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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CCD/6-31G(2df,p)

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 CCD/6-31G(2df,p)
 hartrees
Energy at 0K-2646.770271
Energy at 298.15K-2646.772768
HF Energy-2646.308549
Nuclear repulsion energy124.712704
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 CCD/6-31G(2df,p)
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 3551 3363 90.50      
2 Σ 2227 2110 7.91      
3 Σ 637 603 0.61      
4 Π 677 641 40.83      
4 Π 677 641 40.83      
5 Π 349 331 4.86      
5 Π 349 331 4.86      

Unscaled Zero Point Vibrational Energy (zpe) 4233.2 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 4009.7 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 CCD/6-31G(2df,p)
B
0.13510

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.300
C2 0.000 0.000 -1.097
Br3 0.000 0.000 0.678
H4 0.000 0.000 -3.361

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20232.97821.0614
C21.20231.77592.2637
Br32.97821.77594.0396
H41.06142.26374.0396

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