If {TAIL ~ the compound} is a disulfide, {HEAD ~ the disulfide bond} is broken and each sulfur is individually bonded to the metal 
If is broken
If { TAIL ~ the compound } is a disulfide , { HEAD ~ the disulfide bond } is broken and each sulfur is individually bonded to the metal
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH