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	hartrees
Energy at 0K	-760.559331
Energy at 298.15K	-760.563419
HF Energy	-759.280741
Nuclear repulsion energy	293.314596

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3750	3560	127.29
2	A'	1386	1316	254.87
3	A'	1221	1159	85.39
4	A'	1109	1053	71.96
5	A'	728	691	232.08
6	A'	574	545	17.92
7	A'	561	532	9.21
8	A'	411	391	4.54
9	A"	1334	1266	291.71
10	A"	581	552	29.34
11	A"	424	403	14.03
12	A"	190	180	80.57

Atom	x (Å)	y (Å)	z (Å)
Cl1	-0.144	0.009	0.000
O2	-0.474	1.385	0.000
O3	1.506	0.090	0.000
O4	-0.474	-0.695	1.193
O5	-0.474	-0.695	-1.193
H6	1.787	-0.840	0.000

	Cl1	O2	O3	O4	O5	H6
Cl1		1.4145	1.6527	1.4235	1.4235	2.1101
O2	1.4145		2.3658	2.3970	2.3970	3.1721
O3	1.6527	2.3658		2.4415	2.4415	0.9715
O4	1.4235	2.3970	2.4415		2.3853	2.5610
O5	1.4235	2.3970	2.4415	2.3853		2.5610
H6	2.1101	3.1721	0.9715	2.5610	2.5610

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Cl1	O3	H6	104.008	O2	Cl1	O3	100.660
O2	Cl1	O4	115.262	O2	Cl1	O5	115.262
O3	Cl1	O4	104.814	O3	Cl1	O5	104.814
O4	Cl1	O5	113.821

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

using model chemistry: MP2=FULL/cc-pVTZ

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=FULL/cc-pVTZ

States and conformations

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