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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP4=FULL/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 MP4=FULL/cc-pVDZ
 hartrees
Energy at 0K-2649.048777
Energy at 298.15K-2649.050998
HF Energy-2648.614794
Nuclear repulsion energy122.288044
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 MP4=FULL/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 3479 3358        
2 Σ 2077 2004        
3 Σ 603 582        
4 Π 585 565        
4 Π 585 565        
5 Π 281 271        
5 Π 281 271        

Unscaled Zero Point Vibrational Energy (zpe) 3944.9 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 3807.2 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 MP4=FULL/cc-pVDZ
B
0.12981

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.348
C2 0.000 0.000 -1.117
Br3 0.000 0.000 0.692
H4 0.000 0.000 -3.425

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.23203.04031.0769
C21.23201.80842.3089
Br33.04031.80844.1172
H41.07692.30894.1172

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