Cyclohexanone infrared spectrum

Infrared spectrum, benzaldehyde, 730 butanoic acid, 771 cyclohexane., 436 cyclohexanol, 633 cyclohexanone, 730 cyclohexene. 436 cyclohexylamine, 952 diethyl ether, 671 ethanol, 421 hexane. 424 1-hexene, 424 1-hexyne, 424 phenol, 633... 

Fraction 1 was found to have the same retention time as that of authentic cyclohexanone, and the infrared spectrum showed a strong absorption band at 1720 cm."1 (C=0). The 2,4-dinitrophenylhydrazone derivative was prepared, and a mixed melting point with an authentic sample was not depressed, m.p., 156°-157°C. [literature value 160.2°C. 

Imaging studies were done on copolymers prepared by the polymer modification route because of the availability of the precursor polymers of various molecular weights. The protected copolymers were compounded with triphenylsulfonium hexafluoroantimonate (13% w/w) in cyclohexanone. One micron thick films were spin coated on NaCl plates, baked at 140°C for 5 minutes to expel solvent and then subjected to infrared spectroscopic analysis before and after exposure. Exposure to 18 mJ/cm2 at 254 nm caused no change in the infrared spectrum. However, when the films were baked at 140°C for 120 sec. following exposure, deprotection was quantitative based on loss of the characteristic carbonate C = O absorption and... 

Figure 7. High pressure infrared spectrum in THF solution of PPN+W(C0)50Ac- (a)/cyclohexanone (b) under 660 psig of H2 initial loading. (1) Initial spectrum 0.01 M PPN W(C0)5 (OAc) /0.2 M cyclohexanone in THF at 25°C/660 psig of H2. (2) Spectrum after...

The biosynthesis and chemistry of alkaloids have been discussed in a recent book on natural products (Hendrickson, 1965). Hendrickson has pointed out the important contributions made to structural chemistry by instrumental methods of analysis such as UV, IR, NMR, and ORD spectroscopy. One of the alkaloids discussed in which reference to the use of infrared spectroscopy was made was vindoline (CIII) (a compound isolated from periwinkles Vinca rosea in a search for anticancer agents). Dihydrovindoline hydrochloride on mild pyrolysis yielded a ketone C21H28-N2O2. The infrared spectrum of this compound showed absorption at 1709cm", which indicated a cyclohexanone. This result was used, together with other information, in determining the total structure. 

In all cases, the copolymers are essentially equimolar regardless of the composition of the monomer feed, and the various copolymerization conditions serve only to cause variations of the copolymer microstructure. For example, the infrared spectrum of a copolymer prepared at 80°C, using -butyl peroxypivalate in cyclohexanone solvent, showed approximately 85-90% cis-1, units.In contrast, the infrared spectrum of a copolymer prepared in benzene solvent at 60°C with AIBN has approximately 74% cis-1,4 units. A homopolymer of butadiene, prepared under the same conditions, has approximately 62% trans-1,4 residues. 

Infrared Analysisi A Comparison Reactant and Product, The key absorption bands to examine in the spectrum of cyclohexanone occur at 3420,3000-2850, 1715, and 1425 cm . The lack of significant absorption between 3100-3000 and 1400-1350 cm also should be noted. The sharp weak band at 3420 cm is not a fundamental vibration (not O—H or N—FI stretching), but arises from the first... 

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