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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP3=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 MP3=FULL/3-21G
 hartrees
Energy at 0K-2636.099180
Energy at 298.15K-2636.101943
HF Energy-2635.865952
Nuclear repulsion energy120.874703
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 MP3=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 3513 3513 61.67      
2 Σ 2251 2251 6.14      
3 Σ 585 585 0.00      
4 Π 864 864 29.56      
4 Π 864 864 29.56      
5 Π 428 428 18.42      
5 Π 428 428 18.42      

Unscaled Zero Point Vibrational Energy (zpe) 4466.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4466.1 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 MP3=FULL/3-21G
B
0.12722

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.360
C2 0.000 0.000 -1.155
Br3 0.000 0.000 0.700
H4 0.000 0.000 -3.423

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20503.06091.0625
C21.20501.85592.2675
Br33.06091.85594.1234
H41.06252.26754.1234

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