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	hartrees
Energy at 0K	-263.743982
Energy at 298.15K	-263.736963
Nuclear repulsion energy

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
18	A	3647	3481	33.59
17	A	3497	3338	26.53
16	A	3490	3331	41.34
15	A	3234	3087	4.70
14	A	1750	1670	52.47
13	A	1665	1589	177.12
12	A	1434	1369	11.52
11	A	1357	1295	8.39
10	A	1151	1099	9.80
9	A	1081	1032	209.97
8	A	690	659	201.42
7	A	644	615	252.45
6	A	614	586	299.61
5	A	330	315	109.06
4	A	279	267	122.84
3	A	223	213	0.16
2	A	160	153	26.41
1	A	145	138	13.28

Atom	x (Å)	y (Å)	z (Å)
H1	-1.746	0.506	-0.141
O2	-2.267	-0.336	-0.092
O3	0.190	1.041	0.009
H4	-2.669	-0.350	0.811
C5	0.576	-0.141	-0.013
O6	1.898	-0.529	0.011
H7	-0.085	-0.999	-0.054
H8	2.475	0.283	0.041

	H1	O2	O3	H4	C5	O6	H7	H8
H1		0.9918	2.0144	1.5786	2.4133	3.7908	2.2432	4.2308
O2	0.9918		2.8188	0.9887	2.8503	4.1703	2.2807	4.7842
O3	2.0144	2.8188		3.2795	1.2435	2.3199	2.0599	2.4076
H4	1.5786	0.9887	3.2795		3.3542	4.6398	2.8014	5.2401
C5	2.4133	2.8503	1.2435	3.3542		1.3782	1.0838	1.9471
O6	3.7908	4.1703	2.3199	4.6398	1.3782		2.0386	0.9973
H7	2.2432	2.2807	2.0599	2.8014	1.0838	2.0386		2.8649
H8	4.2308	4.7842	2.4076	5.2401	1.9471	0.9973	2.8649

Number	Element	Mulliken
1	H	0.398
2	O	-0.757
3	O	-0.611
4	H	0.358
5	C	0.591
6	O	-0.679
7	H	0.288
8	H	0.411

All results from a given calculation for H₂OHCOOH (Water formic acid dimer 2)

using model chemistry: MP2_cp/3-21G

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
	Home All data for one species Geometry Experimental Experimental Geometries Same bond/angle many molecules Internal Coordinates by type Bond angles Calculated Calculated geometry Rotational constant Moments of inertia Products of moments of inertia BSE Bond lengths Show me a calculated geometry Comparisons Bonds, angles Rotational Constants Products of moments of inertia Point group Bad Calculations Bad moment of inertia Tutorials and Explanations Angle formulas Vibrations Experimental Vibrational frequencies Calculated Frequencies Scale factors Reactions Entropies Ions List Ions Energy Calculated Ionization Energy Compare Ionzation energy Electron Affinity Calculated Electron affinity Compare Electron affinity Proton Affinity Calculated Proton affinity Compare Proton affinity Ionization changes point group Experimental One molecule all properties One property a few molecules Enthalpy of formation Entropy Integrated Heat Capacity Heat Capacity Rotational Constants Vibrational Frequencies Dipole moment Ionization Energy Polarizability Quadrupole Point Groups Geometry Experimental Geometries Internal Coordinates by type Bond angles Rotational Constants Point Groups Diatomic bond lengths Vibrations Vibrational frequencies Diatomic Triatomics Energy Atomization Energy Internal Rotation Electrostatics Dipole Quadrupole Polarizability Reference Data Reference states Spin Splittings Molecules with good enthalpy Enthalpy at 0 Kelvin Calculated Energy Optimized Energy Energy 298K Minimum conformation Hydrogen bonds H bond with counterpoise Reaction Reaction Energy 0K Reaction Energy 298K Internal Rotation Barriers to internal rotation Rotational barrier and dipole Rotational Barrier 2 molecules Orbital HOMO LUMO gap HOMO Orbital Energies Nuclear repulsion energy Correlation Full vs Frozen core energies Partial correlation energies Ion Calculated Ionization Energy Vertical ionization Energy Calculated Electron affinity Calculated Proton affinity Atom charge differences Excited State Singlet triplet gap Electronic state Transition state Basis Set Extrapolation BSE energy BSE Bond lengths Geometry Calculated geometry AIM bond orders One type of bond Rotation Rotational constant Products of moments of inertia Moments of inertia Inertial defects Second moments Point group State symmetry <r2> Sorted by r2 Z-matrix Bad Calculations Bad moment of inertia Bad Calculated Bond Lengths Bad point group Worst molecules Vibrations Frequencies Animated vibrations Anharmonic Zero point energy (ZPE) Scale Factors Scale factors Scale factor uncertainty Calculate a scale factor Why scale vibrations Set scaling factors Bad Calculations Bad Vib. 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Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
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	x	y	z	Total
	1.283	0.442	1.677	2.157
CHELPG
AIM
ESP

	x	y	z
x	0.000	0.000	0.000
y	0.000	0.000	0.000
z	0.000	0.000	0.000

<r²>	117.143
(<r²>)^1/2	10.823

All results from a given calculation for H2OHCOOH (Water formic acid dimer 2)

using model chemistry: MP2_cp/3-21G

States and conformations

All results from a given calculation for H₂OHCOOH (Water formic acid dimer 2)