Boron Hydride Chemistry of N-Substituted-Iminotriphenylphosphoranes
Boron Hydride Chemistry of N-Substituted-Iminotriphenylphosphoranes
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The amino -BH n fragments eventually reacted with protons to form amines or amine boranes. All of the reduction sequences produced a volatile amino compound. In order to explain the observed reaction products and their distribu- tions, in the experiments involving reduction of N,N-di- methylaminotriphenylphosphonium ion, intermediate reducing agents must have been formed.
In the first reduction sequence studied, a base was initially present which should be a stronger base than triphenylphosphin...e. Thus, the diborane produced in the first sequence would attach itself to iminotriphenylphos- phorane preferentially, and only a small amount of triphenylphosphine borane would be produced. Also, since neither iminotriphenylphosphorane borane nor ammonia borane were observed in the B nmr spectra, these compounds cannot have been in appreciable concentration long enough to exchange BH with triphenylphosphine. This is probably due to the low thermal stabilities of these two materials. The other two aminoborohydride fragments would not be expected 205 to have exchanged BH 3 with triphenylphosphine because of the basicities of the amino groups.
What to read after Boron Hydride Chemistry of N-Substituted-Iminotriphenylphosphoranes?
You can find similar books in the "Read Also" column, or choose other free books by Holley, William Keith, 1960- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The amino -BH n fragments eventually reacted with protons to form amines or amine boranes. All of the reduction sequences produced a volatile amino compound. In order to explain the observed reaction products and their distribu- tions, in the experiments involving reduction of N,N-di- methylaminotriphenylphosphonium ion, intermediate reducing agents must have been formed.
In the first reduction sequence studied, a base was initially present which should be a stronger base than triphenylphosphin...e. Thus, the diborane produced in the first sequence would attach itself to iminotriphenylphos- phorane preferentially, and only a small amount of triphenylphosphine borane would be produced. Also, since neither iminotriphenylphosphorane borane nor ammonia borane were observed in the B nmr spectra, these compounds cannot have been in appreciable concentration long enough to exchange BH with triphenylphosphine. This is probably due to the low thermal stabilities of these two materials. The other two aminoborohydride fragments would not be expected 205 to have exchanged BH 3 with triphenylphosphine because of the basicities of the amino groups.
What to read after Boron Hydride Chemistry of N-Substituted-Iminotriphenylphosphoranes?
You can find similar books in the "Read Also" column, or choose other free books by Holley, William Keith, 1960- to read onlineMoreLess
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