Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Reaction of 5-(2-hydroxy-3,5-dinitrophenylazo)-8-hydroxyquinoline N-oxide with copper(II).Application of 1127-45-3.
Taking as an example the color reaction between Cu(II) and 5-(2-hydroxy-3,5-dinitrophenylazo-8-hydroxyaquinoline N-oxide (I), the possibility of a new class of anal. reagents based on 8-hydroxyquinoline N-oxide azo compounds was studied. Significant differences were observed when using this class of reagents in complex formation compared to 8-hydroxyquinoline azo derivatives As a result of complex formation I is converted from the azoid form to the quinone-hydrazone form. I reacts with Cu(II) to form a violet-complex in aqueous media and pH 5.9-6.5 with λ maximum at 530 nm. The molar absorptivity of the complex is (9.5 ± 0.1) × 103. The same complex forms in 50% aqueous Me2CO medium at pH 5.5-6.0; λ maximum is at 530 nm with a molar absorptivity of (1.57 ± 0.03) x 104. A rapid extraction-spectrophotometric procedure was developed for Cu determination in Zn alloys and steel by using I. Beer’s law is obeyed up to 1.5 μg Cu/mL. Zn 200; Mn, Ag, and Pb 100; Co 25; and Ni 20; Cl- and NO3- 1000; SO42- 800; and F- 125-fold excess do not interfere; Al, Fe(III), and Cr(III) do. Al and Fe interference can be masked by addition of NaF.
After consulting a lot of data, we found that this compound(1127-45-3)Application of 1127-45-3 can be used in many types of reactions. And in most cases, this compound has more advantages.
Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider