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(m.n)-Homorubins. Syntheses and Structures

(m.n)-Homorubins. Syntheses and Structures

The solvent was removed (rotovap) at water aspirator vacuum, the residue was taken into CH 2 Cl 2, and passed through a short column of silica gel using CH 2 Cl 2 as the eluent. All of the first yellow band to elute was collected, the solvent was removed (rotovap), and the residue was recrystallized from hexane to afford the desired ethyl ester .

Lab Equipment - Sorbent Technologies

Lab Equipment - Sorbent Technologies

Dimethyl sulfoxide7.21.4783268 189 3 Trichloroethylene101.467 87.19 276 0 Water10.21.333190 100 8 Pentane Cyclopentane Heptane Hexane Isooctane Cyclohexane Carbon .

Orgo Lab Exam 2 Flashcards | Quizlet

Orgo Lab Exam 2 Flashcards | Quizlet

1,4 dimethoxy benzene. Is a neutral compound. pKa Benzoic acid. pKa of benzoic acid ≈ 4.17 (Strong acid) pKa of 2-napthol. pKa 2-Napthol ≈ 9.5 (Weak acid) . Rotovap usefulness. vacuum lowers pressure, and therefore lowers boiling point of flammable liquid to then evaporate it. n-Hexane density and boiling point. density: 0.66 g/ cm3

Organic Lab-Exam 1 Flashcards | Quizlet

Organic Lab-Exam 1 Flashcards | Quizlet

the rotovap is useful for. removing solvents from nonvolatile solutes. washing. dissolves the impurities and leaves behind material we want to isolate. . when there is substitution of a monosubstituted benzene ring there are _ possible monosub products. 3, ortho/meta/para.

A General Photocatalytic Route to Prenylation - Rathnayake .

A General Photocatalytic Route to Prenylation - Rathnayake .

Prenylation of Aniline: A 12 × 75 mm borosilicate tube fitted with a rubber septum was charged with Eosin Y (0.6 m m, 0.6 mL in DMSO), aniline (0.12 mmol, 1 equiv.), t BuONO (0.24 mmol, 2 equiv.) and [(2‐methylbut‐3‐en‐2‐yl)sulfonyl]benzene (0.6 mmol, 5 equiv.). Then the tube was placed in a light bath and the lower portion of the .

Evaporator Archives | BioChromato

Evaporator Archives | BioChromato

Evaporation is an integral part of chemistry research and the de facto instrument is the Rotary Evaporator, also referred to as Rotovap. As much as they are commonly used for concentrating solvents, they also have a reputation for issues that include bumping and annihilating substances, slow evaporation, especially for DMSO / DMF and other high-boiling point substances and difficulty working .

Inhibition of Twisting of a Green Fluorescent Protein-like .

Inhibition of Twisting of a Green Fluorescent Protein-like .

Benzene, rt, 30 min. + The title compound (PyMDI) was conveniently obtained in a 76% yield via a Knoevenagel-type condensation of 2-pyridinecarbaldehyde with 1,2-dimethyl-1H-imidazol-5(4H)-one. 1 The reaction was catalyzed using 3-butyl-1,2-dimethyl-1H-imidazol-3-ium hydroxide, a

Alkylxylene sulfonates for enhanced oil recovery processes .

Alkylxylene sulfonates for enhanced oil recovery processes .

Jan 19, 2006 · The structures for the 4-alkyl-1,2-dimethyl benzene and the 3-alkyl-1,2-dimethyl benzene are given below. Preferably, the attachment of the alkyl group to the xylene moiety in the above alkylxylene sulfonate is at positions higher than the 2-position along the alkyl chain in at least 45 percent of the total alkylxylene sulfonate.

US Patent for Hydrocarbon and chlorinated hydrocarbon .

US Patent for Hydrocarbon and chlorinated hydrocarbon .

Stable liquid hydrocarbon-soluble novel magnesium dialkoxide compositions useful as or in the preparation of polymerization catalysts and initiators for the polymerization of alpha-olefins and diolefins are prepared, for instance, by reacting certain organomagnesium compounds in liquid hydrocarbon solvents with (a) aliphatic, cycloaliphatic or acyclic beta- and gamma-alkyl-substituted C.sub.5 .

An Efficient and Economic Synthesis of (+)-Nootkatone .

An Efficient and Economic Synthesis of (+)-Nootkatone .

6,6-dimethyl-bicyclo [3.3.1]heptan-2-one, Nopinone. Following a method as described . The solvent was removed via rotovap and the crude brown residue was dissolved in ether. The ethereal solution was passed through a series of dry . Freshly distilled benzene was cannulated into the apparatus and the

An Efficient and Economic Synthesis of (+)-Nootkatone .

An Efficient and Economic Synthesis of (+)-Nootkatone .

6,6-dimethyl-bicyclo [3.3.1]heptan-2-one, Nopinone. Following a method as described . The solvent was removed via rotovap and the crude brown residue was dissolved in ether. The ethereal solution was passed through a series of dry . Freshly distilled benzene was cannulated into the apparatus and the

Azeotropic Data for Binary Mixtures

Azeotropic Data for Binary Mixtures

C6H6 Benzene 67.9 0.440 C6H12 Cyclohexane 64.8 0.430 C6H14 Hexane 58.7 0.332 C7H8 Toluene 76.7 0.810 C8H18 Octane 77 0.898 Ethylene glycol C2H6O2 C7H8 Toluene 110.1 0.034 C7H16 Heptane 97.9 0.048 C8H18O Dibutyl ether 139.5 0.125 C10H22 Decane 161 0.406 Dimethyl sulfide C2H6S C5H12 Pentane 31.8 0.503 1,2-Ethanediamine C2H8N2 C7H8 Toluene 104 0 .

P-Xylene | C6H4(CH3)2 - PubChem

P-Xylene | C6H4(CH3)2 - PubChem

Humans exposed to 46 or 92 ppm of o-, m-, p-xylene or a mixture (1:1:1) of the three for 8 hr absorbed approx 64% of the inhaled xylene. No difference in the absorption rate was reported due to level of exposure, length of exposure, or the type and/or mixture of the xylene isomers.

Intermolecularly hydrogen-bonded dimeric helices .

Intermolecularly hydrogen-bonded dimeric helices .

4.1.7. 3,4-Dimethyl-1H-pyrrole (9) Ethyl 3,4-dimethyl-1H-pyrrole-2-carboxylate from above (4.7 g, 28 mmol) was dissolved in ethanol (40 mL), then a solution of NaOH (3.5 g) in water (15 mL) was added, and the mixture was heated at reflux overnight. After 16 h the reaction was complete, the volume was reduced (rotovap), and the resulting solid .

Tert-Butanol | (CH3)3COH - PubChem

Tert-Butanol | (CH3)3COH - PubChem

1,1-dimethyl ethanol. 2-methyl propan-2-ol. 2-methyl-propan-2-ol. 2-Methylpropan-2-ol. ACMC-209ozd. tert-Butanol HPLC grade. tert-Butanol ACS reagent. Ethanol, 1,1-Dimethyl-2-methyl-2-propyl alcohol. EC 200-889-7 (CH3)3COH. 4-01-00-01609 (Beilstein Handbook Reference) HOC(CH3)3. KSC377O4L. CHEMBL16502. Tertiary butyl alcohol reagent .

10.1016/j.coldregions.2007.08.005 | DeepDyve

10.1016/j.coldregions.2007.08.005 | DeepDyve

Jun 11, 2020 · Read "10.1016/j.coldregions.2007.08.005" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

What's the Best Ethanol for Commercial Solvent Extraction .

What's the Best Ethanol for Commercial Solvent Extraction .

Ethanol (EtOH or ethyl alcohol) is a multifaceted solvent that mixes without separation in water and other organic solvents including acetic acid, acetone, benzene, carbon tetrachloride, chloroform, diethyl ether, ethylene glycol, glycerol, nitromethane, pyridine, and toluene.

Synthetic Approaches to Manganese-Complexed Acenes for .

Synthetic Approaches to Manganese-Complexed Acenes for .

combined, dried with magnesium sulfate and sodium bicarbonate and solvent evacuated with a rotovap and then Schlenk-line vacuum at 300 µmHg. The dark red liquid is then distilled at 0.9–1.3 mmHg, with the desired compound collected as a light yellow liquid at 6080 . o. C (4.2 g, crude yield of 41%). The -

Sciencemadness Discussion Board - Synthesis of .

Sciencemadness Discussion Board - Synthesis of .

Apr 09, 2011 · Take the organic layer and remove the ether/benzene mixture by distilling off on a water bath, or use a rotovap if available. Once all of the solvent has been removed, transfer the crude Acetophenone to a clean distillation apparatus and distill using an air condenser. Collect the fraction boiling between 195-202 C. Pure Acetophenone should be .

Intermolecularly Hydrogen-Bonded Dimeric Helices .

Intermolecularly Hydrogen-Bonded Dimeric Helices .

4.1.7 3,4-Dimethyl-1H-pyrrole (9) Ethyl 3,4-dimethyl-1H-pyrrole-2-carboxylate from above (4.7 g, 28 mmol) was dissolved in ethanol (40 mL), then a solution of NaOH (3.5 g) in water (15 mL) was added, and the mixture was heated at reflux overnight. After 16 h the reaction was complete, the volume was reduced (rotovap), and the resulting solid .

Intermolecularly Hydrogen-Bonded Dimeric Helices .

Intermolecularly Hydrogen-Bonded Dimeric Helices .

4.1.7 3,4-Dimethyl-1H-pyrrole (9) Ethyl 3,4-dimethyl-1H-pyrrole-2-carboxylate from above (4.7 g, 28 mmol) was dissolved in ethanol (40 mL), then a solution of NaOH (3.5 g) in water (15 mL) was added, and the mixture was heated at reflux overnight. After 16 h the reaction was complete, the volume was reduced (rotovap), and the resulting solid .

1,2-Dimethoxybenzene ReagentPlus®, 99% | Veratrole | Sigma .

1,2-Dimethoxybenzene ReagentPlus®, 99% | Veratrole | Sigma .

Synonym: Pyrocatechol dimethyl ether, Veratrole CAS Number 91-16-7. Linear Formula C 6 H 4 (OCH 3) 2. Molecular Weight 138.16 . Beilstein/REAXYS Number 1364621 . EC Number 202-045-3. MDL number MFCD00008357. PubChem Substance ID 24848455. NACRES NA.22

Columbia University in the City of New York

Columbia University in the City of New York

Other organic solvents that are used in extractions include ethyl acetate (CH 3 CO 2 C 2 H 5), methylene chloride (CH 2 Cl 2), chloroform (CHCl 3), hexane (CH 3 (CH 2) 4 CH 3), and benzene (C 6 H 6).Benzene and chloroform are usually avoided as solvents due to their carcinogenic nature.

valve - Laboratory consumable - Verrerie Villeurbannaise

valve - Laboratory consumable - Verrerie Villeurbannaise

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1-(Amino-alkyl)-2-aryl-cyclohexane alcohols and esters .

1-(Amino-alkyl)-2-aryl-cyclohexane alcohols and esters .

Aug 10, 1976 · The extract is dried and heated at 100° until the evolution of nitrogen is above over, then refluxed 2 hours, concentrated to a slurry on the rotovap and the solid filtered and washed with benzene and cyclohexane to give 28.8 g of 4-methyl-6-phenyl-1-oxa-3-azaspiro [4.5] decan-2-one, m. 171°-3°.

Enantioselective Rhodium-Catalyzed [4+2+2] Cycloaddition .

Enantioselective Rhodium-Catalyzed [4+2+2] Cycloaddition .

S-4 Vinyl boronate ester 10 to dienes 13 and 14: Vinyl boronate ester 10 was prepared from alkyne 1c (20 mmol scale) according to literature procedures.1 To a flame-dried sealed tube charged with a magnetic stir bar and Pd(PPh 3) 4 (5 mol%, 0.39 mmol) was added 8 ml of benzene, boronate ester 10 (7.87 mmol dissolved in 8ml of benzene), NaOMe (15.74 mmol, 25 wt% solution in MeOH), and the .

dithizone - Verrerie Villeurbannaise

dithizone - Verrerie Villeurbannaise

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Safe lab setup help required - carbon treatment under .

Safe lab setup help required - carbon treatment under .

Feb 20, 2013 · However using benzene is an issue for me because I'll be using the treated carbon after treatment 3 for adsorption studies of benzene, toluene and xylene from aqueous solutions. So the benzene (from treatment 2) will adsorb on the carbon surface and fill up the adsorption sites before I even use the carbon the adsorbtion study.

Diazepam (Valium) Synthesis

Diazepam (Valium) Synthesis

Dissolve 180 g 2-methylamino-5-chlorobenzophenone in 1 l dry dichloromethane, add 100 g chloroacetyl chloride over 1 h and reflux 10 h. Rotovap off the dichloromethane (dryness in the flask, end (60 °C, 20 torr). Dissolve 400 g hexamethylene tetramine (urotropine) in 3 l .

A General Photocatalytic Route to Prenylation - Rathnayake .

A General Photocatalytic Route to Prenylation - Rathnayake .

Prenylation of Aniline: A 12 × 75 mm borosilicate tube fitted with a rubber septum was charged with Eosin Y (0.6 m m, 0.6 mL in DMSO), aniline (0.12 mmol, 1 equiv.), t BuONO (0.24 mmol, 2 equiv.) and [(2‐methylbut‐3‐en‐2‐yl)sulfonyl]benzene (0.6 mmol, 5 equiv.). Then the tube was placed in a light bath and the lower portion of the .