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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CCSD(T)/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(T)/6-31G(2df,p)
 hartrees
Energy at 0K-2646.796375
Energy at 298.15K-2646.798769
HF Energy-2646.307525
Nuclear repulsion energy124.389789
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(T)/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 3525 3525        
2 Σ 2163 2163        
3 Σ 629 629        
4 Π 623 623        
4 Π 623 623        
5 Π 330 330        
5 Π 330 330        

Unscaled Zero Point Vibrational Energy (zpe) 4110.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4110.7 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 CCSD(T)/6-31G(2df,p)
B
0.13432

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.308
C2 0.000 0.000 -1.097
Br3 0.000 0.000 0.680
H4 0.000 0.000 -3.371

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21092.98841.0630
C21.21091.77762.2739
Br32.98841.77764.0514
H41.06302.27394.0514

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