14N quadrupole coupling in thermochromic N-5-chlorosalicylideneaniline
β Scribed by E. Hadjoudis; F. Milia; J. Seliger; R. Blinc
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 198 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The temperature dependence of the proton-t4N double resonance spectra demonstrates that thermochromism in solid N-S&lorosalicylideneaniline is accompanied by intramolecular proton transfer and an enol-keto transformation.
π SIMILAR VOLUMES
The r4N electric quadrupole coupling constants and asymmetry parameters have been determined for the three chemically nonequivalent nitrogen sites in 2-cycle-octyl-amino+nitropyridine (COANP) with the help of proton-nitrogen nuclear quadrupole double resonance.
The "N electric quadrupole coupling constants and asymmetry parameters have been detetmioed for the three chemicalIy oooequivalent nitrogen sites in both 4-(N,Ndimethyhunioo)-3-acetamidonitrobeozeoe (DAN) and ( -)-2-(a-methylbenzylomamino)-5-oitropyridine (MBANP) with the help of proton-nitrogen ouc
hIi E&C 5% nuclear quadrupoJ? resonances in imidazole were observed. U&g deuterafed samples, the EQR of the deuterium in P&-C bond and the first unamb~~ous ideu~ication of t.be quadrupole couplkg constants at a bi-coordinate N site were cbtaiaed.
## Abstract Using highβfield NMR, we have determined the magnitude of the nuclear quadrupole interaction in hexamethylene triperoxide diamine (HMTD), the explosive allegedly used in the London bombings of July 2005. The experimental quadrupolar coupling constant, 5.334 MHz, is in good agreement wit