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All results from a given calculation for C2H5Br (Ethyl bromide)

using model chemistry: QCISD(T)/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 QCISD(T)/cc-pVTZ-PP
 hartrees
Energy at 0K-494.828388
Energy at 298.15K 
HF Energy-494.187647
Nuclear repulsion energy127.931634
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 QCISD(T)/cc-pVTZ-PP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3116 3116        
2 A' 3099 3099        
3 A' 3039 3039        
4 A' 1504 1504        
5 A' 1489 1489        
6 A' 1413 1413        
7 A' 1285 1285        
8 A' 1086 1086        
9 A' 983 983        
10 A' 588 588        
11 A' 286 286        
12 A" 3165 3165        
13 A" 3131 3131        
14 A" 1493 1493        
15 A" 1270 1270        
16 A" 1037 1037        
17 A" 771 771        
18 A" 263 263        

Unscaled Zero Point Vibrational Energy (zpe) 14509.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14509.1 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 QCISD(T)/cc-pVTZ-PP
ABC
1.00367 0.12704 0.11775

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.576 -2.022 0.000
C2 0.602 -1.066 0.000
Br3 0.000 0.791 0.000
H4 1.221 -1.174 0.887
H5 1.221 -1.174 -0.887
H6 -0.209 -3.052 0.000
H7 -1.196 -1.875 0.884
H8 -1.196 -1.875 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51682.87102.17572.17571.09381.09011.0901
C21.51681.95221.08721.08722.14552.16122.1612
Br32.87101.95222.47802.47803.84893.05313.0531
H42.17571.08722.47801.77472.52172.51683.0778
H52.17571.08722.47801.77472.52173.07782.5168
H61.09382.14553.84892.52172.52171.77241.7724
H71.09012.16123.05312.51683.07781.77241.7686
H81.09012.16123.05313.07782.51681.77241.7686

picture of Ethyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 111.088 C1 C2 H4 112.287
C1 C2 H5 112.287 C2 C1 H6 109.469
C2 C1 H7 110.937 C2 C1 H8 110.937
Br3 C2 H4 105.681 Br3 C2 H5 105.681
H4 C2 H5 109.408 H6 C1 H7 108.504
H6 C1 H8 108.504 H7 C1 H8 108.420
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability