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/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-154.376414
Energy at 298.15K-154.381441
HF Energy-154.376414
Nuclear repulsion energy74.467716
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/cc-pVTZ
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' 3138 3000 20.63      
2 A' 3060 2926 13.04      
3 A' 2923 2794 24.79      
4 A' 1492 1427 5.97      
5 A' 1413 1351 26.80      
6 A' 1391 1330 16.97      
7 A' 1342 1283 10.24      
8 A' 1106 1057 4.68      
9 A' 1099 1051 15.44      
10 A' 902 862 0.54      
11 A' 438 419 6.86      
12 A" 3146 3008 18.69      
13 A" 2937 2808 6.48      
14 A" 1484 1419 6.25      
15 A" 1240 1185 0.05      
16 A" 862 824 0.00      
17 A" 310 296 24.20      
18 A" 160 153 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 14221.8 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 13596.0 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 wB97X-D/cc-pVTZ
ABC
1.33849 0.32115 0.28603

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.047 -0.585 0.000
C2 0.000 0.518 0.000
O3 -1.302 0.079 0.000
H4 2.054 -0.165 0.000
H5 0.935 -1.212 0.883
H6 0.935 -1.212 -0.883
H7 0.106 1.181 0.871
H8 0.106 1.181 -0.871

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8
C11.52022.44101.09131.08921.08922.18192.1819
C21.52021.37402.16472.15532.15531.09981.0998
O32.44101.37403.36532.72962.72961.98861.9886
H41.09132.16473.36531.76911.76912.52302.5230
H51.08922.15532.72961.76911.76672.53213.0804
H61.08922.15532.72961.76911.76673.08042.5321
H72.18191.09981.98862.52302.53213.08041.7420
H82.18191.09981.98862.52303.08042.53211.7420

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 114.911 C1 C2 H7 111.770
C1 C2 H8 111.770 C2 C1 H4 110.905
C2 C1 H5 110.281 C2 C1 H6 110.281
O3 C2 H7 106.479 O3 C2 H8 106.479
H4 C1 H5 108.455 H4 C1 H6 108.455
H5 C1 H6 108.394 H7 C2 H8 104.740
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.246      
2 C 0.043      
3 O -0.225      
4 H 0.073      
5 H 0.090      
6 H 0.090      
7 H 0.087      
8 H 0.087      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.925 0.645 0.000 2.030
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.118 0.242 0.000
y 0.242 -18.559 0.000
z 0.000 0.000 -17.937
Traceless
 xyz
x -3.869 0.242 0.000
y 0.242 1.468 0.000
z 0.000 0.000 2.401
Polar
3z2-r24.803
x2-y2-3.558
xy0.242
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.777 -0.009 0.000
y -0.009 4.306 0.000
z 0.000 0.000 4.106


<r2> (average value of r2) Å2
<r2> 50.764
(<r2>)1/2 7.125