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	hartrees
Energy at 0K	-265.811724
Energy at 298.15K	-265.804887
Nuclear repulsion energy

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3946	3749	116.46
2	A	3724	3538	229.88
3	A	3438	3266	587.35
4	A	3122	2966	58.59
5	A	1777	1688	309.72
6	A	1623	1542	127.06
7	A	1458	1385	1.75
8	A	1396	1327	13.75
9	A	1227	1165	229.62
10	A	1081	1027	10.61
11	A	932	885	115.80
12	A	698	663	45.01
13	A	604	574	139.38
14	A	367	349	71.13
15	A	252	239	98.74
16	A	217	207	25.95
17	A	189	180	45.75
18	A	175	167	16.40

Atom	x (Å)	y (Å)	z (Å)
H1	0.390	0.957	0.007
O2	-0.580	1.131	0.009
O3	1.886	0.008	-0.088
C4	-1.197	-0.042	0.006
O5	-0.659	-1.128	0.004
H6	-2.282	0.090	0.008
H7	2.577	-0.099	0.568
H8	1.321	-0.777	-0.015

	H1	O2	O3	C4	O5	H6	H7	H8
H1		0.9853	1.7741	1.8749	2.3338	2.8087	2.4924	1.9675
O2	0.9853		2.7112	1.3249	2.2605	1.9947	3.4339	2.6928
O3	1.7741	2.7112		3.0849	2.7880	4.1696	0.9586	0.9695
C4	1.8749	1.3249	3.0849		1.2130	1.0926	3.8164	2.6231
O5	2.3338	2.2605	2.7880	1.2130		2.0299	3.4422	2.0104
H6	2.8087	1.9947	4.1696	1.0926	2.0299		4.8949	3.7055
H7	2.4924	3.4339	0.9586	3.8164	3.4422	4.8949		1.5419
H8	1.9675	2.6928	0.9695	2.6231	2.0104	3.7055	1.5419

Number	Element	Mulliken
1	H	0.324
2	O	-0.580
3	O	-0.386
4	C	0.988
5	O	-0.780
6	H	0.059
7	H	0.092
8	H	0.283

All results from a given calculation for HCOOHH₂O (Formic acid water dimer)

using model chemistry: MP2_cp/6-311+G(3df,2pd)

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
	0.365	0.331	1.242	1.336
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>	0.000
(<r²>)^1/2	0.000

All results from a given calculation for HCOOHH2O (Formic acid water dimer)

using model chemistry: MP2_cp/6-311+G(3df,2pd)

States and conformations

All results from a given calculation for HCOOHH₂O (Formic acid water dimer)