Proton sponges: solid-state NMR spectra of ionic complexes of 1,8-bis(dimethylamino)naphthalene
✍ Scribed by Krzysztof Woźniak
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 833 KB
- Volume
- 374
- Category
- Article
- ISSN
- 0022-2860
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## Abstract The ESCA spectrum of protonated 1,8‐bis‐(dimethylamino) naphthalene (“proton sponge”) (I) has been recorded in the region of N1s binding energies. The results indicate that IH^+^ possesses an __unsymmetrical__ NH…︁N hydrogen bridge.
An ionic complex of 1,8-bis(dimethylamino)naphthalene with picrolonic acid was studied by C and 1 H magic angle spinning and x-ray diffraction. Structural and spectroscopic features of this compound were investigated. The detailed x-ray structure of this complex is described. A multicentre model of
## Abstract Hydrogen and carbon‐13 NMR chemical shifts of five complexes of 1,8‐bis(dimethylamino)naphthalene with strong acids were measured in acetonitrile‐__d__~3~ and nitromethane‐__d__~3~ and identified by 2D, NOE difference and long‐range enhanced COSY spectra. The assignments of the resonanc
Low-temperature (120 K) studies of the structure of the DMAN Á DCI adduct indicate that in symmetrical [NHN] hydrogen bridge of 2.571 (1) A ˚length (2.579(2) A ˚at room temperature) there is a disorder of the H-atom occupying two positions at nitrogen atoms with a distance of 0.94(3) A ˚. The compa