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: MP2=FULL/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 MP2=FULL/STO-3G
 hartrees
Energy at 0K-130.420952
Energy at 298.15K-130.423307
HF Energy-130.225785
Nuclear repulsion energy57.966801
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 MP2=FULL/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 3366 2992 0.86      
2 A1 2173 1932 55.99      
3 A1 1590 1414 10.21      
4 A1 992 881 13.98      
5 E 3546 3152 0.52      
5 E 3546 3152 0.52      
6 E 1675 1489 5.70      
6 E 1675 1489 5.70      
7 E 1227 1091 1.12      
7 E 1227 1091 1.12      
8 E 304 270 0.11      
8 E 304 270 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 10812.1 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 9610.9 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 MP2=FULL/STO-3G
ABC
5.10047 0.31115 0.31115

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.155
N2 0.000 0.000 0.321
C3 0.000 0.000 1.542
H4 0.000 1.046 -1.523
H5 0.905 -0.523 -1.523
H6 -0.905 -0.523 -1.523

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.47682.69771.10841.10841.1084
N21.47681.22092.12042.12042.1204
C32.69771.22093.23913.23913.2391
H41.10842.12043.23911.81091.8109
H51.10842.12043.23911.81091.8109
H61.10842.12043.23911.81091.8109

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 109.388
N2 C1 H5 109.388 N2 C1 H6 109.388
H4 C1 H5 109.554 H4 C1 H6 109.554
H5 C1 H6 109.554
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability