when n is 0 and {HEAD ~ M} is iridium or {TAIL ~ rhodium}, Q represents 1,5 cyclo octadiene or norbornadiene, and Y represents ClO4, PF6 or BF4 ; and 
is
when n is 0 and { HEAD ~ M } is iridium or { TAIL ~ rhodium } , Q represents 1,5 cyclo octadiene or norbornadiene , and Y represents ClO4 , PF6 or BF4 ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH