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	hartrees
Energy at 0K	-760.000035
Energy at 298.15K	-760.003860
HF Energy	-759.062540
Nuclear repulsion energy	286.432102

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3759	3554	129.08
2	A'	1299	1228	136.53
3	A'	1168	1104	161.81
4	A'	966	914	104.78
5	A'	705	667	148.01
6	A'	529	500	20.48
7	A'	512	484	15.58
8	A'	375	355	4.44
9	A"	1167	1103	264.42
10	A"	536	507	36.41
11	A"	389	368	19.51
12	A"	173	164	85.28

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.144	0.011	0.000
O2	-0.487	1.420	0.000
O3	1.538	0.090	0.000
O4	-0.487	-0.714	1.221
O5	-0.487	-0.714	-1.221
H6	1.840	-0.839	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4505	1.6835	1.4609	1.4609	2.1584
O2	1.4505		2.4229	2.4589	2.4589	3.2434
O3	1.6835	2.4229		2.4975	2.4975	0.9764
O4	1.4609	2.4589	2.4975		2.4419	2.6313
O5	1.4609	2.4589	2.4975	2.4419		2.6313
H6	2.1584	3.2434	0.9764	2.6313	2.6313

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	105.369	O2	Cl1	O3	101.004
O2	Cl1	O4	115.252	O2	Cl1	O5	115.252
O3	Cl1	O4	104.950	O3	Cl1	O5	104.950
O4	Cl1	O5	113.385

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

using model chemistry: QCISD/6-31+G**

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

using model chemistry: QCISD/6-31+G**

States and conformations

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