DIMETHYL ETHER - (115-10-6)

Introduction

Name: dimethyl ether; methoxymethane; wood ether
* IUPAC
CAS Number: 115-10-6
Chemical Formula: C2H6O or CH3OCH3
Molar Mass: 46.06844 g
Mass Percent: C 52.142 %; H 13.127 %; O 34.729 % 
Isomers:  ethanol*

Classification

• organic • ether

Uses/Function

• "...a chief solvent for organic substances, an anesthetic." 1

• "Aerosol propellant; alternative diesel fuel; chemical intermediate." 2

Physical Properties

Melting Point:*
-141.5°C 3 = 131.65 K = -222.7°F
Boiling Point:*
-24.8°C 3 = 248.35 K = -12.64°F

* - 1 atm pressure

Solubility

Qualitative:
insoluble:  3
very soluble:  • 3
miscible:  3

Bonding

Double Bonds: 0
Triple Bonds: 0
Sigma Bonds: 8
Pi Bonds: 0
Total: 8
Carboxyl Groups: 0
Hydroxyl Groups: 0
Hybridization: carbon and oxygen are both sp3 hybridized

Thermochemistry

ΔHf° (g): -43.99 kcal/mol 4 = -184.05 kJ/mol
S° (g): 63.83 cal/(mol•K) 5 = 267.06 J/(mol•K)
ΔGf° (g): -26.99 kcal/mol 6 = -112.93 kJ/mol
The heat of combustion is the amount of heat released when one mole of a substance undergoes combustion according to the general reaction equation:
CxHyOz + 0.25(4x+y-2z) O2 (g) → x CO2 (g) + 0.5y H2O (ℓ)

ΔHcomb° (g): -349.055 kcal = -1460.45584 kJ

For More Information

Sources

(1) - Brownlee, Raymond B., Fuller, Robert W., and Whitsit, Jesse E. Elements of Chemistry; Allyn and Bacon: Boston, Massachusetts, 1959; p 322.
(2) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 6096.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 3-207.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:74.
(5) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:74.
(6) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:74.