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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP2/aug-cc-pVDZ

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 MP2/aug-cc-pVDZ
 hartrees
Energy at 0K-2649.025394
Energy at 298.15K-2649.027516
HF Energy-2648.619914
Nuclear repulsion energy122.592889
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 MP2/aug-cc-pVDZ
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 3489 3346 88.21      
2 Σ 2070 1985 22.07      
3 Σ 612 587 1.30      
4 Π 537 515 47.68      
4 Π 537 515 47.68      
5 Π 262 252 2.04      
5 Π 262 252 2.04      

Unscaled Zero Point Vibrational Energy (zpe) 3884.3 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 3725.0 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 MP2/aug-cc-pVDZ
B
0.13041

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.344
C2 0.000 0.000 -1.112
Br3 0.000 0.000 0.690
H4 0.000 0.000 -3.418

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.23273.03451.0739
C21.23271.80182.3066
Br33.03451.80184.1084
H41.07392.30664.1084

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