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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-131.438411
Energy at 298.15K-131.440805
HF Energy-131.155277
Nuclear repulsion energy58.880016
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 MP2/3-21G*
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 3108 2957 9.77      
2 A1 2068 1967 48.77      
3 A1 1518 1444 3.01      
4 A1 887 844 28.79      
5 E 3191 3035 6.14      
5 E 3191 3035 6.14      
6 E 1594 1516 10.90      
6 E 1594 1516 10.90      
7 E 1195 1136 0.14      
7 E 1195 1136 0.14      
8 E 281 267 1.33      
8 E 281 267 1.33      

Unscaled Zero Point Vibrational Energy (zpe) 10050.3 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 9560.9 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 MP2/3-21G*
ABC
5.24394 0.32098 0.32098

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.139
N2 0.000 0.000 0.318
C3 0.000 0.000 1.517
H4 0.000 1.031 -1.499
H5 0.893 -0.516 -1.499
H6 -0.893 -0.516 -1.499

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.45712.65621.09211.09211.0921
N21.45711.19912.08902.08902.0890
C32.65621.19913.18733.18733.1873
H41.09212.08903.18731.78601.7860
H51.09212.08903.18731.78601.7860
H61.09212.08903.18731.78601.7860

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 109.229
N2 C1 H5 109.229 N2 C1 H6 109.229
H4 C1 H5 109.712 H4 C1 H6 109.712
H5 C1 H6 109.712
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability