• Title/Summary/Keyword: 4-nitroaniline

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Sweet Taste Mechanism of 1-Alkoxy-4-nitroaniline (1-알콕시-4-니트로아닐린들의 糖度에 關한 硏究)

  • U. R. Kim;M. S. Jhon;Y. B. Chae
    • Journal of the Korean Chemical Society
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    • v.17 no.6
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    • pp.391-394
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    • 1973
  • A semiempirical molecular orbital theory which is known as extended H ckel theory is applied to explain the sweet taste mechanism of nitroaniline, 1-methoxy-4-nitroaniline, and 1-ethoxy-4-nitroaniline which has different sweetness respectively. In this paper, the assumption is made that the nitroaniline is coplanar. The relationship between charge density and sweetness has been calculated according to the geometrical rotation of the orthosubstitute of nitroanilines. It has been shown that the calculated results are consistent with the experimental order of the relative sweetness.

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Structures of (4-Nitro-benzylidene)-(3-nitro-phenyl)-amine and trans-Dichlorobis (3-nitroaniline) palladium(II) ((4-Nitro-benzylidene)-(3-nitro-phenyl)-amine 및 trans-Dichlorobis(3-nitroaniline) palladium(II)의 구조)

  • Lee Hee K.;Lee Soon W.
    • Korean Journal of Crystallography
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    • v.16 no.1
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    • pp.6-10
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    • 2005
  • A novel potential linking ligand (4-nitro-benzylidene)-(3-nitro-phenyl)-amine (1) was prepared from 4-nitrobenzaldehyde and 3-nitroaniline by the Schiff-base condensation. From the reaction between 1 and dichlorobis(benzonitrile)palladium (II) $(PdCl_2(NCPh)_2)$, an unexpected product $trans-PdCl_2(NO_2-C_6H_4-NH_2)_2$ (2) was isolated. Compounds 1 and 2 were structurally characterized by X-ray diffraction. In compound 2, the $NH_2$ hydrogen atoms in the 3-nitroaniline ligand participate in intermolecular N-H${\cdot}\;{\cdot}\;{\cdot}\;$Cl hydrogen bonds.

Efficient Method for the Cleavage of Fullerene Oxides with Several Aromatic Amines under Ultrasonic Irradiation (초음파 조건에서 방향족 아민 화합물을 사용한 풀러렌 산화물 쪼개짐 반응)

  • Lee, Jong-Wook;Lee, Young-Min;Park, Byoung-Eun;Ko, Weon-Boe
    • Elastomers and Composites
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    • v.42 no.1
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    • pp.1-8
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    • 2007
  • The cleavage of fullerene oxides with several aromatic amines such as 4-nitroaniline, 3-nitroaniline, 4-isopropylaniline in the present of $FeCl_3$ occurred under ultrasonic irradiation in air at $25{\sim}43^{\circ}C$. The aminated fullerenes were confirmed by MALDI-TOF-MS and UV-vis spectra.

Sonochemical Reaction of Fullerene Oxides, [C70(O)n](n≥1) with Aromatic Amines (방향족 아민 화합물과 풀러렌 산화물의 [C70(O)n](n≥1)의 초음파 화학 반응)

  • Ko, Weon-Bae;Park, Byoung-Eun;Lee, Young-Min
    • Elastomers and Composites
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    • v.43 no.1
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    • pp.31-38
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    • 2008
  • Sonochemical reaction of fullerene oxides, $[C_{70}(O)_n](n\geq1)$ with several aromatic amines such as 4-nitroaniline, 3-nitroaniline, and 4-isopropylaniline, in the presence of $FeCl_3$ were investigated under ultrasonic irradiation. This method is applicable to a wide variety of aromatic amines especially ring deactivated, to afford the corresponding cleavage products under mild conditions. The aminated fullerenes were confirmed by MALDI-TOF-MS and UV-vis spectra.

Preparation of Nanosized Gold Particles by Microwave Irradiation and Kinetics Study for Reduction of 4-Nitroaniline under Various Conditions

  • Kim, Jae Jin;Ko, Weon Bae
    • Elastomers and Composites
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    • v.50 no.4
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    • pp.274-278
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    • 2015
  • Nanosized gold particles were synthesized by microwave irradiation in a mixture composed of potassium tetrachloroaurate(III) n-hydrate, sodium citrate dihydrate and Tween 20. The synthesized gold particles were characterized by UV-vis spectrophotometer, scanning electron microscopy, and X-ray diffraction techniques. Using UV-vis spectroscopy, it was confirmed that gold nanoparticles act as a catalyst in the reduction of 4-nitroaniline with sodium borohydride to form 1,4-diaminobenzene. Additionally, we studied the kinetics of this reductive reaction in the presence of these gold nanoparticles under various conditions.

Synthesis of Gold Nanoparticles Using Fullerene Oxide and Their Catalytic Activity for Reduction of 4-Nitroaniline

  • Park, Geun Wook;Ko, Jeong Won;Ko, Weon Bae
    • Elastomers and Composites
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    • v.54 no.2
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    • pp.105-109
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    • 2019
  • Gold nanoparticles were synthesized by reacting potassium tetrachloroaurate ($KAuCl_4$), potassium carbonate ($K_2CO_3$), and isopropyl alcohol in the presence of fullerene oxide [$C_{60}(O)_n$, $n{\geq}1$], which was, in turn, prepared from [$C_{60}$] fullerene and m-chloroperoxybenzoic acid under refluxing conditions. The crystallinity and morphology of the prepared gold nanoparticles were confirmed by UV-vis spectroscopy, X-ray diffraction, and scanning electron microscopy. The activity of the gold nanoparticles in the reduction of 4-nitroaniline was measured in order to determine its capability as a catalyst.

Characteristics of Chlorination Byproduct Formation of Synthetic Nitrogenous Compounds (합성유기질소 성분에서의 염소 소독부산물 생성 특성)

  • Son, Hee-Jong;Hwang, Young-Do;Roh, Jae-Soon;Bean, Jae-Hoon
    • Journal of Korean Society of Environmental Engineers
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    • v.32 no.5
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    • pp.523-530
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    • 2010
  • This study was conducted to analyze and determine formation potentials for chlorination disinfection by-products (DBPs) from 14 synthetic nitrogen compounds with or without $Br^-$. 5 of 14 compounds were 3-aminobenzoic acid, 2-aminophenol, aniline, anthranilic acid and 4-nitroaniline that were relatively shown high for formation of THMs/DOC whether or not $Br^-$ presented. 6 compounds that were p-nitrophenol, 3-aminobenzoic acid, 2-aminophenol, aniline, anthranilic acid and 4-nitroaniline were shown high for formation of haloacetic acids (HAAs)/DOC whether or not $Br^-$ presented. Trichloroacetic acid (TCAA) was dominated in 6 compounds. The formation of haloacetonitriles (HANs)/DOC whether or not $Br^-$ presented was high in 3-aminobenzoic acid, 2-aminophenol, aniline and anthranilic acid. Specially, aniline was detected 14.6∼16.1 ${\mu}g/mg$. The formation of chloral hydrate (CH)/DOC and chloropicrin (CP)/DOC were shown high in 3-aminobenzoic acid and 2-aminophenol in 14 compounds. 6 compounds (3-aminobenzoic acid, 2-aminophenol, aniline, anthranilic acid, 4-nitroaniline, p-nitrophenol) and a commercial humic acid were tested for the formation of DBPs/DOC whether or not $Br^-$ presented. When $Br^-$ was added, the DBPs/DOC was higher for the order of aniline> anthranilic acid> 3-aminobenzoic acid> 4-nitroaniline> humic acid> p-nitrophenol> 2-aminophenol. And when $Br^-$ was not added, the DBPs/DOC was higher for the order of anthranilic acid> aniline> p-nitrophenol> humic acid> 4-nitroaniline> 3-aminobenzoic acid> 2-aminophenol.

Crystal Structure of N[1(benzotriazol-1-yl)butyl]-p-nitroaniline (N-[1-(benzotriazol-1-yl)butyl]-p-nitroaniline의 구조)

  • Jo, So-Ra;Kim, Mun-Jip;Seong, Nak-Do
    • Korean Journal of Crystallography
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    • v.5 no.2
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    • pp.78-84
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    • 1994
  • The crystal structure of N-11-(benzotriazol-1-yl)butyl]-P-nitroaniline ( C16H17N502) has been determinedfromsingle crystal x-ray diffractionstudy:C16H17N502 monoclinic, P21/n, a=17542(2)A, b=10.755(3)A, c=8.891(1)A, β=104.58(1)˚, V=1623.4(5)A3, 7=293(2)K, Z=4, Cuka(A = 1.5418A) , The molecular structure was solved was by direct meshed refined by full-matrix least squares to a final R =0.0411 for 2248 unique observed [F≥4o(p) ] reflections and 255 Parameters. The crystal structure is stabilized by intermolecular N (11) -Hl 1 (Nl 1) ‥‥N (3) hydrogen bond with N(11) ‥‥ N(3) =3.136(2)A and N(11)-Hll(Nll)‥‥N(3) =164.1(15) ˚.

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Synthesis of Anticoagulant 3-(N-Aryalmino)-1,4-Naphthoquinones(III) (항응고성의 3-(N-Arylamino)-1,4-Naphthoquinone 유도체 합성(III))

  • Ryu, Chung-Kyu
    • YAKHAK HOEJI
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    • v.34 no.6
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    • pp.422-428
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    • 1990
  • 2,3-Dibromo-1,4-naphthoquinone was reacted with p-aminobenzoic acid, 2-aminopyridine, 2-amino-4-metylpyridine, m-nitroaniline, sulfathiazol, p-chloroaniline, phenetidine and 2-bromo-3-(N-arylamino)-1,4-naphthoquinones($1{\sim}8$). 2,3-Epoxy-2,3-dihydro-1,4-naphthoquinone was also reacted with p-amonobenzoic acid, p-toluidine, p-chloroaniline, m-chloroaniline, m-nitroaniline, p-phenetidine, N,N-dimethyl-1,4-pheylenediamine as a ring opening and dehydogenation to form 2-hydroxy-3-(N-arylamino)-naphthoquinones ($9{\sim}16$) in good yield. These new compounds($1{\sim}16$) are expected to have a biological activities such as anticoagulant and cytotoxic.

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Solvent Effect in Nucleophilic Reactions of Substituted Benzoyl Chlorides with p-Nitroaniline (치환염 벤조일과 파라니트로아닐린과의 친핵반응에 미치는 용매효과에 관한 연구)

  • Kim, Wang Gi
    • Journal of the Korean Chemical Society
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    • v.18 no.4
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    • pp.251-258
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    • 1974
  • The rate constants for the nucleophilic substitution reactions of substituted benzoyl chlorides with p-nitroaniline in such solvents as acetone, acetonitrile, methanol, ethanol, etc. were conductometrically determined, and the activation thermodynamic parameters were also evaluated. In result, the reaction rates were faster in protic solvents than in aprotic solvent; in the solvents of similar property, the reaction rate in the solvent of the large dielectric constant was faster than that in the solvent of the small dielectric constant. Hammett plots in individual solvents showed the straight lines with positive slope; and we concluded that the reaction occurred via the addition-elimination mechanism.

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