return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for BrCN (Cyanogen bromide)

using model chemistry: B2PLYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-2653.778884
Energy at 298.15K 
HF Energy-2653.660692
Nuclear repulsion energy123.990200
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/3-21G*
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 2188 2188 3.99 43.58 0.32 0.48
2 Σ 589 589 1.24 5.69 0.24 0.38
3 Π 408 408 0.71 2.00 0.75 0.86
3 Π 408 408 0.71 2.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1796.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1796.2 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 B2PLYP/3-21G*
B
0.13469

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.144
N2 0.000 0.000 -2.320
Br3 0.000 0.000 0.660

Atom - Atom Distances (Å)
  C1 N2 Br3
C11.17671.8039
N21.17672.9806
Br31.80392.9806

picture of Cyanogen bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N2 C1 Br3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.272      
2 N -0.402      
3 Br 0.131      


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 2.880 2.880
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.489 0.000 0.000
y 0.000 -28.489 0.000
z 0.000 0.000 -33.783
Traceless
 xyz
x 2.647 0.000 0.000
y 0.000 2.647 0.000
z 0.000 0.000 -5.294
Polar
3z2-r2-10.588
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 2.200 0.000 0.000
y 0.000 2.200 0.000
z 0.000 0.000 6.436


<r2> (average value of r2) Å2
<r2> 79.680
(<r2>)1/2 8.926