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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: BLYP/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 BLYP/cc-pVTZ
 hartrees
Energy at 0K-2650.955925
Energy at 298.15K-2650.958171
HF Energy-2650.955925
Nuclear repulsion energy122.872248
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/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 3403 3393 90.91      
2 Σ 2103 2097 30.97      
3 Σ 577 576 1.60      
4 Π 594 592 45.20      
4 Π 594 592 45.20      
5 Π 291 290 5.05      
5 Π 291 290 5.05      

Unscaled Zero Point Vibrational Energy (zpe) 3926.5 cm-1
Scaled (by 0.997) Zero Point Vibrational Energy (zpe) 3914.7 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/cc-pVTZ
B
0.13125

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.330
C2 0.000 0.000 -1.121
Br3 0.000 0.000 0.689
H4 0.000 0.000 -3.397

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20913.01901.0662
C21.20911.80992.2754
Br33.01901.80994.0852
H41.06622.27544.0852

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 BLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.107      
2 C -0.123      
3 Br 0.089      
4 H 0.141      


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 -0.086 0.086
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.840 0.000 0.000
y 0.000 -30.840 0.000
z 0.000 0.000 -22.875
Traceless
 xyz
x -3.983 0.000 0.000
y 0.000 -3.983 0.000
z 0.000 0.000 7.965
Polar
3z2-r215.930
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 3.600 0.000 0.000
y 0.000 3.600 0.000
z 0.000 0.000 9.737


<r2> (average value of r2) Å2
<r2> 85.865
(<r2>)1/2 9.266