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	hartrees
Energy at 0K	-229.427114
Energy at 298.15K	-229.424877
HF Energy	-229.427114
Nuclear repulsion energy	143.351775

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	3407	3369	0.00
2	Σ_g	2230	2205	0.00
3	Σ_g	2036	2013	0.00
4	Σ_g	633	626	0.00
5	Σ_u	3407	3369	288.96
6	Σ_u	2160	2136	8.74
7	Σ_u	1208	1194	4.66
8	Π_g	589	583	0.00
8	Π_g	589	583	0.00
9	Π_g	508	503	0.00
9	Π_g	508	503	0.00
10	Π_g	266	263	0.00
10	Π_g	266	263	0.00
11	Π_u	586	580	101.22
11	Π_u	586	580	101.22
12	Π_u	465	460	0.73
12	Π_u	465	460	0.73
13	Π_u	109	107	4.16
13	Π_u	109	107	4.16

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.616
C2	0.000	0.000	-0.616
C3	0.000	0.000	1.966
C4	0.000	0.000	-1.966
C5	0.000	0.000	3.188
C6	0.000	0.000	-3.188
H7	0.000	0.000	4.259
H8	0.000	0.000	-4.259

	C1	C2	C3	C4	C5	C6	H7	H8
C1		1.2321	1.3496	2.5817	2.5721	3.8043	3.6427	4.8748
C2	1.2321		2.5817	1.3496	3.8043	2.5721	4.8748	3.6427
C3	1.3496	2.5817		3.9313	1.2226	5.1539	2.2931	6.2244
C4	2.5817	1.3496	3.9313		5.1539	1.2226	6.2244	2.2931
C5	2.5721	3.8043	1.2226	5.1539		6.3764	1.0705	7.4469
C6	3.8043	2.5721	5.1539	1.2226	6.3764		7.4469	1.0705
H7	3.6427	4.8748	2.2931	6.2244	1.0705	7.4469		8.5175
H8	4.8748	3.6427	6.2244	2.2931	7.4469	1.0705	8.5175

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	C4	180.000	C1	C3	C5	180.000
C2	C1	C3	180.000	C2	C4	C6	180.000
C3	C5	H7	180.000	C4	C6	H8	180.000

All results from a given calculation for C₆H₂ (hexatriyne)

using model chemistry: PBEPBE/TZVP

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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Number	Element	Mulliken
1	C	0.064
2	C	0.064
3	C	-0.038
4	C	-0.038
5	C	-0.193
6	C	-0.193
7	H	0.167
8	H	0.167

<r²>	227.320
(<r²>)^1/2	15.077

All results from a given calculation for C6H2 (hexatriyne)

using model chemistry: PBEPBE/TZVP

States and conformations

All results from a given calculation for C₆H₂ (hexatriyne)