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	hartrees
Energy at 0K	-749.933767
Energy at 298.15K
HF Energy	-749.933767
Nuclear repulsion energy	208.646157

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	4152	3390	39.74
2	A'	1553	1268	19.44
3	A'	953	778	40.51
4	A'	216	176	28.35
5	A'	158	129	8.42
6	A'	98	80	4.32
7	A'	65	53	0.08
8	A'	33	27	0.50
9	A"	201	164	48.79
10	A"	137	112	1.83
11	A"	18	15	0.00
12	A"	228i	186i	104.12

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.197	0.172	0.000
O2	-0.441	2.509	0.000
O3	1.543	-0.010	0.000
O4	-0.441	-1.369	1.628
O5	-0.441	-1.369	-1.628
H6	1.597	-1.014	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		2.3501	1.7498	2.2543	2.2543	2.1513
O2	2.3501		3.2073	4.2057	4.2057	4.0709
O3	1.7498	3.2073		2.9036	2.9036	1.0053
O4	2.2543	4.2057	2.9036		3.2552	2.6326
O5	2.2543	4.2057	2.9036	3.2552		2.6326
H6	2.1513	4.0709	1.0053	2.6326	2.6326

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	99.086	O2	Cl1	O3	101.942
O2	Cl1	O4	131.949	O2	Cl1	O5	131.949
O3	Cl1	O4	92.086	O3	Cl1	O5	92.086
O4	Cl1	O5	92.436

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

using model chemistry: HF/STO-3G

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	0.013
2	O	-0.041
3	O	-0.111
4	O	-0.062
5	O	-0.062
6	H	0.263

	x	y	z	Total
	1.839	-1.454	0.000	2.344
CHELPG
AIM
ESP

	x	y	z
x	2.393	-0.455	0.000
y	-0.455	2.302	0.000
z	0.000	0.000	1.084

<r²>	169.546
(<r²>)^1/2	13.021

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

using model chemistry: HF/STO-3G

States and conformations

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