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: PBEPBE/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 PBEPBE/6-311G*
 hartrees
Energy at 0K-6998.041816
Energy at 298.15K 
HF Energy-6998.041816
Nuclear repulsion energy212.067707
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 PBEPBE/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' 3044 3012 24.21 79.25 0.24 0.39
2 A' 3030 2999 0.06 130.79 0.37 0.54
3 A' 2964 2933 25.10 250.29 0.13 0.23
4 A' 1469 1453 3.39 10.73 0.75 0.85
5 A' 1445 1430 1.94 8.53 0.71 0.83
6 A' 1376 1361 7.55 6.28 0.70 0.82
7 A' 1210 1198 80.18 11.77 0.42 0.60
8 A' 1052 1041 0.08 5.30 0.73 0.84
9 A' 952 942 19.38 6.08 0.57 0.72
10 A' 482 477 7.82 26.76 0.27 0.42
11 A' 249 246 1.75 3.85 0.41 0.58
12 A" 3102 3070 8.79 33.13 0.75 0.86
13 A" 3061 3030 9.37 84.45 0.75 0.86
14 A" 1453 1438 13.47 12.02 0.75 0.86
15 A" 1231 1218 0.68 1.66 0.75 0.86
16 A" 977 967 0.23 5.05 0.75 0.86
17 A" 732 725 7.21 0.27 0.75 0.86
18 A" 260 257 0.01 0.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14043.6 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 13897.6 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 PBEPBE/6-311G*
ABC
0.97464 0.09592 0.09032

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.608 -1.465 0.000
C2 -0.580 -2.407 0.000
I3 0.000 0.648 0.000
H4 1.234 -1.569 0.893
H5 1.234 -1.569 -0.893
H6 -0.216 -3.450 0.000
H7 -1.210 -2.270 0.890
H8 -1.210 -2.270 -0.890

Atom - Atom Distances (Å)
  C1 C2 I3 H4 H5 H6 H7 H8
C11.51612.19911.09621.09622.14892.17842.1784
C21.51613.11012.18932.18931.10441.09921.0992
I32.19913.11012.69032.69034.10393.28233.2823
H41.09622.18932.69031.78682.53772.54333.1062
H51.09622.18932.69031.78682.53773.10622.5433
H62.14891.10444.10392.53772.53771.78131.7813
H72.17841.09923.28232.54333.10621.78131.7799
H82.17841.09923.28233.10622.54331.78131.7799

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 109.174 C1 C2 H7 111.822
C1 C2 H8 111.822 C2 C1 I3 112.376
C2 C1 H4 112.894 C2 C1 H5 112.894
I3 C1 H4 104.416 I3 C1 H5 104.416
H4 C1 H5 109.180 H6 C2 H7 107.872
H6 C2 H8 107.872 H7 C2 H8 108.125
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.605      
2 C -0.624      
3 I -0.011      
4 H 0.269      
5 H 0.269      
6 H 0.225      
7 H 0.239      
8 H 0.239      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.419 -2.138 0.000 2.178
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.616 -1.353 0.000
y -1.353 -38.378 0.000
z 0.000 0.000 -42.959
Traceless
 xyz
x -1.947 -1.353 0.000
y -1.353 4.409 0.000
z 0.000 0.000 -2.462
Polar
3z2-r2-4.924
x2-y2-4.237
xy-1.353
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.169 -0.203 0.000
y -0.203 10.507 0.000
z 0.000 0.000 5.742


<r2> (average value of r2) Å2
<r2> 136.300
(<r2>)1/2 11.675