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All results from a given calculation for CH3NC (methyl isocyanide)

using model chemistry: MP2/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-132.318136
Energy at 298.15K-132.320498
HF Energy-131.901783
Nuclear repulsion energy59.362132
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/cc-pVDZ
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 3109 2962 16.72      
2 A1 2149 2047 68.09      
3 A1 1454 1385 7.65      
4 A1 977 931 16.72      
5 E 3219 3066 3.61      
5 E 3219 3066 3.61      
6 E 1493 1422 10.01      
6 E 1493 1422 10.01      
7 E 1147 1093 0.05      
7 E 1147 1093 0.05      
8 E 264 252 0.08      
8 E 264 252 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 9968.5 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 9495.0 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/cc-pVDZ
ABC
5.19381 0.32866 0.32866

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.119
N2 0.000 0.000 0.308
C3 0.000 0.000 1.503
H4 0.000 1.036 -1.487
H5 0.897 -0.518 -1.487
H6 -0.897 -0.518 -1.487

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42742.62191.09951.09951.0995
N21.42741.19452.07282.07282.0728
C32.62191.19453.16423.16423.1642
H41.09952.07283.16421.79461.7946
H51.09952.07283.16421.79461.7946
H61.09952.07283.16421.79461.7946

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 109.548
N2 C1 H5 109.548 N2 C1 H6 109.548
H4 C1 H5 109.394 H4 C1 H6 109.394
H5 C1 H6 109.394
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability