Toluene infrared spectrum

In a 250 ml Erlenmeyer flask covered with aluminum foil, 14.3 g (0.0381 mole) of 17a-acetoxy-3j5-hydroxypregn-5-en-20-one is mixed with 50 ml of tetra-hydrofuran, 7 ml ca. 0.076 mole) of dihydropyran, and 0.15 g of p-toluene-sulfonic acid monohydrate. The mixture is warmed to 40 + 5° where upon the steroid dissolves rapidly. The mixture is kept for 45 min and 1 ml of tetra-methylguanidine is added to neutralize the catalyst. Water (100 ml) is added and the organic solvent is removed using a rotary vacuum evaporator. The solid is taken up in ether, the solution is washed with water and saturated salt solution, dried over sodium sulfate, and then treated with Darco and filtered. Removal of the solvent followed by drying at 0.2 mm for 1 hr affords 18.4 g (theory is 17.5 g) of solid having an odor of dihydropyran. The infrared spectrum contains no hydroxyl bands and the crude material is not further purified. This compound has not been described in the literature. 

In 1972 Van Tamelen and co-workers reported that the reduction of a toluene solution of Cp2TiCl2 by sodium under an argon atmosphere over a period of 6-10 days led to the formation of an active titanocene postulated as (Cp2Ti)1 2 based on its visible and infrared spectrum. Exposure of (Cp2Ti)t 2 in toluene to CO converted it to Cp2Ti(CO)2 (1) (23). 

Fig. 3.40 Infrared spectrum of toluene-/ -sulphonamide recorded as a Nujol mull.

Carboxy-3,4-dibromodecanoic acid. This reaction should be carried out in a fume cupboard. Place 5.3 g (0.025 mol) of 3-carboxydec-3-enoic acid, 6.0 g (0.038 mol) of bromine and 60 ml of carbon tetrachloride in a 100-ml round-bottomed flask equipped with a magnetic stirrer and reflux condenser. Irradiate the stirred mixture with a 100-watt lamp for 6 hours the dibromide forms and precipitates out during this period. Filter the product with suction and wash thoroughly with hexane. The yield of 3-carboxy-3,4-dibromodecanoic acid is 7.9 g (85%). The acid can be recrystallised from toluene, m.p. 142— 143 °C. The infrared spectrum shows absorptions at 3400-2400cm-1 (O—H stretch of C02H) and 1730 cm-1 (0=0). 

The black solid (VIII) is converted into the green fulvalene titanocene (V) at 110°C, and also reacts with H2, N, and alkenes 42), as do the active metastable forms of titanocene (30). With hydrogen, (VIII) yields a green-gray precipitate, formulated as [(CsHsMCsH TU] H2, from toluene solution. The infrared spectrum and deuteration studies show this solid to contain a Ti-H bond, probably with the hydrogen in a bridging position, as either... 

The reaction with C02, as reported for the dried aminosilane polymer also occurs with immobilized aminosilane molecules. Culler43 reported that approximately half of the amine groups are reacting with C02 when silica samples modified with APTS in aqueous solution, are dried in air. Comparison with AEAPTS and a triaminosilane showed that only primary amines react with C02. The reaction product is evidenced by FTIR bands at 1630, 1575, 1488 and 1332 cm 1. Also after modification in dry conditions and drying at room temperature in humid air, the reaction with C02 may be observed. Characteristic infrared bands appear upon modification at high concentrations of APTS. Figure 9.32 shows the infrared spectrum of dry silica, modified with a 10% APTS/toluene solution, after air drying for 30 minutes. 

Urethanation with 10% HMDI. The infrared spectrum of the EVAL film urethanated with 10% HMDI in toluene is given in the curve c of Figure 5. As is obvious, the spectrum has the peak characteristic of urethane linkage around 1700 crn-- This is in marked contrast with that of film urethanated with 100% HMDI. Presence of urethane bonds in such a conventional infrared spectrum strongly indicates that urethanation has taken place not only at the surface but also in the interior of the film. This is highly reasonable because toluene is... 

The red-violet crystalline compound, which decomposes at 195°, is fairly stable to air it is soluble in benzene, toluene, and THF (tetrahydrofuran). Its solutions slowly react with air. Its infrared spectrum, determined in Nujol mull, shows a broad, weak absorption band at 1955 cm-1, assignable to the Fe—H stretch. When the complex is treated with solid iodine at 60°, about 0.5 mol of hydrogen is evolved per mole of complex. On treatment with iodine in benzene solution at room temperature, only 20-40% of the stoichiometric amount of hydrogen is evolved. 

Hydridobis[ s-vinylenebis(diphenylphosphine)] cobalt(l) is a red crystalline solid that is unstable in air both in the solid state and in solution. The complex is soluble in tetrahydrofuran (9.2 X 10-3 mole/L, at 20°), toluene (10.2 X 10 3 mole/L), chloroform (6.3 X 10-3 mole/L), dichloromethane (1.6 X 10-3 mole/ L), and benzene (8.4 X 10-3 mole/L). It is insoluble in ethanol, diethyl ether, acetone, and pentane. The infrared spectrum in Nujol mull shows a band at 1885 (m) cm-1, attributable to the Co-H stretching vibration. 

The infrared spectrum (C6H6 solution) shows inr H at 2070 cm.-1 and vco at 1930 cm.-1. The H n.m.r. spectrum in CDCls shows the aromatic protons at 3.0r and the CH3 protons at 7. 66t in the ratio of 50 3 as calculated for 1 mole of toluene in the complex the Ir—H resonance is observed at 20.7r as a quartet, Jp h = 22 Hz. The unsolvated complex has been shown to be isomorphous with the rhodium analog which has a trigonal bipyramidal structure with the phosphine ligands at equatorial positions.8... 

Bis (benzoylacetonato) diphenyltin (IV) is a white solid, which is soluble in benzene and toluene and only slightly soluble in petroleum ether. The infrared spectrum (KBr disk) has peaks centered at 1570,1550,1520, and 1374 cm.. The ultraviolet absorption spectrum (benzene) has a band centered at 308 mpi (e = 4.42 X 10 ). Attempts to effect resolution of optical isomers by a chromatographic technique (n-lactose) were unsuccessful, and it has been suggested that the phenyl groups are in trans positions. ... 

This square planar nickel(ll) complex is stable in air in the solid state, but solutions of the complex react in air to produce oxidation products of unknown composition. For this reason, manipulations of the complex are best performed in an inert atmosphere. The complex is a nonelectrolyte and is soluble in most common organic solvents, including diethyl ether, but not in water. The infrared spectrum of the complex contains an intense broad band in the double-bond region centered at 1610 cm. The electronic spectrum of a solution of the compound in toluene contains several bands 17.9 (e = 107), 23.0 (e 1600), 24.5 (e 4600), 25.9 (e 2700), and 29.4 kK (e 5500). The PMR spectrum of the complex in CDCI3 contains four bands as expected singlet methyl at 5 1.88, methylene at 6 3.13, vinyl doublet at 6 4.51, and a second vinyl doublet at 5 6.63. The vinyl protons of the charged chelate ring are coupled, J = 3 Hz. 

In an attempt to prepare polycyclopentadiene which would be stable in toluene solution, the polymer was hydrogenated over a platinum oxide catalyst in a Parr bomb immediately after the completion of the polymerization reaction. Infrared analysis indicated the presence of residual unsaturation and the polymer became insolubilized on standing. An attempted copolymerization of cyclo-pentadiene with propylene gave a product whose infrared spectrum indicated the presence of C-methyl groups but which was still insoluble in toluene. No attempt was made to determine whether copolymerization had occurred. 

The product is an extremely air- and moisture-sensitive red solid that can be stored for months in the absence of air and moisture.10 It is soluble in aromatic hydrocarbons. NMR (toluene-d%) and infrared spectrum have been described.10... 

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