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	hartrees
Energy at 0K	-761.353366
Energy at 298.15K	-761.356929
HF Energy	-761.353366
Nuclear repulsion energy	284.239013

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3574	3554	74.02
2	A'	1238	1231	143.89
3	A'	1121	1115	89.29
4	A'	935	930	69.54
5	A'	628	624	132.64
6	A'	501	499	16.36
7	A'	460	457	1.73
8	A'	351	349	4.35
9	A"	1153	1147	184.60
10	A"	506	503	14.33
11	A"	354	352	10.27
12	A"	134	133	72.81

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.157	0.006	0.000
O2	-0.493	1.417	0.000
O3	1.580	0.107	0.000
O4	-0.493	-0.716	1.224
O5	-0.493	-0.716	-1.224
H6	1.859	-0.836	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4504	1.7401	1.4605	1.4605	2.1849
O2	1.4504		2.4528	2.4592	2.4592	3.2575
O3	1.7401	2.4528		2.5449	2.5449	0.9838
O4	1.4605	2.4592	2.5449		2.4481	2.6547
O5	1.4605	2.4592	2.5449	2.4481		2.6547
H6	2.1849	3.2575	0.9838	2.6547	2.6547

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	103.133	O2	Cl1	O3	100.090
O2	Cl1	O4	115.307	O2	Cl1	O5	115.307
O3	Cl1	O4	105.000	O3	Cl1	O5	105.000
O4	Cl1	O5	113.877

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

using model chemistry: BLYP/6-31G(2df,p)

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	0.709
2	O	-0.205
3	O	-0.373
4	O	-0.221
5	O	-0.221
6	H	0.311

	x	y	z	Total
	1.511	-1.318	0.000	2.005
CHELPG
AIM
ESP

	x	y	z
x	5.013	-0.187	0.000
y	-0.187	4.796	0.000
z	0.000	0.000	4.515

<r²>	99.729
(<r²>)^1/2	9.986

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

using model chemistry: BLYP/6-31G(2df,p)

States and conformations

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