Question

The coordination numbers of Co and Al in ${ [Co(Cl)(en)2]Cl}$ and ${K3[Al(C2O4)3]}$, respectively, are : (en=ethane-1,2-diamine)

• A. 3 and 3
• B. 6 and 6
• C. 5 and 6
• D. 5 and 3

Answer 1

Answer: (C)

5 and 6

Answer 2

en and ${C2O4^{2-}}$ are bidentate ligand. So coordination number of ${[Co(Cl)(en)2]Cl}$ is $5$ and ${K3[Al(C2O4)3]}$ is $6$.