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All results from a given calculation for C2H5OO (ethylperoxy radical)

using model chemistry: HF/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at HF/3-21G
 hartrees
Energy at 0K-226.995245
Energy at 298.15K-227.001284
HF Energy-226.995245
Nuclear repulsion energy121.305544
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 HF/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' 3282 2972 25.14      
2 A' 3254 2947 11.72      
3 A' 3217 2913 12.04      
4 A' 1694 1534 4.86      
5 A' 1672 1514 6.10      
6 A' 1578 1429 11.65      
7 A' 1524 1380 21.09      
8 A' 1247 1129 23.30      
9 A' 1074 973 32.32      
10 A' 966 875 12.55      
11 A' 813 736 3.00      
12 A' 491 445 5.78      
13 A' 305 276 0.69      
14 A" 3314 3001 46.39      
15 A" 3284 2974 0.36      
16 A" 1656 1500 6.56      
17 A" 1411 1278 0.15      
18 A" 1276 1156 7.07      
19 A" 915 829 1.17      
20 A" 243 220 0.95      
21 A" 101 92 0.52      

Unscaled Zero Point Vibrational Energy (zpe) 16657.5 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 15085.1 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 HF/3-21G
ABC
1.07061 0.14289 0.13225

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.504 0.931 0.000
C2 0.000 0.682 0.000
O3 -0.156 -0.777 0.000
O4 -1.555 -1.074 0.000
H5 1.704 1.995 0.000
H6 1.954 0.488 0.879
H7 1.954 0.488 -0.879
H8 -0.475 1.081 -0.883
H9 -0.475 1.081 0.883

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9
C11.52442.38153.65761.08341.08181.08182.17182.1718
C21.52441.46802.34602.15122.15102.15101.07871.0787
O32.38151.46801.43083.33862.61212.61212.08222.0822
O43.65762.34601.43084.47713.94023.94022.56762.5676
H51.08342.15123.33864.47711.76251.76252.52212.5221
H61.08182.15102.61213.94021.76251.75803.05792.4995
H71.08182.15102.61213.94021.76251.75802.49953.0579
H82.17181.07872.08222.56762.52213.05792.49951.7655
H92.17181.07872.08222.56762.52212.49953.05791.7655

picture of ethylperoxy radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 105.457 C1 C2 H8 111.953
C1 C2 H9 111.953 C2 C1 H5 110.011
C2 C1 H6 110.083 C2 C1 H7 110.083
C2 O3 O4 108.052 O3 C2 H8 108.728
O3 C2 H9 108.728 H5 C1 H6 108.975
H5 C1 H7 108.975 H6 C1 H7 108.680
H8 C2 H9 109.841
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.631      
2 C -0.093      
3 O -0.368      
4 O -0.034      
5 H 0.213      
6 H 0.233      
7 H 0.233      
8 H 0.223      
9 H 0.223      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.770 2.544 0.000 2.658
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.623 -0.440 0.000
y -0.440 -25.257 0.000
z 0.000 0.000 -23.249
Traceless
 xyz
x -0.370 -0.440 0.000
y -0.440 -1.321 0.000
z 0.000 0.000 1.691
Polar
3z2-r23.382
x2-y20.634
xy-0.440
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.815 0.870 0.000
y 0.870 3.787 0.000
z 0.000 0.000 3.213


<r2> (average value of r2) Å2
<r2> 91.283
(<r2>)1/2 9.554