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	hartrees
Energy at 0K	-229.448327
Energy at 298.15K	-229.446394
HF Energy	-229.448327
Nuclear repulsion energy	144.241250

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	3488	3349	0.00
2	Σ_g	2333	2240	0.00
3	Σ_g	2129	2044	0.00
4	Σ_g	643	617	0.00
5	Σ_u	3488	3349	285.03
6	Σ_u	2246	2156	4.77
7	Σ_u	1222	1173	3.70
8	Π_g	663	637	0.00
8	Π_g	663	637	0.00
9	Π_g	552	530	0.00
9	Π_g	552	530	0.00
10	Π_g	275	264	0.00
10	Π_g	275	264	0.00
11	Π_u	663	636	99.55
11	Π_u	663	636	99.55
12	Π_u	486	466	3.64
12	Π_u	486	466	3.64
13	Π_u	112	108	4.63
13	Π_u	112	108	4.63

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.608
C2	0.000	0.000	-0.608
C3	0.000	0.000	1.961
C4	0.000	0.000	-1.961
C5	0.000	0.000	3.169
C6	0.000	0.000	-3.169
H7	0.000	0.000	4.233
H8	0.000	0.000	-4.233

	C1	C2	C3	C4	C5	C6	H7	H8
C1		1.2154	1.3531	2.5685	2.5609	3.7764	3.6250	4.8404
C2	1.2154		2.5685	1.3531	3.7764	2.5609	4.8404	3.6250
C3	1.3531	2.5685		3.9216	1.2079	5.1295	2.2719	6.1935
C4	2.5685	1.3531	3.9216		5.1295	1.2079	6.1935	2.2719
C5	2.5609	3.7764	1.2079	5.1295		6.3373	1.0640	7.4013
C6	3.7764	2.5609	5.1295	1.2079	6.3373		7.4013	1.0640
H7	3.6250	4.8404	2.2719	6.1935	1.0640	7.4013		8.4654
H8	4.8404	3.6250	6.1935	2.2719	7.4013	1.0640	8.4654

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: HSEh1PBE/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	0.076
2	C	0.076
3	C	-0.095
4	C	-0.095
5	C	-0.165
6	C	-0.165
7	H	0.184
8	H	0.184

<r²>	224.884
(<r²>)^1/2	14.996

All results from a given calculation for C6H2 (hexatriyne)

using model chemistry: HSEh1PBE/TZVP

States and conformations

All results from a given calculation for C₆H₂ (hexatriyne)