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 C2H5I (Ethyl iodide)

using model chemistry: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-6998.843356
Energy at 298.15K 
HF Energy-6998.843356
Nuclear repulsion energy213.469825
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 B3PW91/6-311G*
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' 3117 3001 25.69 78.36 0.21 0.35
2 A' 3104 2988 0.13 124.22 0.41 0.58
3 A' 3036 2923 26.18 214.87 0.12 0.21
4 A' 1511 1455 3.23 10.17 0.75 0.85
5 A' 1490 1434 2.34 8.35 0.69 0.81
6 A' 1421 1368 7.04 4.74 0.72 0.84
7 A' 1257 1210 84.30 12.16 0.42 0.59
8 A' 1080 1040 0.12 4.56 0.67 0.80
9 A' 980 943 16.91 5.40 0.63 0.78
10 A' 505 486 8.42 29.02 0.28 0.43
11 A' 257 248 1.51 3.54 0.41 0.58
12 A" 3177 3058 8.02 35.32 0.75 0.86
13 A" 3134 3017 10.37 78.65 0.75 0.86
14 A" 1499 1443 13.18 11.87 0.75 0.86
15 A" 1269 1222 0.69 1.94 0.75 0.86
16 A" 1011 974 0.30 4.55 0.75 0.86
17 A" 753 725 7.26 0.28 0.75 0.86
18 A" 265 255 0.01 0.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14431.8 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 13893.5 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 B3PW91/6-311G*
ABC
0.98583 0.09716 0.09148

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.605 -1.451 0.000
C2 -0.577 -2.394 0.000
I3 0.000 0.644 0.000
H4 1.227 -1.560 0.887
H5 1.227 -1.560 -0.887
H6 -0.213 -3.428 0.000
H7 -1.203 -2.258 0.884
H8 -1.203 -2.258 -0.884

Atom - Atom Distances (Å)
  C1 C2 I3 H4 H5 H6 H7 H8
C11.51212.18101.08861.08862.13962.16822.1682
C21.51213.09252.17692.17691.09651.09181.0918
I32.18103.09252.67362.67364.07803.26333.2633
H41.08862.17692.67361.77312.52072.52883.0871
H51.08862.17692.67361.77312.52073.08712.5288
H62.13961.09654.07802.52072.52071.76981.7698
H72.16821.09183.26332.52883.08711.76981.7682
H82.16821.09183.26333.08712.52881.76981.7682

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 109.177 C1 C2 H7 111.737
C1 C2 H8 111.737 C2 C1 I3 112.466
C2 C1 H4 112.648 C2 C1 H5 112.648
I3 C1 H4 104.717 I3 C1 H5 104.717
H4 C1 H5 109.055 H6 C2 H7 107.948
H6 C2 H8 107.948 H7 C2 H8 108.150
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.615      
2 C -0.637      
3 I -0.015      
4 H 0.274      
5 H 0.274      
6 H 0.230      
7 H 0.244      
8 H 0.244      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.434 -2.178 0.000 2.221
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.348 -1.386 0.000
y -1.386 -38.191 0.000
z 0.000 0.000 -42.688
Traceless
 xyz
x -1.909 -1.386 0.000
y -1.386 4.327 0.000
z 0.000 0.000 -2.418
Polar
3z2-r2-4.837
x2-y2-4.157
xy-1.386
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.995 -0.258 0.000
y -0.258 10.144 0.000
z 0.000 0.000 5.592


<r2> (average value of r2) Å2
<r2> 134.764
(<r2>)1/2 11.609