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

using model chemistry: QCISD/3-21G

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 QCISD/3-21G
 hartrees
Energy at 0K-226.930160
Energy at 298.15K-226.935081
HF Energy-226.479505
Nuclear repulsion energy117.184377
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3435 3330 17.82      
2 A' 3008 2916 53.76      
3 A' 2989 2897 38.89      
4 A' 1664 1613 30.34      
5 A' 1579 1530 6.78      
6 A' 1488 1442 114.68      
7 A' 1427 1383 8.85      
8 A' 1322 1281 44.21      
9 A' 1043 1011 29.27      
10 A' 825 799 39.51      
11 A' 750 727 9.10      
12 A' 317 307 21.47      
13 A" 3024 2930 32.03      
14 A" 1245 1207 7.49      
15 A" 1132 1097 0.19      
16 A" 795 770 0.01      
17 A" 432 419 107.06      
18 A" 173 167 10.80      

Unscaled Zero Point Vibrational Energy (zpe) 13323.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 12913.0 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/3-21G
ABC
0.56865 0.21692 0.16185

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.973 0.000
C2 0.957 -0.228 0.000
O3 -1.380 0.502 0.000
O4 0.520 -1.396 0.000
H5 -1.309 -0.494 0.000
H6 0.211 1.587 0.891
H7 0.211 1.587 -0.891
H8 2.034 0.002 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.53491.45852.42551.96591.10281.10282.2540
C21.53492.44841.24782.28162.15502.15501.1017
O31.45852.44842.68620.99842.12202.12203.4511
O42.42551.24782.68622.03983.12913.12912.0612
H51.96592.28160.99842.03982.72662.72663.3801
H61.10282.15502.12203.12912.72661.78262.5754
H71.10282.15502.12203.12912.72661.78262.5754
H82.25401.10173.45112.06123.38012.57542.5754

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 120.951 C1 C2 H8 116.535
C1 O3 H5 104.737 C2 C1 O3 109.733
C2 C1 H6 108.455 C2 C1 H7 108.455
O3 C1 H6 111.133 O3 C1 H7 111.133
O4 C2 H8 122.515 H6 C1 H7 107.843
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability