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 AlNC (Aluminum isocyanide)

using model chemistry: mPW1PW91/6-31G(2df,p)

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 mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-335.225292
Energy at 298.15K 
HF Energy-335.225292
Nuclear repulsion energy58.505650
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 mPW1PW91/6-31G(2df,p)
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 2134 2037 428.25 77.53 0.12 0.21
2 Σ 572 546 162.05 17.50 0.73 0.84
3 Π 79 76 3.37 8.35 0.75 0.86
3 Π 79 76 3.37 8.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1432.1 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 1367.2 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 mPW1PW91/6-31G(2df,p)
B
0.19875

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 0.000 0.000 1.196
N2 0.000 0.000 -0.651
C3 0.000 0.000 -1.833

Atom - Atom Distances (Å)
  Al1 N2 C3
Al11.84713.0288
N21.84711.1818
C33.02881.1818

picture of Aluminum isocyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Al1 N2 C3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Al 0.255      
2 N -0.075      
3 C -0.181      


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 2.530 2.530
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.781 0.000 0.000
y 0.000 -21.781 0.000
z 0.000 0.000 -31.325
Traceless
 xyz
x 4.772 0.000 0.000
y 0.000 4.772 0.000
z 0.000 0.000 -9.544
Polar
3z2-r2-19.088
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 6.769 0.000 0.000
y 0.000 6.769 0.000
z 0.000 0.000 8.790


<r2> (average value of r2) Å2
<r2> 57.309
(<r2>)1/2 7.570