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	hartrees
Energy at 0K	-759.995592
Energy at 298.15K	-759.999347
HF Energy	-759.046544
Nuclear repulsion energy	285.260599

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A'	3613	3476
2	A'	1319	1269
3	A'	1183	1138
4	A'	976	939
5	A'	692	665
6	A'	523	503
7	A'	498	479
8	A'	365	351
9	A"	1188	1143
10	A"	530	510
11	A"	377	363
12	A"	167	161

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.148	0.010	0.000
O2	-0.488	1.425	0.000
O3	1.548	0.093	0.000
O4	-0.488	-0.717	1.225
O5	-0.488	-0.717	-1.225
H6	1.842	-0.848	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4544	1.6976	1.4650	1.4650	2.1672
O2	1.4544		2.4324	2.4673	2.4673	3.2549
O3	1.6976	2.4324		2.5104	2.5104	0.9865
O4	1.4650	2.4673	2.5104		2.4505	2.6356
O5	1.4650	2.4673	2.5104	2.4505		2.6356
H6	2.1672	3.2549	0.9865	2.6356	2.6356

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	104.549	O2	Cl1	O3	100.729
O2	Cl1	O4	115.375	O2	Cl1	O5	115.375
O3	Cl1	O4	104.840	O3	Cl1	O5	104.840
O4	Cl1	O5	113.512

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

using model chemistry: CCSD(T)/6-31G*

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: CCSD(T)/6-31G*

States and conformations

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