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	hartrees
Energy at 0K	-203.854989
Energy at 298.15K	-203.857163
HF Energy	-203.453071
Nuclear repulsion energy	65.534880

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3450	3294	18.96
2	A'	1315	1256	35.40
3	A'	1106	1056	104.93
4	A'	826	789	177.32
5	A'	549	524	47.20
6	A"	523	500	124.23

Atom	x (Å)	y (Å)
H1	-1.830	-0.130
O2	-0.956	-0.615
N3	0.000	0.563
O4	1.185	0.140

	H1	O2	N3	O4
H1		0.9994	1.9567	3.0267
O2	0.9994		1.5172	2.2701
N3	1.9567	1.5172		1.2581
O4	3.0267	2.2701	1.2581

All results from a given calculation for HNO₂ (Nitrous acid)

using model chemistry: MP2=FULL/3-21G

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for HNO2 (Nitrous acid)

using model chemistry: MP2=FULL/3-21G

States and conformations

All results from a given calculation for HNO₂ (Nitrous acid)