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: LSDA/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at LSDA/cc-pVTZ-PP
 hartrees
Energy at 0K-374.620241
Energy at 298.15K 
HF Energy-374.620241
Nuclear repulsion energy121.783694
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 LSDA/cc-pVTZ-PP
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' 3041 3041 7.64 99.55 0.44 0.61
2 A' 3025 3025 0.86 123.35 0.22 0.36
3 A' 2960 2960 13.60 276.28 0.09 0.17
4 A' 1420 1420 3.45 7.97 0.75 0.86
5 A' 1406 1406 2.74 5.03 0.75 0.86
6 A' 1339 1339 12.44 5.24 0.61 0.76
7 A' 1175 1175 55.25 13.09 0.36 0.53
8 A' 1075 1075 0.95 4.04 0.72 0.84
9 A' 944 944 16.26 4.85 0.48 0.65
10 A' 524 524 4.65 23.65 0.21 0.35
11 A' 252 252 1.28 3.28 0.31 0.47
12 A" 3095 3095 0.94 30.53 0.75 0.86
13 A" 3057 3057 3.75 77.62 0.75 0.86
14 A" 1403 1403 15.43 8.67 0.75 0.86
15 A" 1204 1204 0.41 0.54 0.75 0.86
16 A" 950 950 0.00 3.25 0.75 0.86
17 A" 723 723 6.33 0.06 0.75 0.86
18 A" 256 256 0.00 0.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13923.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13923.7 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 LSDA/cc-pVTZ-PP
ABC
0.98582 0.10113 0.09502

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/cc-pVTZ-PP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.604 -1.426 0.000
C2 -0.574 -2.342 0.000
I3 0.000 0.631 0.000
H4 1.230 -1.530 0.893
H5 1.230 -1.530 -0.893
H6 -0.231 -3.390 0.000
H7 -1.203 -2.191 0.888
H8 -1.203 -2.191 -0.888

Atom - Atom Distances (Å)
  C1 C2 I3 H4 H5 H6 H7 H8
C11.49202.14371.09551.09552.13432.15342.1534
C21.49203.02812.17042.17041.10241.09841.0984
I32.14373.02812.64212.64214.02783.19393.1939
H41.09552.17042.64211.78512.52832.52133.0865
H51.09552.17042.64211.78512.52833.08652.5213
H62.13431.10244.02782.52832.52831.78011.7801
H72.15341.09843.19392.52133.08651.78011.7754
H82.15341.09843.19393.08652.52131.78011.7754

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 109.790 C1 C2 H7 111.568
C1 C2 H8 111.568 C2 C1 I3 111.538
C2 C1 H4 113.140 C2 C1 H5 113.140
I3 C1 H4 104.615 I3 C1 H5 104.615
H4 C1 H5 109.122 H6 C2 H7 107.969
H6 C2 H8 107.969 H7 C2 H8 107.837
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/cc-pVTZ-PP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.278      
2 C -0.345      
3 I -0.073      
4 H 0.151      
5 H 0.151      
6 H 0.125      
7 H 0.134      
8 H 0.134      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.368 -1.934 0.000 1.969
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -40.999 -1.241 0.000
y -1.241 -37.160 0.000
z 0.000 0.000 -41.296
Traceless
 xyz
x -1.771 -1.241 0.000
y -1.241 3.987 0.000
z 0.000 0.000 -2.216
Polar
3z2-r2-4.433
x2-y2-3.839
xy-1.241
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.258 -0.054 0.000
y -0.054 10.955 0.000
z 0.000 0.000 6.855


<r2> (average value of r2) Å2
<r2> 119.026
(<r2>)1/2 10.910