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: CCSD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD/Def2TZVPP
 hartrees
Energy at 0K-376.192096
Energy at 298.15K 
HF Energy-375.339531
Nuclear repulsion energy121.508443
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 CCSD/Def2TZVPP
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' 3137 3137 22.25      
2 A' 3124 3124 0.34      
3 A' 3058 3058 21.82      
4 A' 1515 1515 1.39      
5 A' 1496 1496 1.09      
6 A' 1435 1435 3.53      
7 A' 1267 1267 68.54      
8 A' 1086 1086 0.13      
9 A' 989 989 7.36      
10 A' 539 539 4.77      
11 A' 264 264 0.47      
12 A" 3195 3195 4.86      
13 A" 3148 3148 8.83      
14 A" 1508 1508 9.26      
15 A" 1280 1280 0.29      
16 A" 1013 1013 0.51      
17 A" 754 754 3.97      
18 A" 262 262 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14535.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14535.0 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 CCSD/Def2TZVPP
ABC
0.98356 0.10028 0.09420

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.609 -1.419 0.000
C2 -0.580 -2.362 0.000
I3 0.000 0.633 0.000
H4 1.226 -1.534 0.884
H5 1.226 -1.534 -0.884
H6 -0.226 -3.395 0.000
H7 -1.200 -2.212 0.882
H8 -1.200 -2.212 -0.882

Atom - Atom Distances (Å)
  C1 C2 I3 H4 H5 H6 H7 H8
C11.51682.14061.08461.08462.14472.16272.1627
C21.51683.05052.17412.17411.09201.08861.0886
I32.14063.05052.64272.64274.03433.21123.2112
H41.08462.17412.64271.76852.52002.51893.0764
H51.08462.17412.64271.76852.52003.07642.5189
H62.14471.09204.03432.52002.52001.76821.7682
H72.16271.08863.21122.51893.07641.76821.7638
H82.16271.08863.21123.07642.51891.76821.7638

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 109.515 C1 C2 H7 111.155
C1 C2 H8 111.155 C2 C1 I3 111.906
C2 C1 H4 112.323 C2 C1 H5 112.323
I3 C1 H4 105.301 I3 C1 H5 105.301
H4 C1 H5 109.222 H6 C2 H7 108.359
H6 C2 H8 108.359 H7 C2 H8 108.211
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability