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

using model chemistry: QCISD/aug-cc-pVDZ

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-pVDZ
 hartrees
Energy at 0K-2651.534490
Energy at 298.15K 
HF Energy-2651.047075
Nuclear repulsion energy162.998386
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-pVDZ
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' 3121 3023 27.17      
2 A' 3106 3009 5.16      
3 A' 3041 2946 20.57      
4 A' 1489 1442 1.24      
5 A' 1478 1432 0.77      
6 A' 1408 1364 3.32      
7 A' 1287 1247 51.13      
8 A' 1092 1057 0.03      
9 A' 985 955 10.81      
10 A' 581 563 13.82      
11 A' 291 282 1.47      
12 A" 3175 3076 9.41      
13 A" 3137 3039 9.30      
14 A" 1478 1431 7.74      
15 A" 1265 1225 0.19      
16 A" 1043 1010 0.19      
17 A" 770 746 2.27      
18 A" 259 251 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14503.2 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 14049.3 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-pVDZ
ABC
0.98734 0.12501 0.11590

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.580 -2.037 0.000
C2 0.606 -1.077 0.000
Br3 0.000 0.797 0.000
H4 1.230 -1.184 0.898
H5 1.230 -1.184 -0.898
H6 -0.208 -3.077 0.000
H7 -1.206 -1.888 0.895
H8 -1.206 -1.888 -0.895

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52562.89282.19302.19301.10531.10201.1020
C21.52561.97001.09891.09892.15962.17752.1775
Br32.89281.97002.49942.49943.88043.07673.0767
H42.19301.09892.49941.79622.54122.53573.1054
H52.19301.09892.49941.79622.54123.10542.5357
H61.10532.15963.88042.54122.54121.79211.7921
H71.10202.17753.07672.53573.10541.79211.7892
H81.10202.17753.07673.10542.53571.79211.7892

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 111.059 C1 C2 H4 112.339
C1 C2 H5 112.339 C2 C1 H6 109.301
C2 C1 H7 110.904 C2 C1 H8 110.904
Br3 C2 H4 105.521 Br3 C2 H5 105.521
H4 C2 H5 109.631 H6 C1 H7 108.562
H6 C1 H8 108.562 H7 C1 H8 108.544
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability