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Experimental data for C5H8 (1,3-Pentadiene, (Z)-)

22 02 02 11 45
Other names
1,3-Pentadiene, (Z)-; 1,cis-3-Pentadiene; (Z)-1,3-Pentadiene; (Z)-CH2=CHCH=CHCH3; cis-1,3-Pentadiene; cis-1-Methylbutadiene; cis-Piperylene; pentadiene; 1,3-pentadiene;
INChI INChIKey SMILES IUPAC name
InChI=1S/C5H8/c1-3-5-4-2/h3-5H,1H2,2H3/b5-4- PMJHHCWVYXUKFD-PLNGDYQASA-N C=C/C=C\C
State Conformation
1A' CS
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 82.80   kJ mol-1 TRC
Hfg(0K) enthalpy of formation 103.00   kJ mol-1 TRC
Entropy (298.15K) entropy 322.95   J K-1 mol-1 TRC
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 18.95   kJ mol-1 TRC
Heat Capacity (298.15K) heat capacity 97.18   J K-1 mol-1 TRC
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 A' 3060   1974sve/kov      
2 A' 3060   1974sve/kov      
3 A' 3015   1974sve/kov      
4 A' 2998   1974sve/kov      
5 A' 2998   1974sve/kov      
6 A' 2938   1974sve/kov      
7 A' 2919   1974sve/kov      
8 A' 1656   1974sve/kov      
9 A' 1602   1974sve/kov      
10 A' 1445   1974sve/kov      
11 A' 1435   1974sve/kov      
12 A' 1391   1974sve/kov      
13 A' 1357   1974sve/kov      
14 A' 1300   1974sve/kov      
15 A' 1254   1974sve/kov      
16 A' 1169   1974sve/kov      
17 A' 1025   1974sve/kov      
18 A' 964   1974sve/kov      
19 A' 840   1974sve/kov      
20 A' 627   1974sve/kov      
21 A' 402   1974sve/kov      
22 A' 144   1974sve/kov      
23 A" 2975   1974sve/kov      
24 A" 1471   1974sve/kov      
25 A" 1009   1974sve/kov      
26 A" 997   1974sve/kov      
27 A" 921   1974sve/kov      
28 A" 906   1974sve/kov      
29 A" 773   1974sve/kov      
30 A" 627   1974sve/kov      
31 A" 456   1974sve/kov      
32 A" 171   1974sve/kov      

Calculated vibrational frequencies for C5H8 (1,3-Pentadiene, (Z)-).
Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.52243 0.08867 0.07692 NISThydrocarbon

Calculated rotational constants for C5H8 (1,3-Pentadiene, (Z)-).
Product of moments of inertia moments of inertia
1344318amu3Å6   6.155594481096E-114gm3 cm6
Geometric Data
picture of 1,3-Pentadiene, (Z)-

Point Group Cs


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

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for C5H8 (1,3-Pentadiene, (Z)-).

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 2

Connectivity
Atom 1 Atom 2
C1 C2
C1 H6
C1 H7
C2 C3
C2 H8
C3 C4
C3 H9
C4 C5
C4 H10
C5 H11
C5 H12
C5 H13
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A'

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
8.620 0.030 8.630   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 1A' Cs True 0.465 0.185   0.500 NISThydrocarbon x=a, y=b Cs 2 3
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 C5H8 (1,3-Pentadiene, (Z)-).
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 1A' Cs True       Cs 2 3

Calculated electric quadrupole moments for C5H8 (1,3-Pentadiene, (Z)-).

References
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squib reference DOI
1974sve/kov L.M. Sverdlov, M. A. Kovner, E. P. Krainov, "Vibrational Spectra of Polyatomic Molecules" Wiley, New York 1974  
NISThydrocarbon NIST Hydrocarbon spectral database (http://www.physics.nist.gov/PhysRefData/MolSpec/Hydro/index.html) 10.18434/T4PC70
TRC Frenkel, M; Marsh, K.N.; Wilhoit, R.C.; Kabo, G.J.; Roganov, G.N.,Thermodynamics of Organic Compounds in the Gas State,Thermodynamics Research Center, College Station, TX, 1994  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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