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	hartrees
Energy at 0K	-760.579702
Energy at 298.15K
HF Energy	-760.579702
Nuclear repulsion energy	244.292711

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3373	3327	43.72
2	A'	944	931	83.18
3	A'	773	762	40.98
4	A'	668	659	24.76
5	A'	444	438	45.40
6	A'	299	294	8.50
7	A'	279	275	7.57
8	A'	180	178	4.32
9	A"	776	765	59.18
10	A"	298	294	9.83
11	A"	193	190	25.37
12	A"	75i	74i	86.15

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.186	0.002	0.000
O2	-0.570	1.652	0.000
O3	1.839	0.144	0.000
O4	-0.570	-0.849	1.426
O5	-0.570	-0.849	-1.426
H6	2.141	-0.816	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.6938	2.0297	1.7044	1.7044	2.4665
O2	1.6938		2.8423	2.8784	2.8784	3.6663
O3	2.0297	2.8423		2.9703	2.9703	1.0063
O4	1.7044	2.8784	2.9703		2.8521	3.0636
O5	1.7044	2.8784	2.9703	2.8521		3.0636
H6	2.4665	3.6663	1.0063	3.0636	3.0636

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	103.468	O2	Cl1	O3	99.120
O2	Cl1	O4	115.779	O2	Cl1	O5	115.779
O3	Cl1	O4	105.060	O3	Cl1	O5	105.060
O4	Cl1	O5	113.577

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

using model chemistry: PBEPBE/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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Number	Element	Mulliken
1	Cl	1.174
2	O	-0.346
3	O	-0.476
4	O	-0.366
5	O	-0.366
6	H	0.380

	x	y	z	Total
	1.279	-1.614	0.000	2.060
CHELPG
AIM
ESP

	x	y	z
x	6.669	-0.169	0.000
y	-0.169	6.355	0.000
z	0.000	0.000	5.763

<r²>	129.272
(<r²>)^1/2	11.370

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

using model chemistry: PBEPBE/6-31G

States and conformations

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