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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: QCISD(T)/daug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD(T)/daug-cc-pVDZ
 hartrees
Energy at 0K-114.247439
Energy at 298.15K 
HF Energy-113.883586
Nuclear repulsion energy30.892383
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)/daug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2922 2922        
2 A1 1736 1736        
3 A1 1513 1513        
4 B1 1167 1167        
5 B2 3000 3000        
6 B2 1244 1244        

Unscaled Zero Point Vibrational Energy (zpe) 5790.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5790.5 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/daug-cc-pVDZ
ABC
9.29410 1.26239 1.11143

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.685
C2 0.000 0.000 -0.538
H3 0.000 0.949 -1.125
H4 0.000 -0.949 -1.125

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.22262.04292.0429
C21.22261.11541.1154
H32.04291.11541.8972
H42.04291.11541.8972

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.735 O1 C2 H4 121.735
H3 C2 H4 116.531
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability