Figure 16 This shows a ball and stick model of the complex. In the centre is a grey sphere with six sticks attached to it to form an octahedral shape. The sticks are coloured grey at the end adjoining this sphere and red at the other end. Attached to the red ends of each stick is a red sphere. Each red sphere is also attached to two sticks coloured red and white. These are arranged in a V-shape. At the white end of each of these sticks is a white sphere. The model can be rotated.