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	hartrees
Energy at 0K	-755.983205
Energy at 298.15K	-755.987105
HF Energy	-755.343388
Nuclear repulsion energy	288.913409

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3456	3305	57.73
2	A'	1329	1271	209.86
3	A'	1216	1163	81.92
4	A'	1038	993	112.16
5	A'	744	712	187.64
6	A'	567	543	31.12
7	A'	544	520	16.46
8	A'	403	386	6.00
9	A"	1266	1211	270.23
10	A"	574	549	53.13
11	A"	419	401	23.13
12	A"	115	110	111.22

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.146	0.010	0.000
O2	-0.482	1.407	0.000
O3	1.519	0.089	0.000
O4	-0.482	-0.706	1.211
O5	-0.482	-0.706	-1.211
H6	1.880	-0.845	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4367	1.6665	1.4468	1.4468	2.1987
O2	1.4367		2.3959	2.4359	2.4359	3.2632
O3	1.6665	2.3959		2.4701	2.4701	1.0010
O4	1.4468	2.4359	2.4701		2.4224	2.6576
O5	1.4468	2.4359	2.4701	2.4224		2.6576
H6	2.1987	3.2632	1.0010	2.6576	2.6576

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	108.438	O2	Cl1	O3	100.818
O2	Cl1	O4	115.294	O2	Cl1	O5	115.294
O3	Cl1	O4	104.788	O3	Cl1	O5	104.788
O4	Cl1	O5	113.682

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

using model chemistry: CCD/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: CCD/3-21G*

States and conformations

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