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: HSEh1PBE/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 HSEh1PBE/3-21G*
 hartrees
Energy at 0K-7762.611619
Energy at 298.15K-7762.623402
HF Energy-7762.611619
Nuclear repulsion energy982.125015
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 HSEh1PBE/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 3090 2966 1.22      
2 A1 1469 1410 21.43      
3 A1 1062 1019 6.50      
4 A1 423 406 4.94      
5 A1 218 209 0.11      
6 A2 317 305 0.00      
7 E 3180 3052 1.40      
7 E 3180 3052 1.40      
8 E 1537 1476 5.80      
8 E 1537 1476 5.80      
9 E 1144 1098 54.55      
9 E 1144 1098 54.55      
10 E 671 644 76.61      
10 E 671 644 76.59      
11 E 279 268 1.09      
11 E 279 268 1.09      
12 E 149 143 0.06      
12 E 149 143 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 10249.5 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 9838.5 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 HSEh1PBE/3-21G*
ABC
0.03576 0.03576 0.02127

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.454
C2 0.000 0.000 1.972
Br3 0.000 1.826 -0.205
Br4 1.581 -0.913 -0.205
Br5 -1.581 -0.913 -0.205
H6 0.000 -1.031 2.336
H7 0.893 0.516 2.336
H8 -0.893 0.516 2.336

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.51801.94151.94151.94152.14572.14572.1457
C21.51802.84212.84212.84211.09351.09351.0935
Br31.94152.84213.16273.16273.82402.99572.9957
Br41.94152.84213.16273.16272.99572.99573.8240
Br51.94152.84213.16273.16272.99573.82402.9957
H62.14571.09353.82402.99572.99571.78611.7861
H72.14571.09352.99572.99573.82401.78611.7861
H82.14571.09352.99573.82402.99571.78611.7861

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 109.425 C1 C2 H7 109.425
C1 C2 H8 109.425 C2 C1 Br3 109.869
C2 C1 Br4 109.869 C2 C1 Br5 109.869
Br3 C1 Br4 109.071 Br3 C1 Br5 109.071
Br4 C1 Br5 109.071 H6 C2 H7 109.517
H6 C2 H8 109.517 H7 C2 H8 109.517
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.285      
2 C -0.605      
3 Br 0.040      
4 Br 0.040      
5 Br 0.040      
6 H 0.257      
7 H 0.257      
8 H 0.257      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.532 1.532
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -65.728 0.000 0.000
y 0.000 -65.728 0.000
z 0.000 0.000 -63.490
Traceless
 xyz
x -1.119 0.000 0.000
y 0.000 -1.119 0.000
z 0.000 0.000 2.238
Polar
3z2-r24.476
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.517 0.000 0.000
y 0.000 10.517 -0.000
z 0.000 -0.000 7.831


<r2> (average value of r2) Å2
<r2> 439.251
(<r2>)1/2 20.958