return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: QCISD(T)=FULL/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(T)=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-2651.565153
Energy at 298.15K 
HF Energy-2651.046971
Nuclear repulsion energy162.901148
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(T)=FULL/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' 3108 3015        
2 A' 3091 2999        
3 A' 3024 2933        
4 A' 1480 1436        
5 A' 1465 1421        
6 A' 1394 1353        
7 A' 1272 1234        
8 A' 1082 1049        
9 A' 974 945        
10 A' 573 556        
11 A' 287 279        
12 A" 3162 3067        
13 A" 3125 3032        
14 A" 1469 1425        
15 A" 1254 1216        
16 A" 1030 999        
17 A" 762 739        
18 A" 258 250        

Unscaled Zero Point Vibrational Energy (zpe) 14404.4 cm-1
Scaled (by 0.9701) Zero Point Vibrational Energy (zpe) 13973.7 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 QCISD(T)=FULL/aug-cc-pVDZ
ABC
0.98237 0.12504 0.11587

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.581 -2.035 0.000
C2 0.609 -1.079 0.000
Br3 0.000 0.797 0.000
H4 1.232 -1.186 0.899
H5 1.232 -1.186 -0.899
H6 -0.215 -3.079 0.000
H7 -1.207 -1.883 0.895
H8 -1.207 -1.883 -0.895

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.52652.89172.19552.19551.10611.10271.1027
C21.52651.97291.09971.09972.16222.17812.1781
Br32.89171.97292.50202.50203.88203.07313.0731
H42.19551.09972.50201.79892.54672.53693.1076
H52.19551.09972.50201.79892.54673.10762.5369
H61.10612.16223.88202.54672.54671.79321.7932
H71.10272.17813.07312.53693.10761.79321.7906
H81.10272.17813.07313.10762.53691.79321.7906

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 110.805 C1 C2 H4 112.428
C1 C2 H5 112.428 C2 C1 H6 109.402
C2 C1 H7 110.848 C2 C1 H8 110.848
Br3 C2 H4 105.485 Br3 C2 H5 105.485
H4 C2 H5 109.760 H6 C1 H7 108.553
H6 C1 H8 108.553 H7 C1 H8 108.573
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability