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

using model chemistry: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-2638.834414
Energy at 298.15K 
HF Energy-2638.484464
Nuclear repulsion energy162.598237
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 CCD/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' 3115 2979 23.11      
2 A' 3100 2966 2.06      
3 A' 3044 2912 14.08      
4 A' 1581 1512 3.23      
5 A' 1562 1494 3.29      
6 A' 1486 1421 6.29      
7 A' 1340 1282 42.91      
8 A' 1099 1052 2.85      
9 A' 972 930 8.17      
10 A' 599 573 9.55      
11 A' 294 281 1.67      
12 A" 3165 3027 11.33      
13 A" 3128 2992 6.32      
14 A" 1571 1502 8.09      
15 A" 1322 1265 0.50      
16 A" 1083 1036 0.03      
17 A" 804 769 5.08      
18 A" 266 254 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 14764.9 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 14122.7 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 CCD/3-21G*
ABC
0.96848 0.12480 0.11542

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.589 -2.039 0.000
C2 0.619 -1.081 0.000
Br3 0.000 0.798 0.000
H4 1.235 -1.198 0.896
H5 1.235 -1.198 -0.896
H6 -0.234 -3.080 0.000
H7 -1.207 -1.873 0.891
H8 -1.207 -1.873 -0.891

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.54202.89732.19972.19971.10001.09661.0966
C21.54201.97801.09351.09352.17352.18042.1804
Br32.89731.97802.51212.51213.88493.06333.0633
H42.19971.09352.51211.79142.55022.53333.1001
H52.19971.09352.51211.79142.55023.10012.5333
H61.10002.17353.88492.55022.55021.78781.7878
H71.09662.18043.06332.53333.10011.78781.7825
H81.09662.18043.06333.10012.53331.78781.7825

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 110.174 C1 C2 H4 112.031
C1 C2 H5 112.031 C2 C1 H6 109.566
C2 C1 H7 110.306 C2 C1 H8 110.306
Br3 C2 H4 106.138 Br3 C2 H5 106.138
H4 C2 H5 109.998 H6 C1 H7 108.954
H6 C1 H8 108.954 H7 C1 H8 108.723
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability