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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CCSD(T)=FULL/TZVP

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)=FULL/TZVP
 hartrees
Energy at 0K-2649.277088
Energy at 298.15K-2649.279233
HF Energy-2648.663784
Nuclear repulsion energy122.874591
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)=FULL/TZVP
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 3490 3336        
2 Σ 2134 2040        
3 Σ 583 557        
4 Π 576 550        
4 Π 576 550        
5 Π 260 248        
5 Π 260 248        

Unscaled Zero Point Vibrational Energy (zpe) 3938.2 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 3764.9 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 CCSD(T)=FULL/TZVP
B
0.13124

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/TZVP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.331
C2 0.000 0.000 -1.121
Br3 0.000 0.000 0.689
H4 0.000 0.000 -3.394

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21013.01971.0630
C21.21011.80962.2730
Br33.01971.80964.0826
H41.06302.27304.0826

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