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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B3LYP/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at B3LYP/aug-cc-pVTZ
 hartrees
Energy at 0K-2650.983607
Energy at 298.15K-2650.986003
HF Energy-2650.983607
Nuclear repulsion energy123.843136
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 B3LYP/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3473 3360 99.27      
2 Σ 2174 2103 31.34      
3 Σ 600 581 1.34      
4 Π 660 639 42.91      
4 Π 660 639 42.91      
5 Π 317 306 8.06      
5 Π 317 306 8.06      

Unscaled Zero Point Vibrational Energy (zpe) 4100.2 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 3966.9 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 B3LYP/aug-cc-pVTZ
B
0.13335

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.311
C2 0.000 0.000 -1.113
Br3 0.000 0.000 0.683
H4 0.000 0.000 -3.372

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19882.99471.0611
C21.19881.79582.2600
Br32.99471.79584.0558
H41.06112.26004.0558

picture of bromoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 180.000 C2 C1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.024      
2 C 0.368      
3 Br 0.158      
4 H 0.498      


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 -0.194 0.194
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.885 0.000 0.000
y 0.000 -30.885 0.000
z 0.000 0.000 -22.856
Traceless
 xyz
x -4.015 0.000 0.000
y 0.000 -4.015 0.000
z 0.000 0.000 8.029
Polar
3z2-r216.059
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 4.930 0.000 0.000
y 0.000 4.930 0.000
z 0.000 0.000 10.022


<r2> (average value of r2) Å2
<r2> 84.815
(<r2>)1/2 9.210