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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CISD/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 CISD/6-311G*
 hartrees
Energy at 0K-2648.970196
Energy at 298.15K-2648.972486
HF Energy-2648.611786
Nuclear repulsion energy123.722948
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/6-311G*
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 3537 3273 76.27      
2 Σ 2236 2069 11.85      
3 Σ 623 576 0.61      
4 Π 624 577 49.91      
4 Π 624 577 49.91      
5 Π 288 266 3.39      
5 Π 288 266 3.39      

Unscaled Zero Point Vibrational Energy (zpe) 4109.3 cm-1
Scaled (by 0.9253) Zero Point Vibrational Energy (zpe) 3802.3 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 CISD/6-311G*
B
0.13310

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.314
C2 0.000 0.000 -1.114
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.376

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19972.99751.0621
C21.19971.79772.2618
Br32.99751.79774.0595
H41.06212.26184.0595

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