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Experimental data for CH3CHNOH (Acetaldoxime)

22 02 02 11 45
Other names
(E)-CH3CH=NOH; Acetaldehyde oxime; Acetaldoxime; Acetaldoxime,syn & anti; Aldoxime; Ethanal oxime; Ethylidenehydroxylamine; USAF am-5; (E)-acetaldehyde oxime;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H5NO/c1-2-3-4/h2,4H,1H3/b3-2+ FZENGILVLUJGJX-NSCUHMNNSA-N C/C=N/O (E)-acetaldehyde oxime
State Conformation
1A' CS trans
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 -22.55 0.29 kJ mol-1 1990STE/CHI
Hfg(0K) enthalpy of formation   0.29 kJ mol-1 1990STE/CHI
Entropy (298.15K) entropy     J K-1 mol-1  
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity     kJ mol-1  
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 CH3CHNOH (Acetaldoxime).
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
1.48814 0.14136 0.13255 1969Rog/Sch:397

Calculated rotational constants for CH3CHNOH (Acetaldoxime).
Product of moments of inertia moments of inertia
171809.1amu3Å6   7.867091727195E-115gm3 cm6
Geometric Data
picture of Acetaldoxime

Point Group


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
rCN 1.276   2 3 1969Rog/Sch:397 !assumed
rNO 1.408   3 4 1969Rog/Sch:397 !assumed
rOH 0.956   4 5 1969Rog/Sch:397 !assumed
rCH 1.085   2 9 1969Rog/Sch:397 !assumed
rCH 1.100   1 6 1969Rog/Sch:397 !assumed
rCC 1.550   1 2 1969Rog/Sch:397 !assumed
aHON 103 3 4 5 1969Rog/Sch:397 !assumed
aCNO 110 2 3 4 1969Rog/Sch:397 !assumed
aHCN 122 3 2 9 1969Rog/Sch:397 !assumed
aCCN 116 1 2 3 1969Rog/Sch:397 !assumed
aHCH 109.4 6 1 7 1969Rog/Sch:397 !assumed

These cartesians were determined using some assumed coordinate values. Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for CH3CHNOH (Acetaldoxime).

Bond descriptions


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

Connectivity
Atom 1 Atom 2
C1 C2
C1 H6
C1 H7
C1 H8
C2 N3
C2 H9
N3 O4
O4 H5
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
10.000   10.200   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 trans True 0.887 0.304   0.938 1969Rog/Sch:397 μx = μa , μyb Cs 2 3
1 2 1A' CS cis False 0.801 0.284   0.850 1969Rog/Sch:397 μx = μa , μyb 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 CH3CHNOH (Acetaldoxime).
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 trans True       Cs 2 3
1 2 1A' CS cis False       Cs 2 3

Calculated electric quadrupole moments for CH3CHNOH (Acetaldoxime).

References
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squib reference DOI
1969Rog/Sch:397 Rogowski, Schwendeman, Microwave Spectra, Barriers to Internal Rotation, Quadrupole Coupling Constants, and Dipole Moments of cis- and trans-Acetaldoxime 10.1063/1.1670810
1990STE/CHI Steele, W.V.; Chirico, R.D.; Nguyen, A.; Hossenlopp, I.A.; Smith, N.K., Determination of ideal-gas enthalpies of formation for key compounds, Am. Inst. Chem. Eng. Symp. Ser. (AIChE Symp. Ser.), 1990, 138-154.  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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