The photographic element 2 wherein {HEAD ~ T1} is a timing or linking group which functions by electron transfer down an unconjugated chain and is of {TAIL ~ the formula} 
The photographic element 2 wherein { HEAD ~ T1 } is a timing or linking group which functions by electron transfer down an unconjugated chain and is of { TAIL ~ the formula }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL