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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-2648.952548
Energy at 298.15K-2648.960819
HF Energy-2648.538577
Nuclear repulsion energy163.079126
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/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' 3150 3000 24.80      
2 A' 3135 2986 4.30      
3 A' 3071 2924 17.80      
4 A' 1548 1474 2.55      
5 A' 1540 1466 1.05      
6 A' 1466 1396 5.09      
7 A' 1322 1259 56.38      
8 A' 1114 1061 0.18      
9 A' 1007 959 10.76      
10 A' 578 550 14.54      
11 A' 296 282 1.99      
12 A" 3204 3051 11.18      
13 A" 3167 3016 8.05      
14 A" 1537 1463 7.95      
15 A" 1302 1240 0.41      
16 A" 1064 1013 0.15      
17 A" 790 752 3.58      
18 A" 270 257 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 14779.2 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 14074.2 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/6-31G*
ABC
0.99333 0.12500 0.11590

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.578 -2.039 0.000
C2 0.605 -1.085 0.000
Br3 0.000 0.799 0.000
H4 1.225 -1.191 0.892
H5 1.225 -1.191 -0.892
H6 -0.212 -3.075 0.000
H7 -1.200 -1.889 0.889
H8 -1.200 -1.889 -0.889

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51952.89652.18302.18301.09881.09531.0953
C21.51951.97861.09211.09212.15132.16652.1665
Br32.89651.97862.50222.50223.88013.07503.0750
H42.18301.09212.50221.78412.53162.52383.0888
H52.18301.09212.50221.78412.53163.08882.5238
H61.09882.15133.88012.53162.53161.78151.7815
H71.09532.16653.07502.52383.08881.78151.7773
H81.09532.16653.07503.08882.52381.78151.7773

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 111.112 C1 C2 H4 112.390
C1 C2 H5 112.390 C2 C1 H6 109.450
C2 C1 H7 110.858 C2 C1 H8 110.858
Br3 C2 H4 105.480 Br3 C2 H5 105.480
H4 C2 H5 109.545 H6 C1 H7 108.577
H6 C1 H8 108.577 H7 C1 H8 108.459
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability