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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CISD/6-31G*

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 CISD/6-31G*
 hartrees
Energy at 0K-2646.454331
Energy at 298.15K-2646.456925
HF Energy-2646.116060
Nuclear repulsion energy123.827307
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 CISD/6-31G*
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 3568 3304 78.19      
2 Σ 2272 2104 9.73      
3 Σ 616 570 0.85      
4 Π 733 678 43.27      
4 Π 733 678 43.27      
5 Π 384 355 7.41      
5 Π 384 355 7.41      

Unscaled Zero Point Vibrational Energy (zpe) 4344.6 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 4022.2 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 CISD/6-31G*
B
0.13330

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.312
C2 0.000 0.000 -1.111
Br3 0.000 0.000 0.683
H4 0.000 0.000 -3.376

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20112.99571.0636
C21.20111.79472.2646
Br32.99571.79474.0593
H41.06362.26464.0593

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