NITROUS ACID* - (7782-77-6)

Introduction

Name: nitrous acid*; hydroxidooxidonitrogen
* IUPAC
CAS Number: 7782-77-6
Chemical Formula: HNO2
Molar Mass: 47.01344 g
State of Matter: pale blue solution
Mass Percent: H 2.1439 %; N 29.792 %; O 68.063 % 

Classification

• inorganic

Bonding

Thermochemistry

ΔHf° (g cis): -18.3 kcal/mol 1 = -76.57 kJ/mol
ΔHf° (g trans): -18.8 kcal/mol 1 = -78.66 kJ/mol
S° (g cis): 59.59 cal/(mol•K) 2 = 249.32 J/(mol•K)
S° (g trans): 59.55 cal/(mol•K) 2 = 249.16 J/(mol•K)
ΔGf° (g cis): -10.0 kcal/mol 3 = -41.84 kJ/mol
ΔGf° (g trans): -10.5 kcal/mol 3 = -43.93 kJ/mol

Reactions

Balz-Schiemann reaction from the production of fluorobenzene from aniline: 4


For More Information

Sources

(1) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(2) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(3) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(4) - Balz, Günther and Schiemann, Günther. Ber. 5, 1186–1190 (1927)