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: MP2/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/aug-cc-pVDZ
 hartrees
Energy at 0K-7795.370907
Energy at 298.15K-7795.382733
HF Energy-7794.635312
Nuclear repulsion energy976.567352
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 MP2/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 A1 3070 2944 2.35      
2 A1 1388 1331 7.08      
3 A1 1090 1046 4.26      
4 A1 424 407 3.34      
5 A1 223 214 0.02      
6 A2 319 306 0.00      
7 E 3180 3050 2.01      
7 E 3180 3050 2.01      
8 E 1464 1404 3.54      
8 E 1464 1404 3.54      
9 E 1078 1034 40.94      
9 E 1078 1034 40.94      
10 E 660 633 62.14      
10 E 660 633 62.14      
11 E 286 274 1.21      
11 E 286 274 1.21      
12 E 155 149 0.01      
12 E 155 149 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 10079.1 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 9665.8 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 MP2/aug-cc-pVDZ
ABC
0.03536 0.03536 0.02101

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.457
C2 0.000 0.000 1.979
Br3 0.000 1.837 -0.206
Br4 1.591 -0.919 -0.206
Br5 -1.591 -0.919 -0.206
H6 0.000 -1.038 2.342
H7 0.899 0.519 2.342
H8 -0.899 0.519 2.342

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.52151.95321.95321.95322.15182.15182.1518
C21.52152.85472.85472.85471.10001.10001.1000
Br31.95322.85473.18193.18193.84203.00643.0064
Br41.95322.85473.18193.18193.00643.00643.8420
Br51.95322.85473.18193.18193.00643.84203.0064
H62.15181.10003.84203.00643.00641.79851.7985
H72.15181.10003.00643.00643.84201.79851.7985
H82.15181.10003.00643.84203.00641.79851.7985

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 109.277 C1 C2 H7 109.277
C1 C2 H8 109.277 C2 C1 Br3 109.858
C2 C1 Br4 109.858 C2 C1 Br5 109.858
Br3 C1 Br4 109.082 Br3 C1 Br5 109.082
Br4 C1 Br5 109.082 H6 C2 H7 109.665
H6 C2 H8 109.665 H7 C2 H8 109.665
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability