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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP=FULL/3-21G

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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-2637.528922
Energy at 298.15K-2637.531689
HF Energy-2637.449232
Nuclear repulsion energy121.440843
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 B2PLYP=FULL/3-21G
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 3356 76.68      
2 Σ 2198 2093 10.57      
3 Σ 590 561 0.16      
4 Π 872 830 30.85      
4 Π 872 830 30.85      
5 Π 426 406 17.99      
5 Π 426 406 17.99      

Unscaled Zero Point Vibrational Energy (zpe) 4453.9 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 4240.1 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 B2PLYP=FULL/3-21G
B
0.12834

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.353
C2 0.000 0.000 -1.145
Br3 0.000 0.000 0.697
H4 0.000 0.000 -3.412

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20723.04961.0594
C21.20721.84242.2666
Br33.04961.84244.1090
H41.05942.26664.1090

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