A QO* CHEMICALS BULLETIN
NEW QO DEVELOPMENT CHEMICALS QO® D i h y d r o p y r a n H2 H,C
H2C
QO® M e t h y l t e t r a h y d r o f u r a n H,C-
CH,
H2C
CH-CH3
CH
CH
QO Dihydropyran is a colorless, mobile liquid of etherlike odor; it is very reactive, the activity is centered around the double bond. Alcohols add readily to the double bond in the presence of acids to give an acetal from which the alcohol can be regenerated. This gives a useful method of protecting the alcohol group during reaction. Dihydropyran also exhibits properties of a vinyl ether. Bulletin 137 describes many more reactions.
QO Methyltetrahydrofuran is a cyclic ether useful in organic synthesis, and may also have value as a reaction solvent. It is a colorless, mobile liquid of ether-like odor. In water it has the property of inverse solubility—that is, solubility increases with a decrease in temperature. Request Bulletin 136.
Physical Properties BOILING POINT, ° C . ( 7 6 0 m m ) Pure C o m p o u n d FREEZING POINT, °C SPECIFIC GRAVITY, 20/4°C REFRACTIVE INDEX, n25/D FLASH POINT, °F (Tag closed c u p ) SOLUBILITY
84.3 —70
0.927. 1.4380.
1.6(25°C) 0.5(25°C)
g./100g. H20
80.2 — 136 0.854 1.4025 12
15.1(20°C)
g. H 2 O / 1 0 0 g . c h e m i c a l WATER AZEOTROPE % water VAPOR PRESSURE, m m . of H g
9.8(b.71-2°C>.
5.3(20°C)
at 0° 10 20 30 40 50 60 70
34.9. 57.0. 148.0... 302.0::] 600.00.'
.37.8 .64.5 ..102 .165 .248 .366 .536
These chemicals are available in cans and 55 gallon drums.
The QuakerOatsCompany CHEMICALS
DIVISION
337Y The Merchandise Mart, Chicago 5 4 , Illinois Room 537V, 120 W a l l Street, N e w York 5 , N e w York Room 437V, 48 S.E. Hawthorne Blvd., Portland 1 4 , Oregon Circle Nos. 36, 37 on Readers' Service Card 88 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
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