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	hartrees
Energy at 0K	-759.344098
Energy at 298.15K	-759.346344
HF Energy	-758.752142
Nuclear repulsion energy	251.430732

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3481	3360	2.46
2	A'	894	863	201.75
3	A'	741	715	162.91
4	A'	680	656	93.99
5	A'	429	414	251.03
6	A'	348	336	7.64
7	A'	280	271	48.36
8	A'	205	198	2.11
9	A"	691	667	200.46
10	A"	358	346	7.16
11	A"	220	212	44.72
12	A"	135	131	80.83

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.196	-0.005	0.000
O2	-0.572	1.563	0.000
O3	1.849	0.166	0.000
O4	-0.572	-0.813	1.370
O5	-0.572	-0.813	-1.370
H6	2.276	-0.742	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.6129	2.0517	1.6346	1.6346	2.5789
O2	1.6129		2.7953	2.7431	2.7431	3.6638
O3	2.0517	2.7953		2.9489	2.9489	1.0030
O4	1.6346	2.7431	2.9489		2.7406	3.1611
O5	1.6346	2.7431	2.9489	2.7406		3.1611
H6	2.5789	3.6638	1.0030	3.1611	3.1611

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	110.411	O2	Cl1	O3	98.713
O2	Cl1	O4	115.269	O2	Cl1	O5	115.269
O3	Cl1	O4	105.699	O3	Cl1	O5	105.699
O4	Cl1	O5	113.923

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

using model chemistry: MP2/SDD

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: MP2/SDD

States and conformations

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