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All results from a given calculation for CHOCH2OH (hydroxy acetaldehyde)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS H in 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-228.539938
Energy at 298.15K-228.544900
HF Energy-227.789538
Nuclear repulsion energy119.844231
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 MP2/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3759 3550 72.63      
2 A' 3057 2887 46.46      
3 A' 3026 2858 51.11      
4 A' 1783 1684 77.77      
5 A' 1519 1435 13.38      
6 A' 1472 1390 69.58      
7 A' 1412 1334 15.63      
8 A' 1327 1253 44.87      
9 A' 1161 1097 73.13      
10 A' 892 842 42.11      
11 A' 772 729 9.75      
12 A' 308 291 21.87      
13 A" 3092 2920 18.00      
14 A" 1268 1198 2.02      
15 A" 1123 1061 0.32      
16 A" 739 698 0.02      
17 A" 418 394 77.67      
18 A" 201 190 4.58      

Unscaled Zero Point Vibrational Energy (zpe) 13663.0 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 12904.7 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 MP2/6-31G(2df,p)
ABC
0.61152 0.22214 0.16802

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 -0.934 0.000
C2 -0.927 0.269 0.000
O3 1.346 -0.572 0.000
O4 -0.505 1.401 0.000
H5 1.324 0.390 0.000
H6 -0.240 -1.541 0.882
H7 -0.240 -1.541 -0.882
H8 -2.013 0.050 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.51951.39402.38951.87311.09721.09722.2407
C21.51952.42401.20802.25482.12762.12761.1077
O31.39402.42402.70540.96252.05752.05753.4160
O42.38951.20802.70542.08993.08263.08262.0249
H51.87312.25480.96252.08992.63722.63723.3545
H61.09722.12762.05753.08262.63721.76492.5398
H71.09722.12762.05753.08262.63721.76492.5398
H82.24071.10773.41602.02493.35452.53982.5398

picture of hydroxy acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O4 121.932 C1 C2 H8 116.172
C1 O3 H5 103.774 C2 C1 O3 112.534
C2 C1 H6 107.702 C2 C1 H7 107.702
O3 C1 H6 110.795 O3 C1 H7 110.795
O4 C2 H8 121.896 H6 C1 H7 107.085
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability