Electron acceptors and electron donors are usually called Lewis acids and Lewis bases, respectively. — Physical Chemistry — Kinetics Chemistry Question
Small molecule activation by frustrated Lewis pairs
Electron acceptors and electron donors are usually called Lewis acids and Lewis bases, respectively.
Trispentafluorophenylborane is a well-known Lewis acid for the polymerization of olefin. Propose a reaction to prepare trispentafluorophenyborane from boron trichloride and bromopentafluorobenzene.
Model Answer
[VISUAL] Chemical reaction equation showing the preparation of trispentafluorophenylborane.
The steric hindrance precludes the formation of classical bonds between Lewis acid and Lewis base. Propose a structure of Frustrated Lewis Pairs from the reaction of B(C6F5)3 and PH(t-Bu)2 if a zwitterion product is only obtained. (See Reference: Welch, G. C.; Juan, R. R. S.; Masuda, J. D.; Stephan, D. W. Science 2006, 314, 1124-1126.)
Model Answer
[VISUAL] Organic structure of the zwitterionic Frustrated Lewis Pair product.
Propose a reaction between the obtained zwitterion in 17.2 and Me2SiHCl.
Model Answer
[VISUAL] Chemical reaction equation showing the reaction between the zwitterion and Me2SiHCl.
Show the structure of the product obtained from the B(C6F5)3 and P(t-Bu)3 under hydrogen gas atmosphere.
Model Answer
[VISUAL] Organic structures representing the product under a hydrogen gas atmosphere.
If HD is used instead of dihydrogen gas, write down all possible products.
Model Answer
[VISUAL] Organic structures representing all possible products when HD is used.
Only one product is obtained from the reaction of B(C6F5)3 and P(t-Bu)3 under ethylene gas atmosphere. Draw its structure.
Model Answer
[VISUAL] Organic structure of the single product obtained under an ethylene gas atmosphere.
Draw the structure of the product if the reaction of the isolated product from 17.6 is carried out under nitric oxide gas atmosphere.
Model Answer
[VISUAL] Organic structure of the product formed under a nitric oxide gas atmosphere.
Only one product is obtained from the reaction of B(C6F5)3 and P(t-Bu)3 under carbon dioxide gas atmosphere. Draw its structure.
Model Answer
[VISUAL] Organic structure of the single product obtained under a carbon dioxide gas atmosphere.