2-METHYLBUTANE - (78-78-4)

Introduction

Name: 2-methylbutane; isopentane; methylbutane
* IUPAC
CAS Number: 78-78-4
Chemical Formula: C5H12
Molar Mass: 72.14878 g
State of Matter: colorless liquid
Mass Percent: C 83.235 %; H 16.764 % 
Isomers:  pentane*  •  2,2-dimethylpropane*

Classification

• organic • alkane

Physical Properties

Melting Point:*
-159.9°C 1 = 113.25 K = -255.82°F
Boiling Point:*
28°C 2 = 301.15 K = 82.4°F
27.8°C 1 = 300.95 K = 82.04°F
31°C 3 = 304.15 K = 87.8°F
Density (g/cm3):
0.6201 at 20°C 1
* - 1 atm pressure

Solubility

Qualitative:
very soluble:  3
miscible:  • • 3

Bonding

Double Bonds: 0
Triple Bonds: 0
Sigma Bonds: 16
Pi Bonds: 0
Total: 16
Carboxyl Groups: 0
Hydroxyl Groups: 0
Hybridization: all carbons are sp3
Bonding: polar covalent
Ionic Character: 10.61 %

For More Information

Sources

(1) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 3-95.
(2) - Estok, George K. Organic Chemistry: A Short Text; W.B. Saunders: Philadelphia, 1959; p 29.
(3) - Shriner, Ralph L., Fuson, Reynold C., and Curtin, David Y. The Systematic Identification of Organic Compounds, 4th ed.; John Wiley & Sons: New York, 1962; p 314.