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Experimental data for C6H8 ((Z)-hexa-1,3,5-triene)

22 02 02 11 45
Other names
1,3,5-Hexatriene, (Z)-; 1,3,5-Hexatriene, cis-; (Z)-1,3,5-Hexatriene; (Z)-CH2=CHCH=CHCH=CH2; cis-1,3,5-Hexatriene; cis-Hexatriene; hexatriene; (Z)-hexa-1,3,5-triene;
INChI INChIKey SMILES IUPAC name
InChI=1S/C6H8/c1-3-5-6-4-2/h3-6H,1-2H2/b6-5- AFVDZBIIBXWASR-WAYWQWQTSA-N C=C/C=C\C=C (Z)-hexa-1,3,5-triene
State Conformation
1A1 C2V
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation 171.96 2.51 kJ mol-1  
Hfg(0K) enthalpy of formation   2.51 kJ mol-1  
Entropy (298.15K) entropy     J K-1 mol-1  
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity     kJ mol-1  
Heat Capacity (298.15K) heat capacity 110.17   J K-1 mol-1 webbook
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A1 3097   1993Liu/Zho:1850      
2 A1 3015   1993Liu/Zho:1850      
3 A1 3030   1993Liu/Zho:1850      
4 A1 3015   1993Liu/Zho:1850      
5 A1 1622   1993Liu/Zho:1850      
6 A1 1570   1993Liu/Zho:1850      
7 A1 1392   1993Liu/Zho:1850      
8 A1 1314   1993Liu/Zho:1850      
9 A1 1182   1993Liu/Zho:1850      
10 A1 1083   1993Liu/Zho:1850      
11 A1 1136   1993Liu/Zho:1850      
12 A1 393   1993Liu/Zho:1850      
13 A1 167   1993Liu/Zho:1850      
14 A2 978   1993Liu/Zho:1850      
15 A2 920   1993Liu/Zho:1850      
16 A2 883   1993Liu/Zho:1850      
17 A2 709   1993Liu/Zho:1850      
18 A2 331   1993Liu/Zho:1850      
19 A2 264   1993Liu/Zho:1850      
20 B1 990   1993Liu/Zho:1850      
21 B1 910   1993Liu/Zho:1850      
22 B1 818   1993Liu/Zho:1850      
23 B1 589   1993Liu/Zho:1850      
24 B1 358   1993Liu/Zho:1850      
25 B2 3100   1993Liu/Zho:1850      
26 B2 3080   1993Liu/Zho:1850      
27 B2 3050   1993Liu/Zho:1850      
28 B2 3050   1993Liu/Zho:1850      
29 B2 1612   1993Liu/Zho:1850      
30 B2 1452   1993Liu/Zho:1850      
31 B2 1355   1993Liu/Zho:1850      
32 B2 1280   1993Liu/Zho:1850      
33 B2 1148   1993Liu/Zho:1850      
34 B2 950   1993Liu/Zho:1850      
35 B2 479   1993Liu/Zho:1850      
36 B2 243   1993Liu/Zho:1850      

vibrational zero-point energy: 25282.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for C6H8 ((Z)-hexa-1,3,5-triene).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
       

Calculated rotational constants for C6H8 ((Z)-hexa-1,3,5-triene).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of (Z)-hexa-1,3,5-triene

Point Group C2v


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rCH 1.104   1 7 1976Hellwege(II/7) weighted average
rCC 1.458   1 3 1976Hellwege(II/7)
rCC 1.337   3 5 1976Hellwege(II/7) end =
rCC 1.368   1 2 1976Hellwege(II/7) center =
aCCC 121.7 1 3 5 1976Hellwege(II/7) from end
aCCC 124.4 2 1 3 1976Hellwege(II/7)

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for C6H8 ((Z)-hexa-1,3,5-triene).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 8
C-C 2
C=C 3

Connectivity
Atom 1 Atom 2
C1 C2
C1 C3
C1 H7
C2 C4
C2 H8
C3 C5
C3 H9
C4 C6
C4 H10
C5 H11
C5 H13
C6 H12
C6 H14
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
8.310 0.020     webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A1 C2v True           C2v 1 2
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for C6H8 ((Z)-hexa-1,3,5-triene).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A1 C2v True       C2v 1 2

Calculated electric quadrupole moments for C6H8 ((Z)-hexa-1,3,5-triene).

References
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squib reference DOI
1976Hellwege(II/7) Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.  
1993Liu/Zho:1850 Liu and Zhou. Theoretical Study on the Structure and Vibrations of cis-1,3,5-Hexatriene. J. Phys. Chem. Vol. 97. #9. pgs. 1850-1855. 10.1021/j100111a022
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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