Multiple choice

The reagent used as a catalyst and complexing ligand in the organic reactions is

  1. 1,8-Diazabicyclo[5.4.0]undec-7-ene

  2. Dibutylboron trifluoromethanesulphonate

  3. Dichloromethyl methyl ether

  4. Diethyl azodicarboxylate

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A Correct answer
Explanation

1,8-Diazabicyclo[5.4.0]undec-7-ene or more commonly DBU, is a chemical compound and belongs to the class of amidine compounds. It is used in organic synthesis as a catalyst and complexing ligand and a strong (pKa = 24.34 in acetonitrile) non-nucleophilic base.