4 ligands: 2 ammonia (NH3) ligands and 2 bidentate ethylenediamine (NH2CH2CH2NH2) ligands. Each bidentate ligand forms two bonds with the central cobalt atom.

In terms of geometry, complexes with a coordination number of 6 typically adopt an octahedral geometry. Therefore, the geometry of the complex [Co(NH3)2(NH2CH2CH2NH2)2]I2 is octahedral.