when n is 0 and M is palladium, Q represent π allyl, and {HEAD ~ Y} represents {TAIL ~ ClO4}, PF6, or BF4 
represents
when n is 0 and M is palladium , Q represent π allyl , and { HEAD ~ Y } represents { TAIL ~ ClO4 } , PF6 , or BF4
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH