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 CH3CBr3 (1,1,1-tribromoethane)

using model chemistry: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-7758.363599
Energy at 298.15K-7758.375528
HF Energy-7757.847699
Nuclear repulsion energy979.304058
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 CID/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3157 2938 2.07      
2 A1 1536 1429 11.61      
3 A1 1067 993 2.29      
4 A1 435 405 4.88      
5 A1 226 211 0.14      
6 A2 327 305 0.00      
7 E 3240 3014 2.00      
7 E 3240 3014 2.00      
8 E 1602 1491 5.10      
8 E 1602 1491 5.10      
9 E 1200 1117 45.30      
9 E 1200 1117 45.30      
10 E 719 669 58.36      
10 E 719 669 58.35      
11 E 288 268 0.77      
11 E 288 268 0.77      
12 E 157 146 0.10      
12 E 157 146 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 10581.7 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 9846.3 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 CID/3-21G*
ABC
0.03555 0.03555 0.02116

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.456
C2 0.000 0.000 1.987
Br3 0.000 1.831 -0.207
Br4 1.585 -0.915 -0.207
Br5 -1.585 -0.915 -0.207
H6 0.000 -1.027 2.345
H7 0.890 0.514 2.345
H8 -0.890 0.514 2.345

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.53051.94681.94681.94682.15052.15052.1505
C21.53052.85682.85682.85681.08831.08831.0883
Br31.94682.85683.17053.17053.83163.00643.0064
Br41.94682.85683.17053.17053.00643.00643.8316
Br51.94682.85683.17053.17053.00643.83163.0064
H62.15051.08833.83163.00643.00641.77971.7797
H72.15051.08833.00643.00643.83161.77971.7797
H82.15051.08833.00643.83163.00641.77971.7797

picture of 1,1,1-tribromoethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.242 C1 C2 H7 109.242
C1 C2 H8 109.242 C2 C1 Br3 109.906
C2 C1 Br4 109.906 C2 C1 Br5 109.906
Br3 C1 Br4 109.033 Br3 C1 Br5 109.033
Br4 C1 Br5 109.033 H6 C2 H7 109.699
H6 C2 H8 109.699 H7 C2 H8 109.699
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability