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 CH3NC (methyl isocyanide)

using model chemistry: BLYP/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at BLYP/6-31G**
 hartrees
Energy at 0K-132.669099
Energy at 298.15K-132.671440
Nuclear repulsion energy59.367891
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 BLYP/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2976 2953 20.16      
2 A1 2151 2134 96.90      
3 A1 1426 1415 6.36      
4 A1 925 918 10.35      
5 E 3047 3023 10.64      
5 E 3047 3023 10.64      
6 E 1463 1452 7.76      
6 E 1463 1452 7.76      
7 E 1118 1109 0.00      
7 E 1118 1109 0.00      
8 E 268 265 0.56      
8 E 268 265 0.56      

Unscaled Zero Point Vibrational Energy (zpe) 9632.9 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 9558.8 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 BLYP/6-31G**
ABC
5.21535 0.32839 0.32839

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.118
N2 0.000 0.000 0.312
C3 0.000 0.000 1.502
H4 0.000 1.034 -1.496
H5 0.895 -0.517 -1.496
H6 -0.895 -0.517 -1.496

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.43002.61991.10101.10101.1010
N21.43001.18992.08302.08302.0830
C32.61991.18993.17153.17153.1715
H41.10102.08303.17151.79091.7909
H51.10102.08303.17151.79091.7909
H61.10102.08303.17151.79091.7909

picture of methyl isocyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 180.000 N2 C1 H4 110.095
N2 C1 H5 110.095 N2 C1 H6 110.095
H4 C1 H5 108.841 H4 C1 H6 108.841
H5 C1 H6 108.841
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.178      
2 N -0.174      
3 C -0.080      
4 H 0.144      
5 H 0.144      
6 H 0.144      


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 -3.645 3.645
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.451 0.000 0.000
y 0.000 -17.451 0.000
z 0.000 0.000 -20.947
Traceless
 xyz
x 1.748 0.000 0.000
y 0.000 1.748 0.000
z 0.000 0.000 -3.497
Polar
3z2-r2-6.993
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 2.849 0.000 0.000
y 0.000 2.849 0.000
z 0.000 0.000 5.548


<r2> (average value of r2) Å2
<r2> 43.267
(<r2>)1/2 6.578