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Experimental data for CH2ClCHO (chloroacetaldehyde)

22 02 02 11 45
Other names
Acetaldehyde, chloro-; Monochloroacetaldehyde; 2-Chloro-1-ethanal; 2-Chloroacetaldehyde; Chloroethanal; 2-Chloroethanal;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H3ClO/c3-1-2-4/h2H,1H2 QSKPIOLLBIHNAC-UHFFFAOYSA-N O=CCCl 2-Chloroacetaldehyde
State Conformation
1A C1 bisecting, 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
Barrier to Internal Rotation 505.8   kJ mol-1 1990Dur/Pha:459 V1=414 V2=191 V3=-203 V4=44 V6=-26 cm-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
1 A 3001           11
2 A 2955   1990Dur/Pha:459      
3 A 2831           2
4 A 1753           3
5 A 1417           4
6 A 1378           5
7 A 1243           6
8 A 1163           12
9 A 1036           7
10 A 1020           13
11 A 806           14
12 A 742           8
13 A 464           9
14 A 292           10
15 A 27           15

vibrational zero-point energy: 10064.0 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for CH2ClCHO (chloroacetaldehyde).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
1.12109 0.08985 0.08504 1976For:354

Calculated rotational constants for CH2ClCHO (chloroacetaldehyde).
Product of moments of inertia moments of inertia
559245.7amu3Å6   2.56077034418325E-114gm3 cm6
Geometric Data
picture of chloroacetaldehyde

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
rHC 1.093 0.012 1 5 1983Dyn/Sch:45
rCO 1.206 0.003 2 4 1983Dyn/Sch:45
rCCl 1.782 0.004 1 3 1983Dyn/Sch:45
rCC 1.521 0.005 1 2 1983Dyn/Sch:45
aCCO 123.3 0.6 1 2 4 1983Dyn/Sch:45
aCCH 112.4 3.8 1 2 7 1983Dyn/Sch:45
aCCCl 110.4 0.3 2 1 3
aCCH 110.3 1.5 2 1 5 1983Dyn/Sch:45
aHCH 109.5 5 1 6 1983Dyn/Sch:45 !assumed
dOCCCl 180 3 1 2 4 1983Dyn/Sch:45 !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 CH2ClCHO (chloroacetaldehyde).

Bond descriptions


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

Connectivity
Atom 1 Atom 2
C1 C2
C1 Cl3
C1 H5
C1 H6
C2 O4
C2 H7
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
10.480 0.030 10.610   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 bisecting, trans True           C1 3 5
1 2 1A' CS eclipsed, cis False           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 CH2ClCHO (chloroacetaldehyde).
Electric quadrupole moment quadrupole An error occurred on the server when processing the URL. Please contact the system administrator.

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State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole