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: LSDA/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at LSDA/STO-3G
 hartrees
Energy at 0K-130.261072
Energy at 298.15K-130.263372
Nuclear repulsion energy58.433117
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 LSDA/STO-3G
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 3264 2923 0.16      
2 A1 2220 1988 103.45      
3 A1 1504 1347 0.17      
4 A1 985 882 2.65      
5 E 3427 3068 3.50      
5 E 3427 3068 3.50      
6 E 1587 1421 14.46      
6 E 1587 1421 14.46      
7 E 1152 1032 0.20      
7 E 1152 1032 0.20      
8 E 293 263 1.23      
8 E 293 263 1.23      

Unscaled Zero Point Vibrational Energy (zpe) 10446.0 cm-1
Scaled (by 0.8955) Zero Point Vibrational Energy (zpe) 9354.4 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 LSDA/STO-3G
ABC
5.12840 0.31754 0.31754

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.138
N2 0.000 0.000 0.313
C3 0.000 0.000 1.530
H4 0.000 1.043 -1.513
H5 0.903 -0.521 -1.513
H6 -0.903 -0.521 -1.513

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.45112.66871.10781.10781.1078
N21.45111.21762.10222.10222.1022
C32.66871.21763.21673.21673.2167
H41.10782.10223.21671.80601.8060
H51.10782.10223.21671.80601.8060
H61.10782.10223.21671.80601.8060

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 109.748
N2 C1 H5 109.748 N2 C1 H6 109.748
H4 C1 H5 109.193 H4 C1 H6 109.193
H5 C1 H6 109.193
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.193      
2 N -0.215      
3 C 0.003      
4 H 0.135      
5 H 0.135      
6 H 0.135      


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 -3.260 3.260
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.038 0.000 0.000
y 0.000 -16.038 0.000
z 0.000 0.000 -19.093
Traceless
 xyz
x 1.528 0.000 0.000
y 0.000 1.528 0.000
z 0.000 0.000 -3.055
Polar
3z2-r2-6.110
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 1.334 0.000 0.000
y 0.000 1.334 0.000
z 0.000 0.000 3.342


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000