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Experimental data for CH2CHCH2CH2CH3 (1-pentene)

22 02 02 11 45
Other names
pentene; α-n-Amylene; Propylethylene; Pent-1-ene;
INChI INChIKey SMILES IUPAC name
InChI=1S/C5H10/c1-3-5-4-2/h3H,1,4-5H2,2H3 YWAKXRMUMFPDSH-UHFFFAOYSA-N C=CCCC Pent-1-ene
State Conformation
1A C1
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 -22.30 1.30 kJ mol-1 1970COX/PIL
Hfg(0K) enthalpy of formation   1.30 kJ mol-1 1970COX/PIL
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

Calculated vibrational frequencies for CH2CHCH2CH2CH3 (1-pentene).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.60397 0.07087 0.06979 2000Fra/Xu:6209

Calculated rotational constants for CH2CHCH2CH2CH3 (1-pentene).
Product of moments of inertia moments of inertia
1603748amu3Å6   7.3435189041705E-114gm3 cm6
Geometric Data
picture of 1-pentene

Point Group C1


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
dCCCC -119.3 1 2 3 4 2000Fra/Xu:6209
dCCCC -178.2 2 3 4 5 2000Fra/Xu:6209

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for CH2CHCH2CH2CH3 (1-pentene).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-C 3
C=C 1
H-C 10

Connectivity
Atom 1 Atom 2
C1 C2
C1 H6
C1 H7
C2 C3
C2 H8
C3 C4
C3 H9
C3 H10
C4 C5
C4 H11
C4 H12
C5 H13
C5 H14
C5 H15
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
9.490 0.030     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 C1 True 0.377 0.102   0.391 2000Fra/Xu:6209 x=a, y=b C1 3 5
1 2 1A C1 False           C1 3 5
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 CH2CHCH2CH2CH3 (1-pentene).
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 C1 True       C1 3 5
1 2 1A C1 False       C1 3 5

Calculated electric quadrupole moments for CH2CHCH2CH2CH3 (1-pentene).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
9.650   1998Gus/Rui:163

Calculated electric dipole polarizability for CH2CHCH2CH2CH3 (1-pentene).

References
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squib reference DOI
1970COX/PIL J.D. Cox, G. Pilcher, "Thermochemistry of Organic and Organometallic Compounds" Academic Press, London, 1970 10.1002/bbpc.19700740727
1998Gus/Rui:163 M Gussoni, R Rui, G Zerbi "Electronic and relaxation contribution to linear molecular polarizability. An analysis of the experimental values" J. Mol. Struct. 447 (1998) 163-215 10.1016/S0022-2860(97)00292-5
2000Fra/Xu:6209 GT Fraser, LH Xu, RD Suenram, CL Lugez "Rotational spectra of four of the five conformers of 1-pentene" J. Chem. Phys. 112(14) 6209-6217, 2000 10.1063/1.481220
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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