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	hartrees
Energy at 0K	-757.412002
Energy at 298.15K	-757.415767
HF Energy	-757.412002
Nuclear repulsion energy	286.484583

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3427	3287	63.20
2	A'	1293	1241	177.73
3	A'	1169	1121	68.08
4	A'	996	956	108.75
5	A'	705	676	162.56
6	A'	530	509	23.83
7	A'	509	488	10.98
8	A'	374	359	6.11
9	A"	1234	1184	218.96
10	A"	535	513	37.28
11	A"	386	370	24.28
12	A"	136	131	108.05

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.148	0.008	0.000
O2	-0.485	1.417	0.000
O3	1.533	0.100	0.000
O4	-0.485	-0.715	1.221
O5	-0.485	-0.715	-1.221
H6	1.890	-0.839	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4485	1.6837	1.4587	1.4587	2.2067
O2	1.4485		2.4099	2.4569	2.4569	3.2753
O3	1.6837	2.4099		2.4957	2.4957	1.0040
O4	1.4587	2.4569	2.4957		2.4424	2.6733
O5	1.4587	2.4569	2.4957	2.4424		2.6733
H6	2.2067	3.2753	1.0040	2.6733	2.6733

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	107.681	O2	Cl1	O3	100.330
O2	Cl1	O4	115.364	O2	Cl1	O5	115.364
O3	Cl1	O4	104.936	O3	Cl1	O5	104.936
O4	Cl1	O5	113.685

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

using model chemistry: B3PW91/3-21G*

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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Number	Element	Mulliken
1	Cl	1.342
2	O	-0.389
3	O	-0.539
4	O	-0.408
5	O	-0.408
6	H	0.401

	x	y	z	Total
	1.926	-1.734	0.000	2.592
CHELPG
AIM
ESP

	x	y	z
x	3.648	-0.270	0.000
y	-0.270	3.735	0.000
z	0.000	0.000	3.269

<r²>	98.592
(<r²>)^1/2	9.929

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

using model chemistry: B3PW91/3-21G*

States and conformations

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