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All results from a given calculation for C2H5I (Ethyl iodide)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-25.059848
Energy at 298.15K 
HF Energy-25.059848
Nuclear repulsion energy39.838974
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/CEP-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' 3306 2980 82.94 139.87 0.07 0.13
2 A' 3292 2967 6.52 147.52 0.49 0.66
3 A' 3211 2895 59.54 217.79 0.08 0.15
4 A' 1634 1472 3.90 20.40 0.73 0.85
5 A' 1614 1455 3.63 21.95 0.57 0.72
6 A' 1562 1408 3.58 5.71 0.67 0.80
7 A' 1379 1243 147.08 23.21 0.42 0.59
8 A' 1160 1046 1.41 12.32 0.52 0.69
9 A' 1057 953 16.18 10.06 0.71 0.83
10 A' 503 454 31.22 65.20 0.35 0.52
11 A' 269 242 2.92 9.66 0.52 0.69
12 A" 3391 3056 28.76 67.08 0.75 0.86
13 A" 3323 2995 42.47 80.66 0.75 0.86
14 A" 1622 1462 10.04 25.67 0.75 0.86
15 A" 1368 1233 1.21 12.13 0.75 0.86
16 A" 1100 992 1.00 12.61 0.75 0.86
17 A" 826 744 10.08 5.64 0.75 0.86
18 A" 258 233 0.00 0.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15436.8 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 13914.8 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/CEP-31G
ABC
0.96521 0.09530 0.08964

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.618 -1.467 0.000
C2 -0.588 -2.420 0.000
I3 0.000 0.650 0.000
H4 1.230 -1.568 0.887
H5 1.230 -1.568 -0.887
H6 -0.223 -3.450 0.000
H7 -1.208 -2.277 0.883
H8 -1.208 -2.277 -0.883

Atom - Atom Distances (Å)
  C1 C2 I3 H4 H5 H6 H7 H8
C11.53792.20511.08251.08252.15422.18382.1838
C21.53793.12652.19562.19561.09251.08781.0878
I32.20513.12652.68712.68714.10623.28733.2873
H41.08252.19562.68711.77382.53762.53913.0948
H51.08252.19562.68711.77382.53763.09482.5391
H62.15421.09254.10622.53762.53761.76781.7678
H72.18381.08783.28732.53913.09481.76781.7651
H82.18381.08783.28733.09482.53911.76781.7651

picture of Ethyl iodide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 108.783 C1 C2 H7 111.402
C1 C2 H8 111.402 C2 C1 I3 112.064
C2 C1 H4 112.681 C2 C1 H5 112.681
I3 C1 H4 104.384 I3 C1 H5 104.384
H4 C1 H5 110.029 H6 C2 H7 108.354
H6 C2 H8 108.354 H7 C2 H8 108.453
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.519      
2 C -0.225      
3 I 0.019      
4 H 0.175      
5 H 0.175      
6 H 0.116      
7 H 0.130      
8 H 0.130      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.494 -2.611 0.000 2.657
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.534 -1.452 0.000
y -1.452 -30.465 0.000
z 0.000 0.000 -34.837
Traceless
 xyz
x -1.883 -1.452 0.000
y -1.452 4.221 0.000
z 0.000 0.000 -2.338
Polar
3z2-r2-4.676
x2-y2-4.069
xy-1.452
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.993 -0.975 0.000
y -0.975 9.793 0.000
z 0.000 0.000 3.276


<r2> (average value of r2) Å2
<r2> 95.008
(<r2>)1/2 9.747