Reference

Applicability of the Hammett equation in a-(p-substituted phenylazo)-p-nitrobenzylcyanides

Applicability of the Hammett equation in a-(p-substituted phenylazo)-p-nitrobenzylcyanides. Bhaskare, C.In this experiment, several chemicals are used like 555-21-5 K.; Mukhedkar, A. J. (Shivaji Univ., Kolhapur, India). J. Shivaji Univ.: Sci., 16, 57-60 (English) 1976. CODEN: JSUSDA. DOCUMENT TYPE: Journal CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 22, 79, 80 The pka values of azo dyes (I), prepd. by coupling p-nitrobenzyl cyanide [555-21-5] with diazotized aniline and p-substituted anilines, were 9.Several reagents such as 555-21-5 is used here.05 (R = NO2), 10.06 (Cl) 10.19 (Br), 10.46 (I), 10.62 (F), 10.64 (H), 11.15 (Me), 10.88 OEt), and 11.18 (OMe) in 50% MeOH-H2O mixt. and showed a linear relation with Hammett s functions. The high molar absorbance (e = 1.6 ′ 104 to 4.7 ′ 104) and well sepd. absorption max. for the acidic (mol.) form (~400 nm) and basic (ionic) form (~560 nm) suggest that I may be used as acid-base indicators. ..

Protonation, ethylation, and allylation of substituted nitrobenzenes in the gas phase

A study by ion kinetic energy spectrometry and chemical ionization. Kruger, T. L.; Flammang, R.; Litton, J. F.; Cooks, R. G. (Dep. Chem.In this article, certain chemicals are used. Some of their cas registry numbers are 555-21-5 and 100-00-5 , Ball State Univ., Muncie, Indiana, USA). Tetrahedron Lett., (50), 4555-8 (English) 1976. CODEN: TELEAY. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The ion structures of protonated, ethylated, and allylated 4-(O2N)C6H4R (R = NO2, Cl, OH, CH2CN) were studied by mass-analyzed ion kinetic energy spectrometry. Protonation, ethylation, and allylation lead to products in which the NO2 group acts as the basic site even in competition with Cl and OH groups. This exemplifies the dominant role of intramol. charge delocalization in stabilizing isolated gas phase ions. .