when n is 1, M represents {TAIL ~ ruthenium}, Q represents benzene or p cymene, and Y represents a chlorine atom, a bromine atom, or {HEAD ~ an iodine atom} 
when n is 1 , M represents { TAIL ~ ruthenium } , Q represents benzene or p cymene , and Y represents a chlorine atom , a bromine atom , or { HEAD ~ an iodine atom }
OTH OTH OTH OTH OTH 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 OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD