✍ Scribed by Armando Ariza-Castolo; M. Angeles Paz-Sandoval; Rosalinda Contreras
No coin nor oath required. For personal study only.
The synthesis and NMR spectra of the N‐borane adducts of two diimines, N‐borane‐bis(α‐phenylethylidene)ethylenediamine and N‐borane‐bis(α‐phenylbenzylidene)ethylenediamine, and four imines, N‐borane‐α‐methylethylidene‐2‐phenylethylamine, two N‐borane‐α‐phenylethylidene‐n‐butylamines and N‐borane‐α‐phenylbenzylidene‐n‐butylamine, are reported. The NMR spectra of the N‐borane adducts of these imines can be used to determine their configuration.
📜 SIMILAR VOLUMES
## Abstract A series of thirteen ^15^N‐enriched __N__‐aryl imines derived from benzaldehydes and acetophenones have been prepared and examined by ^13^C and ^1^H NMR. Preferred conformations of the C‐arvl and __N__‐aryl rings have been deduced from ^13^C chemical shifts and ^13^C‐^15^N couplings. Ev
## Abstract ^13^C and ^15^N NMR chemical shifts were measured for __N__^1^‐alkyl‐__N__^2^‐arylthioureas. The absence of decoalescence of the __N__^1^‐alkyl group carbon signals down to 190 K, the europium‐induced chemical shifts and the molecular mechanics calculations indicate that the preferred c
C and 15 N NMR data are reported for nine azoloazines. From the results obtained it is found that the 15 N chemical shifts are particularly well placed to provide reliable data on both the structures of the compounds studied and on their potential to undergo valence and prototropic tautomerism. Of p
## Abstract The ^15^N chemical shifts and ^1^H^15^N and ^13^C^15^N coupling constants of nine monolabelled indazoles were measured and assigned. The experimental values are discussed in terms of the indazolic and iso‐indazolic structures, and compared with literature data for other related hetero