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

using model chemistry: MP2=FULL/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=FULL/3-21G*
 hartrees
Energy at 0K-131.443485
Energy at 298.15K-131.445882
HF Energy-131.155316
Nuclear repulsion energy58.890305
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/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3109 2947 9.74      
2 A1 2069 1961 48.76      
3 A1 1518 1439 2.96      
4 A1 888 842 28.66      
5 E 3191 3025 6.09      
5 E 3191 3025 6.09      
6 E 1594 1511 10.95      
6 E 1594 1511 10.95      
7 E 1195 1133 0.14      
7 E 1195 1133 0.14      
8 E 282 267 1.33      
8 E 282 267 1.33      

Unscaled Zero Point Vibrational Energy (zpe) 10053.2 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 9530.4 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 MP2=FULL/3-21G*
ABC
5.24573 0.32110 0.32110

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/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 -0.515 -1.499
H6 -0.893 -0.515 -1.499

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.45672.65561.09191.09191.0919
N21.45671.19892.08872.08872.0887
C32.65561.19893.18683.18683.1868
H41.09192.08873.18681.78571.7857
H51.09192.08873.18681.78571.7857
H61.09192.08873.18681.78571.7857

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 109.239
N2 C1 H5 109.239 N2 C1 H6 109.239
H4 C1 H5 109.703 H4 C1 H6 109.703
H5 C1 H6 109.703
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability