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 HCCBr (bromoacetylene)

using model chemistry: PBE1PBE/6-311G*

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 PBE1PBE/6-311G*
 hartrees
Energy at 0K-2650.457492
Energy at 298.15K-2650.459777
HF Energy-2650.457492
Nuclear repulsion energy124.213901
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 PBE1PBE/6-311G*
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 3488 3343 82.86      
2 Σ 2198 2107 25.10      
3 Σ 619 594 1.70      
4 Π 609 584 50.03      
4 Π 609 584 50.03      
5 Π 294 281 4.52      
5 Π 294 281 4.52      

Unscaled Zero Point Vibrational Energy (zpe) 4055.2 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 3886.9 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 PBE1PBE/6-311G*
B
0.13409

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.307
C2 0.000 0.000 -1.105
Br3 0.000 0.000 0.681
H4 0.000 0.000 -3.372

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20142.98771.0651
C21.20141.78632.2666
Br32.98771.78634.0529
H41.06512.26664.0529

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 PBE1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.217      
2 C -0.129      
3 Br 0.090      
4 H 0.255      


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 -0.243 0.243
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.681 0.000 0.000
y 0.000 -30.681 0.000
z 0.000 0.000 -21.660
Traceless
 xyz
x -4.510 0.000 0.000
y 0.000 -4.510 0.000
z 0.000 0.000 9.021
Polar
3z2-r218.042
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 2.618 0.000 0.000
y 0.000 2.618 0.000
z 0.000 0.000 8.873


<r2> (average value of r2) Å2
<r2> 84.141
(<r2>)1/2 9.173