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nh 3 + 3 c 2 h 5 oh → n(c 2 h 5) 3 + 3 h 2 o The pK a of protonated triethylamine is 10.75, [ 4 ] and it can be used to prepare buffer solutions at that pH. The hydrochloride salt , triethylamine hydrochloride (triethylammonium chloride), is a colorless, odorless, and hygroscopic powder, which decomposes when heated to 261 °C.
The starting material (S)-4-hydroxy-3-methyl-2-(2-propynyl)-2-cyclopenten-1-one (7) is also commercially available as the alcohol moiety of ETOC. Tetrakis(triphenylphosphine)palladium(0) , copper(I) iodide , triethylamine , and vinyl bromide are added to ( 7 ) to add two more carbons and form ( 8 ).
The check digit is found by taking the last digit times 1, the preceding digit times 2, the preceding digit times 3 etc., adding all these up and computing the sum modulo 10. For example, the CAS number of water is 7732-18-5: the checksum 5 is calculated as (8×1 + 1×2 + 2×3 + 3×4 + 7×5 + 7×6) = 105; 105 mod 10 = 5.
917–58–8 KC 3 H 5 O 2: potassium propionate: 327–62–8 KC 3 H 5 S 2 O: potassium xanthogenate: 140–89–6 KC 3 H 7 NS 2: potassium dimethyldithiocarbamate: 128–03–0 KC 4 H 5 O 6: potassium bitartrate: 868–14–4 KC 7 H 5 O 2: potassium benzoate: 582–25–2 KCl: potassium chloride: 7447–40–7 KClO 3: potassium chlorate: 3811 ...
The crystal structure called Form I is a disappearing polymorph that cannot be produced by researches anymore while Form II and III still exist. [6] The reason for this is that Form I is converted to another polymorph upon contact with a seed crystal and most places are contaminated with tiny amounts of Form II or III that are enough to prevent any viable amounts of Form I to be produced.
A number of derivatives from this class have been investigated for medical ... CAS number 2-phenylmorpholine: ... 1218345-44-8 2-phenyl-3,6-dimethylmorpholine ...
2,2-Dichloro-1,1,1-trifluoroethane can be produced by reacting tetrachloroethylene with hydrogen fluoride in the gas phase. This is an exothermic reaction and requires a catalyst: This is an exothermic reaction and requires a catalyst:
[3] Norbornadiene is reactive in cycloaddition reactions. Norbornadiene is also the starting material for the synthesis of diamantane [4] and sumanene and it is used as an acetylene transfer agent for instance in reaction with 3,6-di-2-pyridyl-1,2,4,5-tetrazine. [5]