ChemInform Abstract: β,β‐Dinitro Derivatives of N‐Alkyl‐N′‐alkoxydiazene N‐Oxides.

Abstract

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Nitric Oxide Adsorption in Cu3btc2-Type MOFs—Physisorption and Chemisorption as NONOates

“…These two signals appear in the typical 15 N chemical shift range of N=Ntype compounds. 57,60 Therefore, this is the first report of NONOate signals by solid-state NMR in a porous system. On the basis of signal intensity, the signal at −72 ppm could also indicate a decomposition product.…”

“…For comparison, in diazoketone, the signal of the carbon attached to nitrogen is shifted by 10 ppm because of formation of an alkylated NONOate. 57 Although shifts in paramagnetic systems are not straightforward to compare with diamagnetic systems, the similarity offers some hint for the assignment to NONOate signals. Figure 8 summarizes the 13 C isotropic shift changes for both UHM-37 and Cu 3 btc 2 samples as a function of NO loading.…”

“…Luk'yanov et al reported a single narrow 14 N signal around −70 ppm for alkyl-Nalkoxydiazene-N-oxides (an alkylated NONOate) generated from the reduction of diazoketone. 57 Fluck and Ekkehard report 15 N signals for NONOate at 12 and −159 ppm by the reaction between ethylamine and NO in the liquid state. 61 However, for this compound, the IR frequency of 1133 cm −1 is different from the reported values of a NONOate of 1470− 1510, 1270−1315, and a weak signal of 1000−1060 cm −1 , 27 which were also observed for NO-loaded UHM-37.…”