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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B3LYP/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-2650.879934
Energy at 298.15K-2650.882269
HF Energy-2650.879934
Nuclear repulsion energy123.118479
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/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 Σ 3484 3379 101.06      
2 Σ 2184 2119 24.56      
3 Σ 603 585 1.59      
4 Π 643 623 35.63      
4 Π 643 623 35.63      
5 Π 300 291 4.93      
5 Π 300 291 4.93      

Unscaled Zero Point Vibrational Energy (zpe) 4078.1 cm-1
Scaled (by 0.97) Zero Point Vibrational Energy (zpe) 3955.7 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 B3LYP/cc-pVDZ
B
0.13173

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.327
C2 0.000 0.000 -1.115
Br3 0.000 0.000 0.687
H4 0.000 0.000 -3.399

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21193.01451.0720
C21.21191.80262.2839
Br33.01451.80264.0864
H41.07202.28394.0864

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/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.091      
2 C 0.064      
3 Br 0.031      
4 H -0.004      


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 -0.133 0.133
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.391 0.000 0.000
y 0.000 -30.391 0.000
z 0.000 0.000 -22.072
Traceless
 xyz
x -4.160 0.000 0.000
y 0.000 -4.160 0.000
z 0.000 0.000 8.319
Polar
3z2-r216.638
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 2.508 0.000 0.000
y 0.000 2.508 0.000
z 0.000 0.000 8.808


<r2> (average value of r2) Å2
<r2> 85.294
(<r2>)1/2 9.235