Complex sentence: One of the first examples of this kind of clusters is a tricobalt nonacarbonyl cluster that contains a methyl carbyne ligand (CCH 3) bonded to the three cobalt atoms: (Co 3 (CCH 3) (CO) 9).
Split into simpler sentences: One of the first examples of type kind of clusters is a tricobalt nonacarbonyl cluster. It contains a methyl carbyne ligand (CCH 3) bonded to its three cobalt atoms: (Co 3 (CCH 3) (CO) 9).