separating {HEAD ~ the water} from {TAIL ~ the mixture} of to provide the metal alkoxide M2  
separating { HEAD ~ the water } from { TAIL ~ the mixture } of to provide the metal alkoxide M2
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH