Giuseppe Agrifoglio
Jul 15, 1992
Citations
0
Influential Citations
9
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract Convenient new procedures were developed for preparing unsymmetric pyrazolylborate, [H 2 B(pz)(pz′)] − . Reaction of 3,5-dimethylpyrazole with BH 3 ·THF complex gives 3,5-dimethylpyrazole borane. Treatment of this compound with I 2 at room temperature gives the cation [H 2 B(3,5-Me 2 pzH) 2 ] + . When the reaction temperature was lowered to −30 °C we obtained the compound [H 2 B(3,5-Me 2 pzH)(I)], whose reactions with different pyrazoles in THF give the unsymmetric [H 2 B(3,5-Me 2 pzH)(pzH′)] + I − . Reaction of the boronium iodides with NaH produces [H 2 B(3,5-Me 2 pz)(pz′)] − Na + .