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: MP4/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 MP4/Def2TZVPP
 hartrees
Energy at 0K-376.221724
Energy at 298.15K 
HF Energy-375.339421
Nuclear repulsion energy121.334449
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 MP4/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' 3118 3118        
2 A' 3099 3099        
3 A' 3039 3039        
4 A' 1500 1500        
5 A' 1475 1475        
6 A' 1413 1413        
7 A' 1244 1244        
8 A' 1071 1071        
9 A' 975 975        
10 A' 531 531        
11 A' 260 260        
12 A" 3169 3169        
13 A" 3133 3133        
14 A" 1492 1492        
15 A" 1262 1262        
16 A" 996 996        
17 A" 743 743        
18 A" 260 260        

Unscaled Zero Point Vibrational Energy (zpe) 14389.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14389.8 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 MP4/Def2TZVPP
ABC
0.97722 0.10012 0.09402

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.611 -1.422 0.000
C2 -0.582 -2.362 0.000
I3 0.000 0.634 0.000
H4 1.229 -1.537 0.887
H5 1.229 -1.537 -0.887
H6 -0.230 -3.398 0.000
H7 -1.202 -2.208 0.884
H8 -1.202 -2.208 -0.884

Atom - Atom Distances (Å)
  C1 C2 I3 H4 H5 H6 H7 H8
C11.51892.14501.08731.08732.14752.16472.1647
C21.51893.05222.17912.17911.09381.09031.0903
I32.14503.05222.64802.64804.03853.21003.2100
H41.08732.17912.64801.77402.52582.52233.0817
H51.08732.17912.64801.77402.52583.08172.5223
H62.14751.09384.03852.52582.52581.77211.7721
H72.16471.09033.21002.52233.08171.77211.7670
H82.16471.09033.21003.08172.52231.77211.7670

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 109.485 C1 C2 H7 111.057
C1 C2 H8 111.057 C2 C1 I3 111.688
C2 C1 H4 112.404 C2 C1 H5 112.404
I3 C1 H4 105.272 I3 C1 H5 105.272
H4 C1 H5 109.326 H6 C2 H7 108.456
H6 C2 H8 108.456 H7 C2 H8 108.252
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability