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	hartrees
Energy at 0K	-78.468800
Energy at 298.15K	-78.472607
HF Energy	-77.578936
Nuclear repulsion energy	112.089718

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3647	3463	92.51
2	A'	1309	1243	263.24
3	A'	1183	1123	107.50
4	A'	1056	1002	70.58
5	A'	661	628	241.16
6	A'	514	488	22.63
7	A'	496	471	6.13
8	A'	367	348	4.45
9	A"	1249	1186	328.00
10	A"	517	491	32.19
11	A"	381	361	25.19
12	A"	208	197	84.66

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.158	0.009	0.000
O2	-0.491	1.435	0.000
O3	1.575	0.099	0.000
O4	-0.491	-0.724	1.236
O5	-0.491	-0.724	-1.236
H6	1.866	-0.848	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4644	1.7359	1.4752	1.4752	2.1983
O2	1.4644		2.4601	2.4879	2.4879	3.2814
O3	1.7359	2.4601		2.5444	2.5444	0.9912
O4	1.4752	2.4879	2.5444		2.4729	2.6642
O5	1.4752	2.4879	2.5444	2.4729		2.6642
H6	2.1983	3.2814	0.9912	2.6642	2.6642

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	104.073	O2	Cl1	O3	100.135
O2	Cl1	O4	115.633	O2	Cl1	O5	115.633
O3	Cl1	O4	104.527	O3	Cl1	O5	104.527
O4	Cl1	O5	113.895

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

using model chemistry: MP2/CEP-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/CEP-31G*

States and conformations

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