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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP=FULL/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-2650.520568
Energy at 298.15K-2650.522969
HF Energy-2650.315522
Nuclear repulsion energy124.025118
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/aug-cc-pVTZ
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 3495 3353 93.89      
2 Σ 2141 2054 25.69      
3 Σ 609 584 1.12      
4 Π 657 631 41.76      
4 Π 657 631 41.76      
5 Π 318 305 7.66      
5 Π 318 305 7.66      

Unscaled Zero Point Vibrational Energy (zpe) 4097.4 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 3931.1 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/aug-cc-pVTZ
B
0.13366

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.311
C2 0.000 0.000 -1.107
Br3 0.000 0.000 0.682
H4 0.000 0.000 -3.369

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20352.99321.0581
C21.20351.78972.2617
Br32.99321.78974.0513
H41.05812.26174.0513

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