Oil, green

Chemical Designations-5 nonyms Anthracin Green Oil Paranaphtalene Chemical Formula C,4H,g. Observable Characteristics - Physical State (as normally shipped) Solid Color White to yellow Odor. Weak aromatic. 

GrUn-malz, n. green malt, -mist, m. green manure, -ol, n. green oil (anthracene oil), -rost, m. verdigris, griinrostig, a. (a)eruginous. 

Note 5). The layers are separated (Note 6) the aqueous layer is returned to the separatory funnel and covered with 200 cc. of ether. After 100 cc. of 10 per cent sodium hydroxide has been added, the mixture is vigorously shaken, and then the aqueous layer is removed and extracted with another 200-cc. portion of ether. The two ether extractions, one with addition of sodium hydroxide and one without, are repeated. The second half of the bisulfite solution is subjected to the same treatment as the first half, and all the ether extracts are combined (Note 7) and dried over anhydrous sodium sulfate. The ether is removed on the water bath, and the residual yellow-green oil is distilled under reduced pressure, yielding 120-130 g. (45-49 per cent of the theoretical amount, based upon 210 g. of pure citral) of pale yellow pseudoionone, boiling at 114-116°/2 mm. (124-126°/4 mm.). 

The temperature of the potassium hydroxide solution should not he above 35° when used. The submitters report the isolation of 15-20 g. (9-12%) of potassium 1-nitropropylnitronate from the cooled extract. The checkers, having been advised that this product is a hazardous explosive, discarded the warm alkaline extract. If 1,1-dinitropropane is not desired (its preparation has been described 2), it is recommended that it be extracted as its more soluble sodium salt by washing the green oil with sodium hydroxide solution rather than potassium hydroxide solution. 

After the green oil has been separated, it is washed with 75 ml. of a warm (( aulionl Note J) 20% solution of potassium hydroxide in water... 

Synonyms AI3-00105 Anthracin BRN 1905429 CCRIS 767 EINECS 204-371-1 Green oil NSC 7958 Paranaphthalene Tetra olive N2G. 

Synonyms chromic oxide chromia chromium sesquioxide green cinnabar chrome green chrome oxide green oil green leaf green ultramarine green Cl 77288... 

Approximately 0.5 g (1.7 mmole) of CrBr3, as the dark-green oil derived in Section A, is added dropwise to 15 mL of colorless ethylenediamine (reagent grade). An exothermic reaction occurs, following which the mixture is allowed to cool to room temperature, resulting in the formation of yellow crystals. These are collected, washed with diethyl ether (2 X 25 mL), and dried in vacuo. Yield 0.74 g (1.55 mmole, 90%). Anal. Calcd. for C6HMN6CrBr3 Cr, 11.1 Br, 51.2. Found Cr, 11.1 Br, 51.4%. 

The properties of these compounds have been discussed previously.2 The complexes are green oils or solids readily soluble in organic solvents. They are stable in air for short periods of time but are best stored under nitrogen at temperatures below 0°. The characteristic IR stretching frequencies for these compounds are listed below. 

Attempted Reaction of (Me4N) [Cr(HO-A2] with Acetyl Chloride in Acetonitrile. In 200 ml. of acetonitrile were placed 0.50 gram (0.00105 mole) of (Me4N) [Cr(HO-A)2], 1 ml. of pyridine, and 18 drops (excess) of acetyl chloride. The solution was warmed and within a few minutes the color changed from red to green. On evaporation a green oil was obtained, the infrared spectrum of which gave no indication of the presence of ester. 

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