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