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

using model chemistry: MP2/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 MP2/aug-cc-pVTZ
 hartrees
Energy at 0K-2651.743705
Energy at 298.15K 
HF Energy-2651.143360
Nuclear repulsion energy165.428756
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/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' 3160 3011 13.64 68.23 0.66 0.79
2 A' 3129 2982 7.72 115.93 0.09 0.16
3 A' 3071 2927 14.85 193.96 0.03 0.06
4 A' 1517 1446 2.09 2.62 0.75 0.86
5 A' 1505 1434 1.34 5.51 0.68 0.81
6 A' 1421 1354 4.79 0.56 0.72 0.84
7 A' 1296 1235 42.78 5.59 0.28 0.44
8 A' 1100 1049 0.04 4.68 0.11 0.20
9 A' 997 950 11.87 3.08 0.71 0.83
10 A' 614 585 10.42 18.49 0.16 0.28
11 A' 292 278 1.25 2.11 0.27 0.43
12 A" 3202 3051 5.36 20.45 0.75 0.86
13 A" 3173 3023 4.18 69.55 0.75 0.86
14 A" 1506 1435 9.79 4.88 0.75 0.86
15 A" 1280 1220 0.21 0.80 0.75 0.86
16 A" 1052 1003 0.13 1.01 0.75 0.86
17 A" 782 745 3.12 0.01 0.75 0.86
18 A" 267 254 0.02 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14680.4 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 13988.9 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 MP2/aug-cc-pVTZ
ABC
1.00800 0.12903 0.11950

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.574 -2.007 0.000
C2 0.601 -1.057 0.000
Br3 0.000 0.784 0.000
H4 1.219 -1.164 0.886
H5 1.219 -1.164 -0.886
H6 -0.212 -3.036 0.000
H7 -1.193 -1.856 0.883
H8 -1.193 -1.856 -0.883

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51112.84952.17042.17041.09121.08811.0881
C21.51111.93671.08561.08562.13972.15302.1530
Br32.84951.93672.46362.46363.82623.02893.0289
H42.17041.08562.46361.77182.51712.50913.0697
H52.17041.08562.46361.77182.51713.06972.5091
H61.09122.13973.82622.51712.51711.76981.7698
H71.08812.15303.02892.50913.06971.76981.7651
H81.08812.15303.02893.06972.50911.76981.7651

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 110.869 C1 C2 H4 112.367
C1 C2 H5 112.367 C2 C1 H6 109.560
C2 C1 H7 110.804 C2 C1 H8 110.804
Br3 C2 H4 105.724 Br3 C2 H5 105.724
H4 C2 H5 109.375 H6 C1 H7 108.602
H6 C1 H8 108.602 H7 C1 H8 108.409
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability