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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP/6-311G**

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/6-311G**
 hartrees
Energy at 0K-2650.348058
Energy at 298.15K-2650.350300
HF Energy-2650.215650
Nuclear repulsion energy123.473169
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/6-311G**
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 3497 3497 90.20      
2 Σ 2139 2139 19.37      
3 Σ 604 604 1.22      
4 Π 618 618 45.57      
4 Π 618 618 45.57      
5 Π 273 273 3.89      
5 Π 273 273 3.89      

Unscaled Zero Point Vibrational Energy (zpe) 4010.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4010.7 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/6-311G**
B
0.13249

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-311G**

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 -1.113
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.382

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20723.00591.0619
C21.20721.79872.2691
Br33.00591.79874.0678
H41.06192.26914.0678

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
Charges from optimized geometry at B2PLYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.079      
2 C -0.131      
3 Br 0.085      
4 H 0.126      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.230 0.230
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.814 0.000 0.000
y 0.000 -30.814 0.000
z 0.000 0.000 -22.251
Traceless
 xyz
x -4.281 0.000 0.000
y 0.000 -4.281 0.000
z 0.000 0.000 8.563
Polar
3z2-r217.126
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.599 0.000 0.000
y 0.000 2.599 0.000
z 0.000 0.000 8.783


<r2> (average value of r2) Å2
<r2> 85.092
(<r2>)1/2 9.225