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

using model chemistry: MP2=FULL/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-2652.055525
Energy at 298.15K 
HF Energy-2651.052932
Nuclear repulsion energy165.539215
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/6-311+G(3df,2p)
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' 3175 2993 12.24 68.20 0.69 0.82
2 A' 3136 2956 8.17 107.39 0.08 0.15
3 A' 3087 2910 14.15 169.41 0.04 0.07
4 A' 1523 1435 2.53 3.12 0.75 0.86
5 A' 1508 1422 1.84 5.76 0.65 0.79
6 A' 1425 1344 5.56 0.56 0.74 0.85
7 A' 1302 1227 41.48 5.10 0.30 0.46
8 A' 1104 1041 0.06 4.61 0.13 0.22
9 A' 1000 943 12.94 3.15 0.65 0.79
10 A' 618 583 10.18 18.13 0.18 0.30
11 A' 296 279 1.24 2.10 0.28 0.44
12 A" 3211 3027 6.28 12.59 0.75 0.86
13 A" 3186 3004 2.85 77.27 0.75 0.86
14 A" 1511 1424 10.38 5.11 0.75 0.86
15 A" 1282 1209 0.26 1.00 0.75 0.86
16 A" 1060 999 0.14 1.15 0.75 0.86
17 A" 783 738 3.38 0.01 0.75 0.86
18 A" 275 259 0.01 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14739.9 cm-1
Scaled (by 0.9427) Zero Point Vibrational Energy (zpe) 13895.3 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/6-311+G(3df,2p)
ABC
1.01445 0.12901 0.11955

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.572 -2.007 0.000
C2 0.598 -1.056 0.000
Br3 0.000 0.785 0.000
H4 1.217 -1.166 0.884
H5 1.217 -1.166 -0.884
H6 -0.207 -3.033 0.000
H7 -1.191 -1.861 0.881
H8 -1.191 -1.861 -0.881

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.50772.84942.16532.16531.08931.08611.0861
C21.50771.93521.08461.08462.13462.15042.1504
Br32.84941.93522.46292.46293.82323.03243.0324
H42.16531.08462.46291.76802.50882.50583.0650
H52.16531.08462.46291.76802.50883.06502.5058
H61.08932.13463.82322.50882.50881.76531.7653
H71.08612.15043.03242.50583.06501.76531.7618
H81.08612.15043.03243.06502.50581.76531.7618

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 111.100 C1 C2 H4 112.259
C1 C2 H5 112.259 C2 C1 H6 109.505
C2 C1 H7 110.952 C2 C1 H8 110.952
Br3 C2 H4 105.823 Br3 C2 H5 105.823
H4 C2 H5 109.184 H6 C1 H7 108.481
H6 C1 H8 108.481 H7 C1 H8 108.398
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability