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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: QCISD(T)/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-153.599240
Energy at 298.15K 
HF Energy-152.976245
Nuclear repulsion energy69.538396
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at QCISD(T)/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVTZ
ABC
1.89231 0.33738 0.30238

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.231 0.403 -0.000
C2 -1.170 -0.150 -0.000
O3 1.236 -0.278 0.000
H4 0.308 1.508 -0.000
H5 -1.151 -1.239 -0.001
H6 -1.704 0.219 0.881
H7 -1.705 0.220 -0.880

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50531.21411.10792.14562.13372.1337
C21.50532.40912.22061.08921.09421.0942
O31.21412.40912.01252.57333.10933.1097
H41.10792.22062.01253.11012.54662.5462
H52.14561.08922.57333.11011.79111.7911
H62.13371.09423.10932.54661.79111.7606
H72.13371.09423.10972.54621.79111.7606

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.554 C1 C2 H6 109.313
C1 C2 H7 109.313 C2 C1 O3 124.381
C2 C1 H4 115.532 O3 C1 H4 120.087
H5 C2 H6 110.233 H5 C2 H7 110.233
H6 C2 H7 107.123
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability