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	hartrees
Energy at 0K	-263.744188
Energy at 298.15K	-263.737055
Nuclear repulsion energy

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3652	3486	31.16
2	A	3507	3347	8.43
3	A	3504	3345	35.56
4	A	3201	3055	8.29
5	A	1745	1666	57.98
6	A	1706	1628	147.12
7	A	1447	1381	26.64
8	A	1284	1226	22.46
9	A	1158	1105	9.29
10	A	1024	977	278.37
11	A	650	621	245.71
12	A	637	608	210.39
13	A	584	558	150.00
14	A	333	317	117.61
15	A	257	246	98.66
16	A	205	196	1.77
17	A	163	156	23.87
18	A	135	129	18.39

Atom	x (Å)	y (Å)	z (Å)
H1	1.723	0.495	-0.178
O2	2.225	-0.355	-0.094
O3	-0.207	1.026	0.011
H4	2.590	-0.360	0.825
H5	-0.965	1.672	0.015
C6	-0.717	-0.289	-0.005
O7	-1.917	-0.561	0.009
H8	0.147	-0.947	-0.034

	H1	O2	O3	H4	H5	C6	O7	H8
H1		0.9912	2.0104	1.5778	2.9407	2.5693	3.7952	2.1413
O2	0.9912		2.7985	0.9893	3.7812	2.9443	4.1483	2.1614
O3	2.0104	2.7985		3.2259	0.9962	1.4109	2.3336	2.0046
H4	1.5778	0.9893	3.2259		4.1743	3.4111	4.5852	2.6559
H5	2.9407	3.7812	0.9962	4.1743		1.9770	2.4282	2.8454
C6	2.5693	2.9443	1.4109	3.4111	1.9770		1.2303	1.0862
O7	3.7952	4.1483	2.3336	4.5852	2.4282	1.2303		2.0999
H8	2.1413	2.1614	2.0046	2.6559	2.8454	1.0862	2.0999

Number	Element	Mulliken
1	H	0.400
2	O	-0.745
3	O	-0.709
4	H	0.362
5	H	0.413
6	C	0.560
7	O	-0.572
8	H	0.292

All results from a given calculation for H₂OHCOOH (Water formic acid dimer 1)

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
	0.855	2.332	1.616	2.963
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>	115.530
(<r²>)^1/2	10.748

All results from a given calculation for H2OHCOOH (Water formic acid dimer 1)

using model chemistry: MP2_cp/3-21G

States and conformations

All results from a given calculation for H₂OHCOOH (Water formic acid dimer 1)