return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CID/6-311+G(3df,2p)

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 CID/6-311+G(3df,2p)
 hartrees
Energy at 0K-2649.054477
Energy at 298.15K-2649.056988
HF Energy-2648.630737
Nuclear repulsion energy124.389151
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 CID/6-311+G(3df,2p)
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 3553 3283 94.26      
2 Σ 2257 2086 17.61      
3 Σ 631 583 0.51      
4 Π 723 668 42.09      
4 Π 723 668 42.09      
5 Π 336 310 8.28      
5 Π 336 310 8.28      

Unscaled Zero Point Vibrational Energy (zpe) 4279.1 cm-1
Scaled (by 0.924) Zero Point Vibrational Energy (zpe) 3953.9 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 CID/6-311+G(3df,2p)
B
0.13456

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/6-311+G(3df,2p)

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 -1.109
Br3 0.000 0.000 0.680
H4 0.000 0.000 -3.358

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19172.98061.0579
C21.19171.78892.2496
Br32.98061.78894.0385
H41.05792.24964.0385

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