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	hartrees
Energy at 0K	-761.310341
Energy at 298.15K	-761.313984
HF Energy	-761.310341
Nuclear repulsion energy	284.301386

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3618	3472	91.08
2	A'	1288	1235	158.47
3	A'	1166	1119	122.30
4	A'	973	934	88.71
5	A'	672	645	154.24
6	A'	507	487	21.03
7	A'	483	463	4.32
8	A'	351	336	5.01
9	A"	1187	1139	234.15
10	A"	512	491	26.44
11	A"	357	343	19.19
12	A"	151	145	85.30

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.143	0.006	0.000
O2	-0.477	1.399	0.000
O3	1.503	0.106	0.000
O4	-0.477	-0.707	1.210
O5	-0.477	-0.707	-1.210
H6	1.847	-0.812	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4325	1.6499	1.4433	1.4433	2.1521
O2	1.4325		2.3650	2.4291	2.4291	3.2077
O3	1.6499	2.3650		2.4587	2.4587	0.9802
O4	1.4433	2.4291	2.4587		2.4197	2.6219
O5	1.4433	2.4291	2.4587	2.4197		2.6219
H6	2.1521	3.2077	0.9802	2.6219	2.6219

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	107.055	O2	Cl1	O3	99.979
O2	Cl1	O4	115.269	O2	Cl1	O5	115.269
O3	Cl1	O4	105.087	O3	Cl1	O5	105.087
O4	Cl1	O5	113.904

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

using model chemistry: TPSSh/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	1.482
2	O	-0.432
3	O	-0.608
4	O	-0.445
5	O	-0.445
6	H	0.447

	x	y	z	Total
	1.724	-1.511	0.000	2.292
CHELPG
AIM
ESP

	x	y	z
x	4.533	-0.171	0.000
y	-0.171	4.494	0.000
z	0.000	0.000	4.151

<r²>	99.977
(<r²>)^1/2	9.999

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

using model chemistry: TPSSh/6-31G*

States and conformations

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