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

using model chemistry: QCISD(T)/aug-cc-pVTZ

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)/aug-cc-pVTZ
 hartrees
Energy at 0K-2651.801213
Energy at 298.15K 
HF Energy-2651.143366
Nuclear repulsion energy164.397215
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)/aug-cc-pVTZ
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' 3112 3009        
2 A' 3096 2993        
3 A' 3034 2933        
4 A' 1508 1458        
5 A' 1497 1447        
6 A' 1419 1372        
7 A' 1287 1244        
8 A' 1089 1053        
9 A' 986 953        
10 A' 589 570        
11 A' 287 277        
12 A" 3163 3058        
13 A" 3124 3020        
14 A" 1498 1448        
15 A" 1272 1230        
16 A" 1042 1008        
17 A" 774 748        
18 A" 259 251        

Unscaled Zero Point Vibrational Energy (zpe) 14516.5 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 14034.5 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)/aug-cc-pVTZ
ABC
1.00028 0.12725 0.11789

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.577 -2.020 0.000
C2 0.604 -1.067 0.000
Br3 0.000 0.790 0.000
H4 1.222 -1.172 0.889
H5 1.222 -1.172 -0.889
H6 -0.213 -3.052 0.000
H7 -1.197 -1.869 0.885
H8 -1.197 -1.869 -0.885

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51712.86852.17802.17801.09411.09121.0912
C21.51711.95291.08771.08772.14612.16052.1605
Br32.86851.95292.47692.47693.84773.04713.0471
H42.17801.08772.47691.77752.52592.51683.0792
H52.17801.08772.47691.77752.52593.07922.5168
H61.09412.14613.84772.52592.52591.77501.7750
H71.09122.16053.04712.51683.07921.77501.7705
H81.09122.16053.04713.07922.51681.77501.7705

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 110.892 C1 C2 H4 112.421
C1 C2 H5 112.421 C2 C1 H6 109.476
C2 C1 H7 110.798 C2 C1 H8 110.798
Br3 C2 H4 105.538 Br3 C2 H5 105.538
H4 C2 H5 109.590 H6 C1 H7 108.632
H6 C1 H8 108.632 H7 C1 H8 108.446
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability