A method in accordance 8, wherein {TAIL ~ said metal} is platinum, {HEAD ~ palladium} and ruthenium 
A method in accordance 8 , wherein { TAIL ~ said metal } is platinum , { HEAD ~ palladium } and ruthenium
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH