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

using model chemistry: CISD/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 CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-2651.536742
Energy at 298.15K 
HF Energy-2651.053170
Nuclear repulsion energy165.044934
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/6-311+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' 3205 2954 25.14      
2 A' 3190 2941 2.36      
3 A' 3128 2883 17.59      
4 A' 1561 1439 2.14      
5 A' 1553 1431 1.71      
6 A' 1477 1362 4.16      
7 A' 1346 1241 51.09      
8 A' 1126 1038 0.22      
9 A' 1021 941 12.19      
10 A' 616 568 14.90      
11 A' 301 278 1.45      
12 A" 3258 3003 6.93      
13 A" 3218 2967 8.05      
14 A" 1550 1428 9.22      
15 A" 1320 1217 0.17      
16 A" 1088 1003 0.11      
17 A" 801 738 2.95      
18 A" 271 250 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 15014.3 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 13840.1 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/6-311+G(3df,2p)
ABC
1.01971 0.12773 0.11848

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.571 -2.018 0.000
C2 0.597 -1.060 0.000
Br3 0.000 0.789 0.000
H4 1.213 -1.169 0.880
H5 1.213 -1.169 -0.880
H6 -0.199 -3.039 0.000
H7 -1.189 -1.879 0.879
H8 -1.189 -1.879 -0.879

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51042.86452.16302.16301.08641.08331.0833
C21.51041.94281.08001.08002.13252.15202.1520
Br32.86451.94282.46522.46523.83273.05003.0500
H42.16301.08002.46521.76062.50282.50453.0606
H52.16301.08002.46521.76062.50283.06062.5045
H61.08642.13253.83272.50282.50281.76031.7603
H71.08332.15203.05002.50453.06061.76031.7575
H81.08332.15203.05003.06062.50451.76031.7575

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 111.485 C1 C2 H4 112.165
C1 C2 H5 112.165 C2 C1 H6 109.319
C2 C1 H7 111.064 C2 C1 H8 111.064
Br3 C2 H4 105.717 Br3 C2 H5 105.717
H4 C2 H5 109.197 H6 C1 H7 108.445
H6 C1 H8 108.445 H7 C1 H8 108.429
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability