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	hartrees
Energy at 0K	-755.898863
Energy at 298.15K	-755.902881
HF Energy	-755.346943
Nuclear repulsion energy	291.826469

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3597	3347	106.97
2	A'	1358	1263	233.56
3	A'	1241	1155	81.70
4	A'	1065	991	135.68
5	A'	806	750	191.74
6	A'	591	550	26.75
7	A'	575	535	37.72
8	A'	425	396	6.09
9	A"	1294	1204	290.29
10	A"	598	557	63.27
11	A"	442	411	22.31
12	A"	111	104	127.18

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.139	0.012	0.000
O2	-0.477	1.397	0.000
O3	1.494	0.081	0.000
O4	-0.477	-0.700	1.201
O5	-0.477	-0.700	-1.201
H6	1.873	-0.835	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4261	1.6347	1.4362	1.4362	2.1833
O2	1.4261		2.3707	2.4165	2.4165	3.2416
O3	1.6347	2.3707		2.4367	2.4367	0.9908
O4	1.4362	2.4165	2.4367		2.4016	2.6431
O5	1.4362	2.4165	2.4367	2.4016		2.6431
H6	2.1833	3.2416	0.9908	2.6431	2.6431

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	110.094	O2	Cl1	O3	101.307
O2	Cl1	O4	115.183	O2	Cl1	O5	115.183
O3	Cl1	O4	104.838	O3	Cl1	O5	104.838
O4	Cl1	O5	113.462

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

using model chemistry: CID/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 HClO4 (perchloric acid)

using model chemistry: CID/3-21G*

States and conformations

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