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	hartrees
Energy at 0K	-760.041968
Energy at 298.15K	-760.045601
HF Energy	-759.067467
Nuclear repulsion energy	282.513183

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A'	3710	3536
2	A'	1249	1190
3	A'	1132	1079
4	A'	930	886
5	A'	648	618
6	A'	502	478
7	A'	475	453
8	A'	355	338
9	A"	1142	1088
10	A"	508	484
11	A"	368	351
12	A"	144	137

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.153	0.010	0.000
O2	-0.491	1.438	0.000
O3	1.572	0.091	0.000
O4	-0.491	-0.722	1.238
O5	-0.491	-0.722	-1.238
H6	1.822	-0.856	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4666	1.7271	1.4772	1.4772	2.1571
O2	1.4666		2.4636	2.4889	2.4889	3.2577
O3	1.7271	2.4636		2.5394	2.5394	0.9797
O4	1.4772	2.4889	2.5394		2.4753	2.6269
O5	1.4772	2.4889	2.5394	2.4753		2.6269
H6	2.1571	3.2577	0.9797	2.6269	2.6269

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	102.121	O2	Cl1	O3	100.644
O2	Cl1	O4	115.446	O2	Cl1	O5	115.446
O3	Cl1	O4	104.573	O3	Cl1	O5	104.573
O4	Cl1	O5	113.826

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

using model chemistry: QCISD(T)/cc-pVDZ

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(T)/cc-pVDZ

States and conformations

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