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: TPSSh/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 TPSSh/cc-pVTZ
 hartrees
Energy at 0K-2650.870550
Energy at 298.15K-2650.872914
HF Energy-2650.870550
Nuclear repulsion energy124.101163
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 TPSSh/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 3471 3361 94.36      
2 Σ 2163 2095 29.40      
3 Σ 607 588 1.52      
4 Π 639 619 46.03      
4 Π 639 619 46.03      
5 Π 311 301 5.91      
5 Π 311 301 5.91      

Unscaled Zero Point Vibrational Energy (zpe) 4070.3 cm-1
Scaled (by 0.9683) Zero Point Vibrational Energy (zpe) 3941.3 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 TPSSh/cc-pVTZ
B
0.13384

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.309
C2 0.000 0.000 -1.107
Br3 0.000 0.000 0.682
H4 0.000 0.000 -3.372

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20232.99061.0627
C21.20231.78842.2650
Br32.99061.78844.0533
H41.06272.26504.0533

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 TPSSh/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.072      
2 C -0.106      
3 Br 0.050      
4 H 0.128      


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 -0.217 0.217
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.565 0.000 0.000
y 0.000 3.565 0.000
z 0.000 0.000 9.491


<r2> (average value of r2) Å2
<r2> 84.324
(<r2>)1/2 9.183