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

using model chemistry: G4

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 G4
 hartrees
Energy at 0K-228.939547
Energy at 298.15K-228.934148
HF Energy-229.059859
Nuclear repulsion energy119.698792
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 B3LYP/6-31G(2df,p)
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' 3698 3568 58.14      
2 A' 2964 2861 63.06      
3 A' 2926 2824 62.06      
4 A' 1817 1753 129.24      
5 A' 1484 1432 24.53      
6 A' 1448 1398 60.90      
7 A' 1397 1349 23.90      
8 A' 1309 1263 42.05      
9 A' 1140 1101 76.04      
10 A' 867 836 46.11      
11 A' 769 742 8.64      
12 A' 297 287 23.28      
13 A" 2974 2870 27.62      
14 A" 1245 1201 1.83      
15 A" 1112 1073 0.10      
16 A" 724 698 0.31      
17 A" 422 407 74.44      
18 A" 217 210 2.81      

Unscaled Zero Point Vibrational Energy (zpe) 13404.4 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 12935.3 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 B3LYP/6-31G(2df,p)
ABC
0.61583 0.21980 0.16701

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/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 0.925 -0.259 0.000
O3 -1.342 0.552 0.000
O4 0.500 -1.389 0.000
H5 -1.334 -0.418 0.000
H6 0.251 1.551 0.881
H7 0.251 1.551 -0.881
H8 2.013 -0.041 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.50941.39472.37541.89861.10451.10452.2370
C21.50942.40781.20732.26472.12272.12271.1094
O31.39472.40782.67550.97012.07572.07573.4071
O42.37541.20732.67552.07473.07873.07872.0263
H51.89862.26470.97012.07472.67622.67623.3681
H61.10452.12272.07573.07872.67621.76182.5333
H71.10452.12272.07573.07872.67621.76182.5333
H82.23701.10943.40712.02633.36812.53332.5333

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 121.759 C1 C2 H8 116.024
C1 O3 H5 105.846 C2 C1 O3 112.033
C2 C1 H6 107.526 C2 C1 H7 107.526
O3 C1 H6 111.681 O3 C1 H7 111.681
O4 C2 H8 122.217 H6 C1 H7 106.080
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.116      
2 C 0.140      
3 O -0.413      
4 O -0.249      
5 H 0.297      
6 H 0.121      
7 H 0.121      
8 H 0.098      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.817 1.244 0.000 2.202
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 72.530
(<r2>)1/2 8.516