Month: December 2022

Evendijk, J. E. published the artcileSeparation and identification of explosive powder with two-dimensional thin-layer chromatography, Product Details of C12H9N3O4, the publication is Explosivstoffe (1968), 16(7), 152-4, database is CAplus.

Up to 18 components encountered in explosive powder mixtures can be completely separated and easily identified by thin-layer chromatog. by using 0.3-mm. SiO2 gel HF254 layers on glass plates. From 20 to 230 mg. of a powder mixture is extracted with CH2Cl2 and applied to glass plates by using as a pouring solution a 20:23 mixture of PhCl and ClCH2CH2Cl.

Explosivstoffe published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Product Details of C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Dolique, Roger published the artcileRelation between ultra-violet absorption and structure of derivatives of acetic and malonic acids, COA of Formula: C10H20O2, the publication is Annali di Chimica Applicata (1931), 425-521, database is CAplus.

The mutual influence on the absorption spectra of 2 neighboring chromophores diminishes with separation, and ceases when they are separated by more than 3 C atoms. In the preparation of disubstituted malonic esters the yield is improved if that substituent which contains a Ph nucleus is introduced first. Excess of Et malonate improves the yield in the preparation of monoalkyl derivatives of Et malonate. Improvements in the preparation of several of the following compounds are recorded. The Na derivative of Et n-butylmalonate (b₁₂ 127¡ã) with ¦Ã-phenylpropyl bromide gives Et ¦Ã-phenylpropylbutylmalonate, b₁₅ 212-3¡ã (35% yield), also obtained by reversing the order of introduction of the substituents (yield 33%), and purified by re-esterification of the acid, m. 137.5-8¡ã (yield of acid 91%). The heated acid gives ¦Á-(¦Ã-phenylpropyl)hexoic acid, m. 38¡ã, b₁₉ 215¡ã. Similar reactions give Et ethylbutylmalonate, b₁₃ 128¡ã, ¦Á-ethylhexoic acid, b₇₅₅ 222¡ã, b₁₈ 131¡ã (benzyl ester, b₁₃ 150¡ã; cf. Levene and Taylor, C. A. 17, 66), Et butylbenzylmalonate, b₁₅ 187¡ã (yield 35% from Et butylmalonate, or 52% from Et benzylmalonate) (Dox and Yoder, C. A. 16, 1934) (acid, m. 104.5¡ã), ¦Á-benzylhexoic acid, b₁₄ 185¡ã, b₁₀ 179¡ã (yield 95%) [Et ester, b₇₅₆ 274¡ã, b₁₆ 156¡ã (yield 82%); benzyl ester, b₂₈ 234-6¡ã, b₁₆ 222-3¡ã (yield 80%)], Et dibutylmalonate, b₁₈ 151-2¡ã (yield 55%; yield of acid 96%, ¦Á-butylhexoic acid, b₁₅ 149¡ã [Et ester, b₇₅₂ 218¡ã, b₁₈ 110¡ã (yield 84%), benzyl ester, b₁₅ 177¡ã, amide, m. 134.5¡ã (sublimes 100-10¡ã)] (cf. Levene and Cretcher, C. A. 12, 1546), Et ¦Â-phenylethylbutylmalonate, b₁₅ 203¡ã, b₁₇ 205¡ã (yield 34%, or 40%) [acid, m. 139¡ã (yield 86%)], ¦Á-(¦Â-phenylethyl)hexoic acid, b₁₇ 201-2¡ã, b₂₈ 238-9¡ã, Et dibenzylmalonate, b₂₂ 238¡ã (yield 75%) [acid, m. 174¡ã (yield 90%)], ¦Â-phenyl-¦Á-benzylpropionic acid, m. 91¡ã [Et ester, b₁₈ 202¡ã (yield 75%); benzyl ester, m. 81¡ã (yield 87%); amide, m. 129.5¡ã]. Et phenylmalonate gives Et phenylbutylmalonate (yield 58%), hydrolyzed to the acid, m. 153¡ã, and ¦Á-phenylhexoic acid, h₂₀ 182-3¡ã (also obtained by heating phenylbutylmalonic acid, and by hydrolysis of ¦Á-phenylhexonitrile, b₂₀ 151.1-2.5¡ã, obtained from CH₂PhCN by means of NaNH₂ and BuBr). Et ¦Á-ethylhexoate, reduced by Bouveault’s method (Bull. soc. chim. 9, 372(1893)), gives ¦Â-ethylhexanol, b₇₅₈ 180¡ã, b₂₇ 96-7¡ã, b₁₈ 89-90¡ã (yield 58%). Similarly are obtained ¦Â-butylhexanol (yield 63%; also obtained by similar reduction of ¦Á-butylhexoamide, yield 8%) (phenylurethan, m. 39¡ã), ¦Â-benzylhexanol, b₂₇ 170-1¡ã (yield 60%, also from the amide in small yield) (phenylurethan, m. 55.5¡ã). ¦Â-Phenyl-¦Á-benzylacetamide by similar treatment gives ¦Ã-phenyl-¦Â-benzylpropanol, m. 27-8¡ã, b₁₀ 197¡ã (phenylurethan, m. 94¡ã) (in better yield than from the ester), and a little ¦Ã-phenyl-¦Â-benzylpropylamine (Bz derivative, m. 104¡ã). ¦Á-Methyl-¦Á-ethylpentanol, b₂₇ 79-80¡ã, ¦Á-methyl-¦Á-benzylpentanol, b₂₇ 155¡ã, b₁₈ 144¡ã, ¦Â-Phenyl-¦Á-benzyl-¦Á-methylethanol (from AcOEt and CH₂Ph.MgCl), b₁₅ 182¡ã, and ¦Á-benzyl-¦Á-methylpentanol (from Me.CO.CH₂Ph and MgBuBr), b₂₇ 155¡ã, b₁₈ 144¡ã, could not be obtained optically pure.

Annali di Chimica Applicata published new progress about 3115-28-4. 3115-28-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is 2-Butylhexanoic acid, and the molecular formula is C10H20O2, COA of Formula: C10H20O2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Del Campo, Pilar published the artcileThin-layer chromatographic stability determination of powder containing diphenylamine as a stabilizer, COA of Formula: C12H9N3O4, the publication is Ion (Madrid) (1975), 35(410), 633-41, database is CAplus.

Thin-layer chromatog. (TLC) provides high reliability in determining the remaining life of a propellant at a given time. By means of a “stabilogram” and with only 1 TLC plate, it is possible to visualize the actual state of the propellant and its resistance to forced aging. 13 Different kinds of propellant, double or single base, were subjected to different aging temperatures and time intervals and examined by traditional (Me violet paper) and TLC methods. The more accurate TLC method is carried out on silica gel G precoated plates and eluted with C6H6. Visualization is by alc. NaOH or by the Mouraour reagent, or without reagents. Colors and Rf of the different dinitro- and trinitro- derivatives of diphenylamine are given.

Ion (Madrid) published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Curtis, Neville J. published the artcileIsomer distribution of nitro derivatives of diphenylamine in gun propellants: nitrosamine chemistry, COA of Formula: C12H9N3O4, the publication is Propellants, Explosives, Pyrotechnics (1990), 15(5), 222-30, database is CAplus.

The derivatization of diphenylamine in single-base gun propellants was studied as a function of aging at 80¡ã. The relative proportions of 2-nitrodiphenylamine (I) and 4-nitrodiphenylamine (II) varied from 32:68 to 63:37, according to propellant type. Preferences for para substitution were seen in exptl. lots stabilized with I, II, and N-nitrosodiphenylamine. Increasing water content resulted in higher preferences for ortho substitution. II is a better stabilizer than I. Model studies with nitro-substituted N-nitrosamines show that para substitution is preferred in boiling AcOH. Mechanisms for the conversion of N-nitrosamines into isomeric nitro derivatives are discussed in relation to the model studies and the behavior in propellants. Procedures are given for the preparation of N-nitrosamines.

Propellants, Explosives, Pyrotechnics published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Csaszar, J. published the artcileOn the spectra of some acceptor-type polynitro derivatives of biphenyl, biphenylmethane and biphenylamine, COA of Formula: C12H9N3O4, the publication is Acta Physica et Chemica (1987), 33(1-4), 11-21, database is CAplus.

The UV and visible spectra of nitro and polynitro derivatives of diphenylamine were investigated and the substituent effects were interpreted in comparison with the corresponding biphenyl and diphenylmethane derivatives

Acta Physica et Chemica published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Creger, Paul L. published the artcileMetalated carboxylic acids. III. Monoalkylation of alkylacetic acids. Possible alternative to the malonic ester synthesis for the preparation of dialkylacetic acids, Safety of 2-Butylhexanoic acid, the publication is Journal of the American Chemical Society (1970), 92(5), 1397-8, database is CAplus.

Alkanoic acids are converted to RCH2CO2-Na+, (R = cycloalkyl or C1-8 alkyl). The salts are treated with BuLi and and [RCHCO2]2- Li+ Na+ obtained are treated with BuBr, hexyl bromide, and n-octyl bromide to give RR1CHCO2H.

Journal of the American Chemical Society published new progress about 3115-28-4. 3115-28-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is 2-Butylhexanoic acid, and the molecular formula is C10H20O2, Safety of 2-Butylhexanoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Citron, Joel D. published the artcileReductions with organosilicon hydrides. III. Reduction of acyl fluorides to esters, SDS of cas: 312-40-3, the publication is Journal of Organic Chemistry (1971), 36(17), 2547-8, database is CAplus.

Aliphatic RCOF are heated with Et3SiH or (PhCH2)3SiH to give RCO2CH2R. Pentanoyl fluoride (I) is treated with Et3SiH and R1CHO is added to give Me(CH2)3CO2CH2R1 (R1 = alkyl, Ph); PhCN does not affect the reaction of I with Et3SiH and pentyl pentanoate is formed. Terephthaloyl fluoride reacts with Et3SiH to give polymer. Esters are not obtained when Ph2SiH2 is used.

Journal of Organic Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, SDS of cas: 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Choi, Zel-Ho published the artcileSynthesis and properties of anionic tetrakis(pentafluorophenyl)indium(III) complexes, Computed Properties of 1206-46-8, the publication is Journal of the Korean Chemical Society (1999), 43(1), 52-57, database is CAplus.

The anionic complexes, [In(C₆F₅)₄]^–, which are thermal and moisture sensitive, have been prepared by the reaction of In(C₆F₅)₃¡¤D (D = MeCN, Et₂O) with the system Me₃SiC₆F₅/CsF, C₆F₅MgBr or Cd(C₆F₅)₂. The stable anionic indium(III) complexes are obtained through cation exchange with PNPCl ([PNP] = bis(triphenylphosphino)ammonium). The pure substance is obtained by column chromatog. These new anionic complexes are unambiguously identified by NMR-spectroscopy, IR spectroscopy, mol. weight, DTA/TG and elemental anal.

Journal of the Korean Chemical Society published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, Computed Properties of 1206-46-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Chiarotto, Isabella published the artcileTetraethylammonium hydrogen carbonate: A cheap, efficient, and recyclable catalyst for transesterification reactions under solvent-free conditions, Recommanded Product: Tetraethylammonium hydrogencarbonate, the publication is Synthetic Communications (2016), 46(22), 1840-1847, database is CAplus.

Tetraethylammonium hydrogen carbonate (TEAHC) was proven to be an efficient catalyst for transesterification reactions in the absence of solvent. The reaction between isopropenyl or Et acetate and an alc. (not efficient in the absence of catalyst) was induced by the presence of TEAHC, which seems to assist the proton transfer from the alc. to the ester, yielding the corresponding acetate in very good yields in the absence of any solvent. Moreover, the TEAHC can be recycled several times without significant loss in activity.

Synthetic Communications published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, Recommanded Product: Tetraethylammonium hydrogencarbonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Casy, A. F. published the artcileCarbon-13 NMR as a convenient aid to the differentiation of triethylenetetraamine (TETA) dihydrochloride from related impurities, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Journal of Pharmacy and Pharmacology (1981), 33(5), 333-4, database is CAplus and MEDLINE.

Proton-noise and off-resonance decoupled ¹³C spectra were obtained on an NMR spectrometer for recrystallized TETA-2HCl [38260-01-4] in D₂O. The correct number of lines required by the 3 nonequivalent C atoms in this structure were displayed, whereas that of the impurity, tris(2-aminoethyl)amine-3HCl [4097-89-6] showed one less signal, consistent with 2 nonequivalent C atoms. A com. sample of diethylenetriamine [111-40-0] had a spectrum with 2 major lines only. Piperazine and other impurities were observable in spectrums of TETA base samples. Levels of impurities of 5% and probably lower could be detected.

Journal of Pharmacy and Pharmacology published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia