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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at G3
 hartrees
Energy at 0K-207.854149
Energy at 298.15K-207.848366
HF Energy-206.791283
Nuclear repulsion energy104.986755
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 HF/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3327 3135 25.29 83.69 0.66 0.79
2 A' 3230 3043 45.36 136.88 0.01 0.02
3 A' 2537 2391 1608.31 2.89 0.10 0.19
4 A' 1662 1566 0.63 5.60 0.27 0.42
5 A' 1633 1538 9.56 20.98 0.62 0.77
6 A' 1605 1512 59.48 18.39 0.43 0.60
7 A' 1267 1194 27.60 3.29 0.65 0.79
8 A' 932 878 52.05 9.29 0.22 0.36
9 A' 712 671 60.78 0.28 0.59 0.74
10 A' 137 130 23.60 0.95 0.74 0.85
11 A" 3298 3107 31.64 70.95 0.75 0.86
12 A" 1654 1559 4.20 20.23 0.75 0.86
13 A" 1242 1170 1.38 2.86 0.75 0.86
14 A" 680 641 57.64 0.98 0.75 0.86
15 A" 29 27 3.81 1.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11972.6 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 11280.6 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/6-31G*
ABC
2.60937 0.14341 0.13954

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.347 1.111 0.000
N2 0.000 0.597 0.000
C3 -0.552 -0.484 0.000
O4 -1.230 -1.463 0.000
H5 1.299 2.200 0.000
H6 1.888 0.782 0.891
H7 1.888 0.782 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44202.48063.64291.08941.09251.0925
N21.44201.21402.39922.06352.09532.0953
C32.48061.21401.19063.26082.88952.8895
O43.64292.39921.19064.45143.94413.9441
H51.08942.06353.26084.45141.77431.7743
H61.09252.09532.88953.94411.77431.7811
H71.09252.09532.88953.94411.77431.7811

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 142.938 N2 C1 H5 108.770
N2 C1 H6 110.608 N2 C1 H7 110.608
N2 C3 O4 174.893 H5 C1 H6 108.797
H5 C1 H7 108.797 H6 C1 H7 109.218
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability