Acetal 缩醛 [化]乙缩醛, 乙缩醛二乙醇 acet yl- 乙酰 Acetylide 炔化物 acid 酸 Active hydrogen compounds 活泼氢化合物 Acyl azide 酰叠氮 Acyl chloride 酰氯 Acyl cyanide 酰腈 Acyl fluoride 酰氟 Acyl halide 酰卤 Acyl iodide 酰碘 Acyl peroxide 酰基过氧化物 Acyl rtomide 酰溴 Acyl tosylate 酰基对...
acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.
Novel fibers of N -acylchitosan and its cellulose composite prepared by spinning their aqueous xanthate solutions Novel fibers of N -acylchitosan and N -acylchitosan-cellulose composite were prepared. An aq. 14% NaOH solution of sodium N -acylchitosan xanthate [ O -(so... S Hirano,A Usu...
sodium sulfite to generate hydrogen-containing feed solution and release the feed solution, pH control release feed solution was 3.9-5.9; feed solution with a base (4) Step (3) release of neutralization to a pH of 8.0-10.0 just give in and fluid, wherein said base is NaOH or Na2CO3 solu...
NaClNa+, Cl−sodium chloride KIK+, I−potassium iodide CaSCa2+, S2−calcium sulfide CsBrCs+, Br−cesium bromide MgOMg2−, O2−magnesiumoxide In the formulas of ionic compounds, simple ions are represented by thechemical symbolfor the element: Cl means Cl−, Na means Na+, and ...
Sulfamoyl chloride (1) Chlorosulfonyl isocyanate (4 mL, 46 mmol) in 12 mL dry dichloromethane (DCM) was added to a 250 mL two-necked round bottom flask equipped with a drying tube and put under nitrogen. The flask was cooled to 0 °C and a solution of formic acid (1.7 mL, 46 mmol...
BAPO 3 (224.0 mg, 0.625 mmol) is dissolved in NaOH aq. (1.0 M, 6.4 mL). Dilution to 25 mL yields a clear, yellow solution containing 25 mM NaBAPO. This stock solution is stored at −20 °C or −80 °C until used. NaBAPO has been proven to be stable...
(1.7 g-0.0224 mol) with vigorous stirring. When no more carbon dioxide was evolved the suspension was cooled to 0° C. and precooled acetyl chloride (4.0 mL-0.056 mol) was added over the course of 15 min. The suspension was stirred at 0° C. for 8 hours, the solid was removed by...
17 " cyanuric chloride " 18 1-hydroxy-4,6-disulpho-naphthalene tetrachloropyrimidine yellowish-tinged red 19 2-hydroxy-3,6-disulpho-naphthalene 2,4,6-trifluoro-5-chloro-pyrimidine red 20 2-hydroxy-6-sulpho-naphthalene " scarlet 21 2-hydroxy-7-sulpho-naphthalene ...
Preparation of 3,4-diethylpyrrol 3a (R1 =R2 =Et) using LiX: A mixture of 2-methoxycarbonyl-3,4-diethylpyrrol 1b (1.0 g, 55 mmol) which was prepared in EXAMPLE 5, lithium chloride (2.4 g, 0.055 mol) and water (0.1 g, 6 mmol) in DMSO (25 mL) was de-aerated with argon for ...