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	hartrees
Energy at 0K	-759.291940
Energy at 298.15K
HF Energy	-758.711403
Nuclear repulsion energy	252.228317

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3439	3291	18.23
2	A'	1016	972	139.34
3	A'	794	760	114.30
4	A'	723	692	80.94
5	A'	463	443	256.49
6	A'	356	340	15.96
7	A'	306	293	12.13
8	A'	221	211	3.65
9	A"	785	751	138.45
10	A"	363	347	25.19
11	A"	235	225	34.61
12	A"	62i	59i	88.25

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.180	0.007	0.000
O2	-0.558	1.596	0.000
O3	1.793	0.116	0.000
O4	-0.558	-0.811	1.378
O5	-0.558	-0.811	-1.378
H6	2.112	-0.832	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.6329	1.9762	1.6469	1.6469	2.4411
O2	1.6329		2.7775	2.7738	2.7738	3.6084
O3	1.9762	2.7775		2.8785	2.8785	1.0001
O4	1.6469	2.7738	2.8785		2.7567	3.0048
O5	1.6469	2.7738	2.8785	2.7567		3.0048
H6	2.4411	3.6084	1.0001	3.0048	3.0048

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	105.457	O2	Cl1	O3	100.202
O2	Cl1	O4	115.503	O2	Cl1	O5	115.503
O3	Cl1	O4	104.849	O3	Cl1	O5	104.849
O4	Cl1	O5	113.636

All results from a given calculation for HClO₄ (perchloric acid)

using model chemistry: MP2/6-31G

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 HClO4 (perchloric acid)

using model chemistry: MP2/6-31G

States and conformations

All results from a given calculation for HClO₄ (perchloric acid)