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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: QCISD(T)/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 QCISD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-2649.301462
Energy at 298.15K-2649.303790
HF Energy-2648.718556
Nuclear repulsion energy123.535861
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 QCISD(T)/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 3459 3344        
2 Σ 2118 2048        
3 Σ 604 584        
4 Π 628 607        
4 Π 628 607        
5 Π 301 291        
5 Π 301 291        

Unscaled Zero Point Vibrational Energy (zpe) 4019.9 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 3886.4 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 QCISD(T)/aug-cc-pVTZ
B
0.13257

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.321
C2 0.000 0.000 -1.110
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.385

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21153.00631.0633
C21.21151.79482.2748
Br33.00631.79484.0697
H41.06332.27484.0697

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