1823-47-8Relevant articles and documents
Integration of an aminopyridine derived cobalt based homogenous cocatalyst with a composite photocatalyst to promote H2evolution from water
Irfan, Rana Muhammad,Khan, Sayed Ali,Tahir, Mudassir Hussain,Ahmad, Tauqeer,Ali, Liaqat,Afzal, Masood,Ali, Hazrat,Abbas, Anees,Munawar, Khuram Shahzad,Zhao, Jianqing,Gao, Lijun
, p. 5561 - 5567 (2021)
Inexpensive cocatalysts are promising materials to improve the performance of photocatalytic systems. However, a cocatalyst can be anchored onto a photosensitizer in certain amount and further loading can hinder the visible light by blocking the active si
Intramolecular hydrogen bonding and tautomerism in Schiff bases. Structure of N-(2-pyridil)-2-oxo-1-naphthylidenemethylamine
Nazir,Yildiz,Yilmaz,Tahir,ülkü
, p. 241 - 250 (2000)
N-(2-pyridil)-salicylidene (1) and N-(2-pyridil)-2-oxo-1-naphthylidene- methylamine (2) were studied by elemental analysis, IR, 1H NMR and UV- visible techniques and the structure of compound (2) was examined crystallographically. The UV-visible spectra of 2-hydroxy Schiff bases are investigated in different solvents, acidic and basic media. Compound (2) is in tautomeric equilibrium (phenol-imine, O-H···N ? keto-amine, O···H-N forms) in polar and non-polar solvents. These tautomers are not observed in polar and non-polar solvents for (1) as also supported by 1H NMR and UV- visible data. The keto-amine form of compound (2) was observed in basic solutions of DMSO, ethanol, chloroform, benzene, cyclohexane and in acidic solutions of chloroform and benzene, but not in acidic solutions of DMSO and ethanol. On the contrary, this form for compound (1) was not observed in the same solutions. The asymmetric unit of compound (2) contains two independent molecules of (C16H12N2O) which constitute a tautomeric pair. The observed differences in the related C = N (1.317(4) and 1.330(4) A?) and C-O (1.279(4) and 1.263(4) A?) bond lengths in the two crystallographically independent molecules indicate that the phenol-imine and the keto-amine forms coexist in the solid state. Intramolecular hydrogen bond lengths (O-H···N) are 2.586(4) A? and 2.518(4) A? for the two individual tautomers. It crystallizes in the monoclinic space group P21/n with a = 5.837(2), b = 17.476(2), c = 24.295(3) A?, β = 91.95(4)°, V = 2476.9(6) A?3, Z = 4 and D(x) = 1.3315 g cm-3. (C) 2000 Elsevier Science B.V.
Spontaneous resolution of a Δ/Λ-chiral-at-metal pseudo-tetrahedral Schiff-base zinc complex to a racemic conglomerate with C-H?O organized 41- and 43-helices
Enamullah, Mohammed,Vasylyeva, Vera,Quddus, Mohammad Abdul,Islam, Mohammad Khairul,H?fert, Simon-Patrick,Janiak, Christoph
, p. 4724 - 4734 (2018)
The Schiff-base ligand N-2-(pyridyl)salicylaldimine (HL) reacts with zinc(ii) acetate or nitrate to obtain the enantiomorphous chiral-at-metal compound Δ/Λ-bis[N-2-(pyridyl)salicylaldiminato-κ2N,O]zinc(ii), [Zn(L)2] (1), which crysta
Synthesis, spectroscopic characterization and DNA cleavage studies of dibutyltin(IV) complexes of bidentate Schiff bases
Dubey, Raj Kumar,Singh, Avadhesh Pratap,Patil, Sangamesh A.
, p. 39 - 45 (2014)
Reactions of di-n-butyltin(IV)dichloride with sodium salts of Schiff bases in tetrahydrofuran-benzene solution in 1:1 and 1:2 stoichiometry afforded complexes of the types [(n-Bu)2Sn(sb)Cl] and [(n-Bu) 2Sn(sb)2], respectiv
Triorganotin(IV) derivatives of bidentate schiff bases: Synthesis and spectral studies
Dubey, Raj Kumar,Singh, Avadhesh Pratap,Dwivedi, Nalini
, p. 1038 - 1045 (2012)
Reaction of tri-n-butyl tin(IV) chloride with the sodium salt of Schiff bases [salicylidene-2-aminopyridine (sapH), salicylidene-2-amino-4-picoline (sapicH), salicylidene-2-methyl-1-aminobenzene (o-smabH), salicylidene-4-methyl- 1-aminobenzene (p-smabH),
Synthesis, structural characterization, DFT and molecular simulation study of new zinc-Schiff base complex and its application as a precursor for preparation of ZnO nanoparticle
Galini, Masumeh,Salehi, Mehdi,Kubicki, Maciej,Bayat, Mehdi,Malekshah, Rahime Eshaghi
, (2020)
In this study, the metal complex [ZnL(2-aminopyridine)Br] (I) was synthesized from a metal salt with Schiff base ligand (HL). The synthesized complex (I) was elucidated by using FT-IR, UV–Vis spectroscopy, 1H NMR, and. Moreover, the crystal str
Synthesis of some new anils: Part 1. Reaction of 2-hydroxy-benzaldehyde and 2-hydroxynaphthaldehyde with 2-aminopyridene and 2-aminopyrazine
Asiri, Abdullah M.,Badahdah, Khadija O.
, p. 1796 - 1804 (2007)
New Schiff bases derived from 2-aminopyridene and 2-aminopyrazine have been synthesized. The UV-Visible spectra of the compounds have been investigated in acetonitrile and toluene. The compounds were in tautomeric equilibrium (enol-imine O-H...N, keto-ami
Bioactivity of azomethines derived mechanochemically from 2-amino pyridine and studies on the effect of substituents on the reaction
Sarma, Madhushree Das,Ghosh, Subhojit
, p. 1295 - 1303 (2020/12/04)
Azomethines with pyridine framework serve as excellent pharmacophore. A number of azomethine derivatives were synthesised from 2-aminopyridine and differently substituted aromatic aldehydes in excellent to almost quantitative yields through green, mechanochemical protocol. Influence of the substituents in the nuclei of aromatic aldehydes on the rate of the reaction was investigated. Presence of ortho hydroxy groups in the nucleus of aromatic aldehydes led to the completion of the reactions in almost no time with nearly quantitative yields. 2,2'-diphenyl-1-picrylhydrazyl (DPPH) radical was used to evaluate the in vitro antioxidant activity of the prepared azomethines and the results were compared with standard natural antioxidant L-ascorbic acid. Most of the derivatives showed fairly strong antioxidant property. Antibacterial activity of the prepared azomethines were examined against Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) strains by using agar well diffusion method. Some of the azomethines exhibited encouraging antibacterial activities.
