return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B3PW91/3-21G*

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 B3PW91/3-21G*
 hartrees
Energy at 0K-227.677617
Energy at 298.15K-227.682651
Nuclear repulsion energy118.644947
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 B3PW91/3-21G*
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' 3366 3230 33.69      
2 A' 3013 2891 87.27      
3 A' 2986 2865 12.10      
4 A' 1721 1651 62.22      
5 A' 1535 1473 13.15      
6 A' 1471 1412 120.69      
7 A' 1411 1354 14.23      
8 A' 1307 1254 54.04      
9 A' 1074 1031 44.90      
10 A' 854 819 48.25      
11 A' 767 736 6.51      
12 A' 303 291 27.16      
13 A" 3007 2885 27.83      
14 A" 1241 1191 9.79      
15 A" 1118 1073 0.01      
16 A" 776 744 0.41      
17 A" 495 475 103.20      
18 A" 225 215 5.01      

Unscaled Zero Point Vibrational Energy (zpe) 13335.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 12793.6 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 B3PW91/3-21G*
ABC
0.58067 0.22407 0.16673

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.957 0.000
C2 0.943 -0.226 0.000
O3 -1.358 0.499 0.000
O4 0.500 -1.379 0.000
H5 -1.274 -0.501 0.000
H6 0.230 1.574 0.886
H7 0.230 1.574 -0.886
H8 2.020 0.001 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.51241.43302.38841.93621.10371.10372.2349
C21.51242.41211.23502.23382.12902.12901.1009
O31.43302.41212.64141.00352.11232.11233.4146
O42.38841.23502.64141.97923.09473.09472.0527
H51.93622.23381.00351.97922.71172.71173.3322
H61.10372.12902.11233.09472.71171.77112.5427
H71.10372.12902.11233.09472.71171.77112.5427
H82.23491.10093.41462.05273.33222.54272.5427

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 120.431 C1 C2 H8 116.685
C1 O3 H5 103.841 C2 C1 O3 109.926
C2 C1 H6 107.916 C2 C1 H7 107.916
O3 C1 H6 112.092 O3 C1 H7 112.092
O4 C2 H8 122.884 H6 C1 H7 106.699
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.237      
2 C 0.191      
3 O -0.573      
4 O -0.416      
5 H 0.358      
6 H 0.235      
7 H 0.235      
8 H 0.207      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.368 1.144 0.000 2.630
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.477 4.138 0.000
y 4.138 -25.577 0.000
z 0.000 0.000 -22.863
Traceless
 xyz
x -0.257 4.138 0.000
y 4.138 -1.907 0.000
z 0.000 0.000 2.164
Polar
3z2-r24.328
x2-y21.100
xy4.138
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.077 0.297 0.000
y 0.297 4.559 0.000
z 0.000 0.000 2.330


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000