Since the presence of H2 in the formate synthesis acts as {HEAD ~ a diluent}, diffusing out {TAIL ~ the H2} is not necessary 
diffusing out
Since the presence of H2 in the formate synthesis acts as { HEAD ~ a diluent } , diffusing out { TAIL ~ the H2 } is not necessary
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH