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

using model chemistry: QCISD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-2651.476247
Energy at 298.15K 
HF Energy-2651.033447
Nuclear repulsion energy163.488665
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/6-311G*
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' 3120 2987 30.19      
2 A' 3104 2972 5.94      
3 A' 3043 2914 20.81      
4 A' 1528 1463 3.38      
5 A' 1519 1454 1.55      
6 A' 1451 1389 7.02      
7 A' 1327 1270 55.10      
8 A' 1105 1058 0.27      
9 A' 999 957 11.71      
10 A' 587 562 13.33      
11 A' 295 283 1.53      
12 A" 3171 3036 15.34      
13 A" 3135 3002 8.78      
14 A" 1518 1453 10.07      
15 A" 1294 1239 0.87      
16 A" 1071 1025 0.61      
17 A" 786 753 4.40      
18 A" 274 262 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 14663.6 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 14038.9 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/6-311G*
ABC
1.00112 0.12541 0.11635

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.576 -2.035 0.000
C2 0.602 -1.073 0.000
Br3 0.000 0.796 0.000
H4 1.224 -1.186 0.890
H5 1.224 -1.186 -0.890
H6 -0.203 -3.068 0.000
H7 -1.200 -1.893 0.887
H8 -1.200 -1.893 -0.887

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52042.88882.17942.17941.09791.09431.0943
C21.52041.96321.09151.09152.15132.16962.1696
Br32.88881.96322.49382.49383.86913.07553.0755
H42.17941.09152.49381.77902.52372.52533.0877
H52.17941.09152.49381.77902.52373.08772.5253
H61.09792.15133.86912.52372.52371.77791.7779
H71.09432.16963.07552.52533.08771.77791.7744
H81.09432.16963.07553.08772.52531.77791.7744

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 111.411 C1 C2 H4 112.068
C1 C2 H5 112.068 C2 C1 H6 109.443
C2 C1 H7 111.104 C2 C1 H8 111.104
Br3 C2 H4 105.886 Br3 C2 H5 105.886
H4 C2 H5 109.157 H6 C1 H7 108.386
H6 C1 H8 108.386 H7 C1 H8 108.336
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability