Boron-11 chemical shifts in the determination of donor-acceptor strengths—VII

Nitrogen nuclear magnetic resonance spectroscopy in inorganic, organometallic, and bioinorganic chemistry

“…(The well-known contraexamples in organic compounds, of which pyridine is the most notorious, appear to have special explanations which do not apply to the M-NN of the dinitrogen ligand the Na resonance shifts very slightly downfield, but the N« resonance moves upfield by ca. 70 ppm, as expected for stabilization of the "lone-pair" electrons in forming a bond to aluminum. The inductive effect is likely to lower the LUMO also, but to a lesser extent, for N^.…”

A Safe and Scalable Procedure for Preparation of α-Picoline–Borane from Sodium Mono-acyloxyborohydrides and α-Picoline

“…There are three known types of reactions for the preparation of amine–boranes: (1) Reaction of amines with gaseous diborane or borane–ligand complexes (BH 3 –L), such as BH 3 –THF and BH 3 –dimethylsulfide, prepared in situ. , (2) Reaction of amine hydrochlorides and NaBH 4 . , (3) Reaction of NaBH 4 with amines in the presence of cation-exchange resins . Each reaction described above, however, has some problems from an industrial production viewpoint.…”