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	hartrees
Energy at 0K	-757.100721
Energy at 298.15K
HF Energy	-757.100721
Nuclear repulsion energy	255.374890

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3379	3248	44.56
2	A'	1113	1070	69.65
3	A'	883	849	31.15
4	A'	730	702	41.35
5	A'	535	514	55.98
6	A'	353	340	15.01
7	A'	331	318	16.31
8	A'	223	214	4.71
9	A"	887	852	47.14
10	A"	360	346	26.42
11	A"	249	239	18.42
12	A"	207i	199i	91.66

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.169	0.009	0.000
O2	-0.536	1.603	0.000
O3	1.720	0.099	0.000
O4	-0.536	-0.806	1.376
O5	-0.536	-0.806	-1.376
H6	1.986	-0.875	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.6353	1.8916	1.6416	1.6416	2.3297
O2	1.6353		2.7116	2.7749	2.7749	3.5358
O3	1.8916	2.7116		2.7940	2.7940	1.0097
O4	1.6416	2.7749	2.7940		2.7530	2.8743
O5	1.6416	2.7749	2.7940	2.7530		2.8743
H6	2.3297	3.5358	1.0097	2.8743	2.8743

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	102.547	O2	Cl1	O3	100.244
O2	Cl1	O4	115.729	O2	Cl1	O5	115.729
O3	Cl1	O4	104.296	O3	Cl1	O5	104.296
O4	Cl1	O5	113.960

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	1.383
2	O	-0.414
3	O	-0.484
4	O	-0.434
5	O	-0.434
6	H	0.381

	x	y	z	Total
	1.567	-1.656	0.000	2.280
CHELPG
AIM
ESP

	x	y	z
x	5.240	-0.299	0.000
y	-0.299	5.106	0.000
z	0.000	0.000	4.528

<r²>	119.148
(<r²>)^1/2	10.915

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)