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

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-2638.492821
Energy at 298.15K 
HF Energy-2638.271217
Nuclear repulsion energy160.943894
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 MP2/3-21G
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' 3168 3023 24.70      
2 A' 3154 3011 0.45      
3 A' 3090 2949 12.79      
4 A' 1601 1528 3.48      
5 A' 1573 1501 4.36      
6 A' 1504 1435 5.41      
7 A' 1358 1296 50.20      
8 A' 1106 1055 2.71      
9 A' 998 952 10.79      
10 A' 579 553 8.81      
11 A' 291 278 1.51      
12 A" 3226 3079 11.73      
13 A" 3179 3034 8.15      
14 A" 1591 1519 7.42      
15 A" 1346 1284 0.63      
16 A" 1086 1037 0.00      
17 A" 802 766 6.38      
18 A" 269 256 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 14959.0 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 14278.4 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 MP2/3-21G
ABC
0.98526 0.12101 0.11235

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.582 -2.068 0.000
C2 0.611 -1.105 0.000
Br3 0.000 0.812 0.000
H4 1.226 -1.220 0.891
H5 1.226 -1.220 -0.891
H6 -0.216 -3.101 0.000
H7 -1.202 -1.914 0.888
H8 -1.202 -1.914 -0.888

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.53302.93782.18692.18691.09661.09331.0933
C21.53302.01181.08911.08912.16052.17442.1744
Br32.93782.01182.53502.53503.91903.10863.1086
H42.18691.08912.53501.78272.53212.52503.0887
H52.18691.08912.53501.78272.53213.08872.5250
H61.09662.16053.91902.53212.53211.78021.7802
H71.09332.17443.10862.52503.08871.78021.7751
H81.09332.17443.10863.08872.52501.78021.7751

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 111.230 C1 C2 H4 111.913
C1 C2 H5 111.913 C2 C1 H6 109.376
C2 C1 H7 110.662 C2 C1 H8 110.662
Br3 C2 H4 105.794 Br3 C2 H5 105.794
H4 C2 H5 109.849 H6 C1 H7 108.770
H6 C1 H8 108.770 H7 C1 H8 108.555
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability