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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: B3PW91/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at B3PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-185.637441
Energy at 298.15K-185.636690
HF Energy-185.637441
Nuclear repulsion energy77.054259
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 B3PW91/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 2439 2354 0.00      
2 Σg 887 856 0.00      
3 Σu 2272 2192 0.02      
4 Πg 556 536 0.00      
4 Πg 556 536 0.00      
5 Πu 252 243 21.56      
5 Πu 252 243 21.56      

Unscaled Zero Point Vibrational Energy (zpe) 3606.6 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 3480.8 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 B3PW91/aug-cc-pVTZ
B
0.15879

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVTZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.687
C2 0.000 0.000 -0.687
N3 0.000 0.000 1.840
N4 0.000 0.000 -1.840

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.37471.15272.5274
C21.37472.52741.1527
N31.15272.52743.6801
N42.52741.15273.6801

picture of Cyanogen state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 180.000 C2 C1 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.432      
2 C 0.432      
3 N -0.432      
4 N -0.432      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.852 0.000 0.000
y 0.000 -20.852 0.000
z 0.000 0.000 -29.976
Traceless
 xyz
x 4.562 0.000 0.000
y 0.000 4.562 0.000
z 0.000 0.000 -9.125
Polar
3z2-r2-18.250
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 3.236 0.000 0.000
y 0.000 3.236 0.000
z 0.000 0.000 8.269


<r2> (average value of r2) Å2
<r2> 67.993
(<r2>)1/2 8.246