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Experimental data for CH3COCCH (3-butyn-2-one)

22 02 02 11 45
Other names
Methyl ethynyl ketone; 1-Butyn-3-one; Ketone, ethynyl methyl; Ethynyl methyl ketone; Acetylacetylene; Acetylethyne; But-3-yn-2-one; 3-Butyne-2-one;
INChI INChIKey SMILES IUPAC name
InChI=1S/C4H4O/c1-3-4(2)5/h1H,2H3 XRGPFNGLRSIPSA-UHFFFAOYSA-N CC(C#C)=O
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
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'   3262 1973Cor:1885      
2 A'   3011 1973Cor:1885      
3 A'   2921 1973Cor:1885      
4 A'   2099 1973Cor:1885      
5 A'   1690 1973Cor:1885      
6 A'   1426 1973Cor:1885      
7 A'   1364 1973Cor:1885      
8 A'   1198 1973Cor:1885      
9 A'   981 1973Cor:1885      
10 A'   741 1973Cor:1885      
11 A'   700 1973Cor:1885      
12 A'   587 1973Cor:1885      
13 A'   435 1973Cor:1885      
14 A'   183 1973Cor:1885      
15 A"   2972 1973Cor:1885      
16 A"   1426 1973Cor:1885      
17 A"   1022 1973Cor:1885      
18 A"   700 1973Cor:1885      
19 A"   587 1973Cor:1885      
20 A"   228 1973Cor:1885       nu21

Calculated vibrational frequencies for CH3COCCH (3-butyn-2-one).
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 CH3COCCH (3-butyn-2-one).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of 3-butyn-2-one

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 CH3COCCH (3-butyn-2-one).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 4
C-C 2
C=O 1
C#C 1

Connectivity
Atom 1 Atom 2
C1 C2
C1 H6
C1 H7
C1 H8
C2 O3
C2 C4
C4 C5
C5 H9
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
10.250       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           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 CH3COCCH (3-butyn-2-one).
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 CH3COCCH (3-butyn-2-one).

References
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squib reference DOI
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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