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 CH3CH2O (Ethoxy radical)

using model chemistry: wB97X-D/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at wB97X-D/6-311G**
 hartrees
Energy at 0K-154.360683
Energy at 298.15K-154.365777
HF Energy-154.360683
Nuclear repulsion energy74.334278
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 wB97X-D/6-311G**
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' 3134 2998 23.75      
2 A' 3055 2922 14.42      
3 A' 2922 2795 28.77      
4 A' 1493 1428 6.86      
5 A' 1418 1356 29.87      
6 A' 1390 1329 17.00      
7 A' 1352 1293 9.81      
8 A' 1107 1059 3.46      
9 A' 1100 1052 17.70      
10 A' 903 864 0.38      
11 A' 438 419 7.56      
12 A" 3142 3006 22.01      
13 A" 2940 2812 9.19      
14 A" 1484 1420 7.07      
15 A" 1244 1189 0.18      
16 A" 872 835 0.00      
17 A" 338 324 26.05      
18 A" 183 175 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 14256.9 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 13636.7 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 wB97X-D/6-311G**
ABC
1.32863 0.32068 0.28536

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.048 -0.586 0.000
C2 0.000 0.520 0.000
O3 -1.303 0.079 0.000
H4 2.060 -0.169 0.000
H5 0.933 -1.215 0.885
H6 0.933 -1.215 -0.885
H7 0.106 1.184 0.873
H8 0.106 1.184 -0.873

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8
C11.52322.44321.09421.09191.09192.18672.1867
C21.52321.37582.17202.15942.15941.10231.1023
O32.44321.37583.37212.73102.73101.99241.9924
H41.09422.17203.37211.77351.77352.53212.5321
H51.09192.15942.73101.77351.77012.53763.0872
H61.09192.15942.73101.77351.77013.08722.5376
H72.18671.10231.99242.53212.53763.08721.7464
H82.18671.10231.99242.53213.08722.53761.7464

picture of Ethoxy radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 114.775 C1 C2 H7 111.795
C1 C2 H8 111.795 C2 C1 H4 111.102
C2 C1 H5 110.239 C2 C1 H6 110.239
O3 C2 H7 106.510 O3 C2 H8 106.510
H4 C1 H5 108.441 H4 C1 H6 108.441
H5 C1 H6 108.302 H7 C2 H8 104.778
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.337      
2 C -0.075      
3 O -0.235      
4 H 0.110      
5 H 0.127      
6 H 0.127      
7 H 0.142      
8 H 0.142      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.927 0.685 0.000 2.045
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.171 0.259 0.000
y 0.259 -18.539 0.000
z 0.000 0.000 -17.932
Traceless
 xyz
x -3.935 0.259 0.000
y 0.259 1.512 0.000
z 0.000 0.000 2.423
Polar
3z2-r24.845
x2-y2-3.632
xy0.259
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.408 0.015 0.000
y 0.015 3.997 0.000
z 0.000 0.000 3.894


<r2> (average value of r2) Å2
<r2> 50.876
(<r2>)1/2 7.133