The preferred practice of the Collins method is to use {HEAD ~ a mole ratio} of {TAIL ~ complexing agent} to Zr that is similar to the mole ratio of organic base to Zr 
of
The preferred practice of the Collins method is to use { HEAD ~ a mole ratio } of { TAIL ~ complexing agent } to Zr that is similar to the mole ratio of organic base to Zr
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH