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

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-2652.377914
Energy at 298.15K 
HF Energy-2652.030117
Nuclear repulsion energy122.997794
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/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 2223 2136 0.36      
2 Σ 571 548 0.63      
3 Π 379 364 1.19      
3 Π 379 364 1.19      

Unscaled Zero Point Vibrational Energy (zpe) 1775.7 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 1706.6 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/3-21G*
B
0.13260

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.159
N2 0.000 0.000 -2.335
Br3 0.000 0.000 0.666

Atom - Atom Distances (Å)
  C1 N2 Br3
C11.17671.8244
N21.17673.0012
Br31.82443.0012

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