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	hartrees
Energy at 0K	-757.533591
Energy at 298.15K
HF Energy	-757.533591
Nuclear repulsion energy	276.739384

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3208	3188	19.34
2	A'	1181	1173	106.27
3	A'	1068	1061	75.53
4	A'	875	869	82.05
5	A'	599	595	111.72
6	A'	466	463	18.46
7	A'	431	428	1.30
8	A'	315	313	5.62
9	A"	1096	1089	151.27
10	A"	469	466	21.04
11	A"	324	322	19.17
12	A"	12i	12i	82.41

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.163	0.005	0.000
O2	-0.502	1.457	0.000
O3	1.613	0.119	0.000
O4	-0.502	-0.740	1.259
O5	-0.502	-0.740	-1.259
H6	1.933	-0.852	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4913	1.7794	1.5015	1.5015	2.2644
O2	1.4913		2.5027	2.5322	2.5322	3.3559
O3	1.7794	2.5027		2.6069	2.6069	1.0224
O4	1.5015	2.5322	2.6069		2.5176	2.7437
O5	1.5015	2.5322	2.6069	2.5176		2.7437
H6	2.2644	3.3559	1.0224	2.7437	2.7437

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	104.578	O2	Cl1	O3	99.469
O2	Cl1	O4	115.574	O2	Cl1	O5	115.574
O3	Cl1	O4	104.912	O3	Cl1	O5	104.912
O4	Cl1	O5	113.934

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

using model chemistry: BLYP/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	1.208
2	O	-0.353
3	O	-0.471
4	O	-0.368
5	O	-0.368
6	H	0.352

	x	y	z	Total
	1.489	-1.584	0.000	2.174
CHELPG
AIM
ESP

	x	y	z
x	4.231	-0.296	0.000
y	-0.296	4.164	0.000
z	0.000	0.000	3.619

<r²>	104.256
(<r²>)^1/2	10.211

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

using model chemistry: BLYP/3-21G*

States and conformations

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