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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CCSD/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 CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-2646.773651
Energy at 298.15K-2646.776127
HF Energy-2646.308352
Nuclear repulsion energy124.617787
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 CCSD/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 3544 3351 88.64      
2 Σ 2214 2093 7.64      
3 Σ 635 600 0.58      
4 Π 667 630 40.76      
4 Π 667 630 40.76      
5 Π 345 326 4.62      
5 Π 345 326 4.62      

Unscaled Zero Point Vibrational Energy (zpe) 4208.0 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 3978.6 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 CCSD/6-31G(2df,p)
B
0.13488

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.302
C2 0.000 0.000 -1.098
Br3 0.000 0.000 0.679
H4 0.000 0.000 -3.364

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20422.98091.0616
C21.20421.77682.2658
Br32.98091.77684.0425
H41.06162.26584.0425

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