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

using model chemistry: QCISD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-2651.776668
Energy at 298.15K 
HF Energy-2651.143457
Nuclear repulsion energy164.743325
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 QCISD/aug-cc-pVTZ
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' 3129 3011 26.20      
2 A' 3115 2998 1.29      
3 A' 3052 2937 18.12      
4 A' 1522 1465 1.81      
5 A' 1513 1456 1.15      
6 A' 1437 1383 3.78      
7 A' 1306 1257 47.20      
8 A' 1102 1060 0.07      
9 A' 999 961 10.66      
10 A' 600 578 12.50      
11 A' 291 280 1.29      
12 A" 3181 3062 6.97      
13 A" 3140 3022 8.04      
14 A" 1511 1454 8.61      
15 A" 1287 1238 0.15      
16 A" 1057 1017 0.12      
17 A" 784 755 2.68      
18 A" 261 251 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14643.6 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 14093.0 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 QCISD/aug-cc-pVTZ
ABC
1.00681 0.12767 0.11832

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.575 -2.017 0.000
C2 0.601 -1.063 0.000
Br3 0.000 0.789 0.000
H4 1.219 -1.169 0.886
H5 1.219 -1.169 -0.886
H6 -0.208 -3.047 0.000
H7 -1.195 -1.870 0.884
H8 -1.195 -1.870 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51452.86442.17332.17331.09271.08961.0896
C21.51451.94661.08591.08592.14272.15842.1584
Br32.86441.94662.47112.47113.84123.04633.0463
H42.17331.08592.47111.77242.51952.51403.0745
H52.17331.08592.47111.77242.51953.07452.5140
H61.09272.14273.84122.51952.51951.77161.7716
H71.08962.15843.04632.51403.07451.77161.7675
H81.08962.15843.04633.07452.51401.77161.7675

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 111.094 C1 C2 H4 112.344
C1 C2 H5 112.344 C2 C1 H6 109.479
C2 C1 H7 110.904 C2 C1 H8 110.904
Br3 C2 H4 105.620 Br3 C2 H5 105.620
H4 C2 H5 109.395 H6 C1 H7 108.542
H6 C1 H8 108.542 H7 C1 H8 108.401
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability