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

using model chemistry: MP2=FULL/cc-pVQZ

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=FULL/cc-pVQZ
 hartrees
Energy at 0K-2651.969912
Energy at 298.15K 
HF Energy-2651.150546
Nuclear repulsion energy166.077015
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=FULL/cc-pVQZ
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' 3181 3045 12.28 69.79 0.67 0.80
2 A' 3148 3013 7.72 109.39 0.09 0.17
3 A' 3091 2958 13.64 180.21 0.03 0.06
4 A' 1519 1454 2.36 3.61 0.75 0.86
5 A' 1502 1438 1.70 6.56 0.73 0.84
6 A' 1421 1360 5.72 0.63 0.75 0.86
7 A' 1305 1249 41.50 3.87 0.43 0.61
8 A' 1105 1058 0.05 4.07 0.14 0.25
9 A' 1002 959 12.72 3.37 0.71 0.83
10 A' 624 597 9.75 16.54 0.19 0.32
11 A' 295 282 1.22 1.83 0.34 0.50
12 A" 3222 3083 5.26 18.70 0.75 0.86
13 A" 3194 3057 3.71 73.67 0.75 0.86
14 A" 1506 1442 10.13 5.68 0.75 0.86
15 A" 1286 1231 0.32 1.12 0.75 0.86
16 A" 1059 1013 0.12 1.47 0.75 0.86
17 A" 782 749 3.55 0.00 0.75 0.86
18 A" 266 255 0.02 0.02 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14753.9 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 14120.9 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=FULL/cc-pVQZ
ABC
1.02198 0.12978 0.12028

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.570 -2.002 0.000
C2 0.595 -1.051 0.000
Br3 0.000 0.782 0.000
H4 1.213 -1.160 0.881
H5 1.213 -1.160 -0.881
H6 -0.205 -3.026 0.000
H7 -1.187 -1.856 0.879
H8 -1.187 -1.856 -0.879

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.50432.84192.15932.15931.08661.08361.0836
C21.50431.92711.08131.08132.13082.14452.1445
Br32.84191.92712.45372.45373.81323.02373.0237
H42.15931.08132.45371.76182.50292.49903.0562
H52.15931.08132.45371.76182.50293.05622.4990
H61.08662.13083.81322.50292.50291.76181.7618
H71.08362.14453.02372.49903.05621.76181.7572
H81.08362.14453.02373.05622.49901.76181.7572

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 111.233 C1 C2 H4 112.219
C1 C2 H5 112.219 C2 C1 H6 109.600
C2 C1 H7 110.871 C2 C1 H8 110.871
Br3 C2 H4 105.841 Br3 C2 H5 105.841
H4 C2 H5 109.099 H6 C1 H7 108.544
H6 C1 H8 108.544 H7 C1 H8 108.343
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability