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	hartrees
Energy at 0K	-264.346668
Energy at 298.15K	-264.348466
HF Energy	-264.346668
Nuclear repulsion energy	143.663746

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A'	3557	3378	54.79
2	A'	3513	3336	48.92
3	A'	2271	2156	66.82
4	A'	1780	1690	225.72
5	A'	1397	1327	67.29
6	A'	1130	1073	381.27
7	A'	821	780	23.75
8	A'	769	730	44.61
9	A'	614	583	11.45
10	A'	520	494	29.35
11	A'	188	179	5.99
12	A"	853	810	3.69
13	A"	795	755	88.33
14	A"	623	591	131.72
15	A"	287	273	15.83

Atom	x (Å)	y (Å)
C1	0.000	0.480
C2	-0.224	-0.939
C3	-0.532	-2.103
O4	1.343	0.748
O5	-0.861	1.348
H6	-0.784	-3.135
H7	1.466	1.733

	C1	C2	C3	O4	O5	H6	H7
C1		1.4358	2.6364	1.3691	1.2231	3.6981	1.9288
C2	1.4358		1.2039	2.3022	2.3739	2.2661	3.1616
C3	2.6364	1.2039		3.4116	3.4667	1.0623	4.3248
O4	1.3691	2.3022	3.4116		2.2837	4.4267	0.9929
O5	1.2231	2.3739	3.4667	2.2837		4.4836	2.3583
H6	3.6981	2.2661	1.0623	4.4267	4.4836		5.3625
H7	1.9288	3.1616	4.3248	0.9929	2.3583	5.3625

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	C3	174.204	C1	O4	H7	108.438
C2	C1	O4	110.299	C2	C1	O5	126.275
C2	C3	H6	178.943	O4	C1	O5	123.426

All results from a given calculation for C₃H₂O₂ (Propiolic acid)

using model chemistry: mPW1PW91/3-21G*

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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Number	Element	Mulliken
1	C	0.517
2	C	0.101
3	C	-0.316
4	O	-0.555
5	O	-0.449
6	H	0.309
7	H	0.393

	x	y	z	Total
	1.003	-0.957	0.000	1.386
CHELPG
AIM
ESP

	x	y	z
x	3.548	0.931	0.000
y	0.931	7.445	0.000
z	0.000	0.000	1.494

<r²>	106.063
(<r²>)^1/2	10.299

All results from a given calculation for C3H2O2 (Propiolic acid)

using model chemistry: mPW1PW91/3-21G*

States and conformations

All results from a given calculation for C₃H₂O₂ (Propiolic acid)