3774. Ethyl tert-Butyl Ether

Nomenclature

CAS number: 637-92-3
2-Ethoxy-2-methylpropane; tert-butyl ethyl ether; ethyl tert-butyl oxide; 1,1-dimethylethyl ethyl ether; ethyl 1,1-dimethylethyl ether; ETBE.
C6H14O; mol wt 102.17.
C 70.53%, H 13.81%, O 15.66%.

Description and references

Prepn J. U. Nef, Ann. 309, 126 (1899). Synthesis: J. F. Norris, G. W. Rigby, J. Am. Chem. Soc. 54, 2088 (1932). Physical properties: T. W. Evans, K. R. Edlund, Ind. Eng. Chem. 28, 1186 (1936). Thermal decomposition: N. J. Daly, C. Wentrup, Aust. J. Chem. 21, 1535 (1968). Brief review focusing on use as gasoline additive: M. Iborra et al., Chemtech 18, 120-122 (1988).

Chemical structure

Properties

fp -94.0°. bp760 72.8° (Evans, Edlund). Also reported as bp760 73.1° (Norris, Rigby). nD25 1.3728. nD20 1.3760. d415 0.7456; d420 0.7404; d425 0.7353, d430 0.7300. Vapor pressure at 25°: 130 mm Hg. Heat vaporization: 74.3 cal/g. Specific heat (liquid) at 25°: 0.51 cal/g/°C. Surface tension at 24°: 19.8 dynes/cm. Flammable. Soly in water (20°): 1.2 g/100 g soln. Soly of water in compound (20°): 0.5 g/100 g soln.

Use

Gasoline additive.