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: HSEh1PBE/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at HSEh1PBE/6-31G
 hartrees
Energy at 0K-154.162522
Energy at 298.15K-154.167536
HF Energy-154.162522
Nuclear repulsion energy73.516686
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 HSEh1PBE/6-31G
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' 3163 3026 21.33      
2 A' 3074 2941 13.31      
3 A' 2984 2855 25.70      
4 A' 1542 1475 9.97      
5 A' 1462 1398 20.03      
6 A' 1459 1395 16.75      
7 A' 1386 1326 3.60      
8 A' 1137 1088 9.13      
9 A' 1079 1032 13.83      
10 A' 900 861 0.16      
11 A' 426 408 7.82      
12 A" 3173 3036 19.81      
13 A" 3015 2885 5.62      
14 A" 1533 1467 7.29      
15 A" 1282 1226 0.53      
16 A" 909 870 0.15      
17 A" 314 300 32.16      
18 A" 151 145 9.14      

Unscaled Zero Point Vibrational Energy (zpe) 14494.8 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 13865.7 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 HSEh1PBE/6-31G
ABC
1.28604 0.31558 0.27963

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.066 -0.556 0.000
C2 0.000 0.525 0.000
O3 -1.324 0.037 0.000
H4 2.069 -0.115 0.000
H5 0.969 -1.191 0.886
H6 0.969 -1.191 -0.886
H7 0.094 1.194 0.874
H8 0.094 1.194 -0.874

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8
C11.51782.46231.09541.09411.09412.18412.1841
C21.51781.41072.16562.16022.16021.10471.1047
O32.46231.41073.39622.74782.74782.02752.0275
H41.09542.16563.39621.77491.77492.52572.5257
H51.09412.16022.74781.77491.77132.54033.0902
H61.09412.16022.74781.77491.77133.09022.5403
H72.18411.10472.02752.52572.54033.09021.7479
H82.18411.10472.02752.52573.09022.54031.7479

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 114.401 C1 C2 H7 111.818
C1 C2 H8 111.818 C2 C1 H4 110.906
C2 C1 H5 110.551 C2 C1 H6 110.551
O3 C2 H7 106.789 O3 C2 H8 106.789
H4 C1 H5 108.325 H4 C1 H6 108.325
H5 C1 H6 108.091 H7 C2 H8 104.582
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.488      
2 C -0.130      
3 O -0.310      
4 H 0.160      
5 H 0.182      
6 H 0.182      
7 H 0.202      
8 H 0.202      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.136 0.802 0.000 2.282
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.464 -0.029 0.000
y -0.029 -18.357 0.000
z 0.000 0.000 -17.853
Traceless
 xyz
x -4.359 -0.029 0.000
y -0.029 1.802 0.000
z 0.000 0.000 2.558
Polar
3z2-r25.115
x2-y2-4.107
xy-0.029
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.040 0.128 0.000
y 0.128 3.481 0.000
z 0.000 0.000 3.623


<r2> (average value of r2) Å2
<r2> 51.542
(<r2>)1/2 7.179