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

using model chemistry: CISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-2648.904604
Energy at 298.15K 
HF Energy-2648.539021
Nuclear repulsion energy163.820675
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 CISD/6-31G*
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' 3218 2980 27.30      
2 A' 3207 2969 1.85      
3 A' 3138 2906 17.90      
4 A' 1579 1462 2.47      
5 A' 1572 1455 1.24      
6 A' 1499 1387 5.14      
7 A' 1356 1255 60.97      
8 A' 1137 1052 0.36      
9 A' 1026 950 11.58      
10 A' 596 552 17.30      
11 A' 303 280 2.06      
12 A" 3277 3034 9.66      
13 A" 3235 2995 8.68      
14 A" 1568 1452 8.21      
15 A" 1331 1232 0.41      
16 A" 1090 1009 0.16      
17 A" 805 746 3.66      
18 A" 274 254 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 15105.9 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 13985.0 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 CISD/6-31G*
ABC
1.00315 0.12603 0.11687

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.576 -2.028 0.000
C2 0.603 -1.076 0.000
Br3 0.000 0.794 0.000
H4 1.221 -1.181 0.887
H5 1.221 -1.181 -0.887
H6 -0.211 -3.058 0.000
H7 -1.196 -1.880 0.884
H8 -1.196 -1.880 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51492.88052.17512.17511.09291.08951.0895
C21.51491.96501.08581.08582.14272.15902.1590
Br32.88051.96502.48532.48533.85843.06013.0601
H42.17511.08582.48531.77322.52192.51543.0759
H52.17511.08582.48531.77322.52193.07592.5154
H61.09292.14273.85842.52192.52191.77151.7715
H71.08952.15903.06012.51543.07591.77151.7674
H81.08952.15903.06013.07592.51541.77151.7674

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 111.077 C1 C2 H4 112.463
C1 C2 H5 112.463 C2 C1 H6 109.428
C2 C1 H7 110.935 C2 C1 H8 110.935
Br3 C2 H4 105.448 Br3 C2 H5 105.448
H4 C2 H5 109.482 H6 C1 H7 108.530
H6 C1 H8 108.530 H7 C1 H8 108.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability