C2O2 is a bidendate ligand &Cl - is a mono dendate ligang. ---> The coordination number of Co is 2*2 + 2 = 6 EDTA is a hexadentate ligang & Br is a mono dentate ligang. ---> The coordination number of Co is 6+1=7 Solution C2O2 is a bidendate ligand &Cl - is a mono dendate ligang. ---> The coordination number of Co is 2*2 + 2 = 6 EDTA is a hexadentate ligang & Br is a mono dentate ligang. ---> The coordination number of Co is 6+1=7.