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All results from a given calculation for CH3CBr3 (1,1,1-tribromoethane)

using model chemistry: BLYP/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 BLYP/3-21G
 hartrees
Energy at 0K-7762.916759
Energy at 298.15K-7762.928336
HF Energy-7762.916759
Nuclear repulsion energy944.725844
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 BLYP/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 2998 2981 3.32      
2 A1 1431 1423 9.71      
3 A1 1001 996 17.53      
4 A1 386 384 7.46      
5 A1 203 202 0.02      
6 A2 305 303 0.00      
7 E 3071 3054 4.56      
7 E 3071 3054 4.56      
8 E 1504 1496 2.51      
8 E 1504 1496 2.51      
9 E 1100 1094 64.31      
9 E 1100 1094 64.31      
10 E 594 590 125.36      
10 E 593 590 125.39      
11 E 277 275 2.26      
11 E 277 275 2.26      
12 E 140 139 0.00      
12 E 140 139 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 9847.3 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 9793.2 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 BLYP/3-21G
ABC
0.03310 0.03310 0.01947

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.459
C2 0.000 0.000 1.989
Br3 0.000 1.909 -0.207
Br4 1.653 -0.954 -0.207
Br5 -1.653 -0.954 -0.207
H6 0.000 -1.037 2.358
H7 0.898 0.518 2.358
H8 -0.898 0.518 2.358

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 H6 H7 H8
C11.52952.02182.02182.02182.16312.16312.1631
C21.52952.90972.90972.90971.10031.10031.1003
Br32.02182.90973.30603.30603.90583.05283.0528
Br42.02182.90973.30603.30603.05283.05283.9058
Br52.02182.90973.30603.30603.05283.90583.0528
H62.16311.10033.90583.05283.05281.79541.7954
H72.16311.10033.05283.05283.90581.79541.7954
H82.16311.10033.05283.90583.05281.79541.7954

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 109.596 C1 C2 H7 109.596
C1 C2 H8 109.596 C2 C1 Br3 109.253
C2 C1 Br4 109.253 C2 C1 Br5 109.253
Br3 C1 Br4 109.689 Br3 C1 Br5 109.689
Br4 C1 Br5 109.689 H6 C2 H7 109.346
H6 C2 H8 109.346 H7 C2 H8 109.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.644      
2 C -0.466      
3 Br 0.147      
4 Br 0.147      
5 Br 0.147      
6 H 0.222      
7 H 0.222      
8 H 0.222      


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 1.685 1.685
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -66.676 0.000 0.000
y 0.000 -66.676 0.000
z 0.000 0.000 -63.972
Traceless
 xyz
x -1.352 0.000 0.000
y 0.000 -1.352 0.000
z 0.000 0.000 2.704
Polar
3z2-r25.408
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 10.223 0.000 0.000
y 0.000 10.223 0.000
z 0.000 0.000 6.251


<r2> (average value of r2) Å2
<r2> 473.046
(<r2>)1/2 21.750