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	hartrees
Energy at 0K	-115.971923
Energy at 298.15K
HF Energy	-115.971923
Nuclear repulsion energy	59.200102

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	3147	3025	0.00
2	A₁	1522	1463	0.00
3	A₁	1129	1085	0.00
4	B₁	903	868	0.00
5	B₂	3145	3023	0.62
6	B₂	2085	2004	50.32
7	B₂	1478	1421	6.69
8	E	3219	3094	2.10
8	E	3219	3094	2.10
9	E	1063	1022	1.76
9	E	1063	1022	1.76
10	E	907	872	83.51
10	E	907	872	83.51
11	E	365	351	6.47
11	E	365	351	6.47

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.000
C2	0.000	0.000	1.305
C3	0.000	0.000	-1.305
H4	0.000	0.928	1.873
H5	0.000	-0.928	1.873
H6	0.928	0.000	-1.873
H7	-0.928	0.000	-1.873

	C1	C2	C3	H4	H5	H6	H7
C1		1.3046	1.3046	2.0899	2.0899	2.0899	2.0899
C2	1.3046		2.6091	1.0878	1.0878	3.3100	3.3100
C3	1.3046	2.6091		3.3100	3.3100	1.0878	1.0878
H4	2.0899	1.0878	3.3100		1.8552	3.9687	3.9687
H5	2.0899	1.0878	3.3100	1.8552		3.9687	3.9687
H6	2.0899	3.3100	1.0878	3.9687	3.9687		1.8552
H7	2.0899	3.3100	1.0878	3.9687	3.9687	1.8552

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	H4	121.493	C1	C2	H5	121.493
C1	C3	H6	121.493	C1	C3	H7	121.493
C2	C1	C3	180.000	H4	C2	H5	117.015
H6	C3	H7	117.015

All results from a given calculation for CH₂CCH₂ (allene)

using model chemistry: B3PW91/3-21G

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	0.129
2	C	-0.538
3	C	-0.538
4	H	0.237
5	H	0.237
6	H	0.237
7	H	0.237

<r²>	48.972
(<r²>)^1/2	6.998

All results from a given calculation for CH2CCH2 (allene)

using model chemistry: B3PW91/3-21G

States and conformations

All results from a given calculation for CH₂CCH₂ (allene)