TETRAETHYL LEAD - (78-00-2)

Introduction

Name: tetraethyl lead; TEL; tetraethylplumbane
* IUPAC
CAS Number: 78-00-2
Chemical Formula: C8H20Pb or (CH3CH2)4Pb
Molar Mass: 323.4444 g
State of Matter: colorless liquid
Mass Percent: C 29.706 %; H 6.2325 %; Pb 64.060 % 

Classification

• organic

Uses/Function

• "Once used as a gasoline additive to improve fuel efficiency, but now banned because of its inactivation of auto catalytic converters. Major source of lead as a toxic air pollutant." 1

• "the widespread use of tetraethyl lead (C2H5)4Pb, as an antinknock agent in gasoline has increased the lead levels in our environment in this century." 2

• "The use of tetraethyllead in gasoline and the use of lead compounds in paints are being phased out because of the metal's toxicity." 3

Bonding

Thermochemistry

ΔHf° (ℓ): 12.7 kcal/mol 4 = 53.14 kJ/mol
ΔHf° (g): 26.3 kcal/mol 4 = 110.04 kJ/mol
S° (ℓ): 112.92 cal/(mol•K) 5 = 472.46 J/(mol•K)
ΔGf° (ℓ): 80.4 kcal/mol 6 = 336.39 kJ/mol

For More Information

Sources

(1) - Silberberg, Martin S. Chemistry: The Molecular Nature of Matter and Change, 4th ed.; McGraw-Hill: New York, 2006; p 575.
(2) - Zumdahl, Steven S. Chemistry, 4th ed.; Houghton Mifflin: Boston, 1997; p 890.
(3) - Ebbing, Darrell D. General Chemistry 3rd ed.; Houghton Mifflin Company: Boston, MA, 1990; p 703.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:90.
(5) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:90.
(6) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:90.