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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-207.677925
Energy at 298.15K-207.672205
HF Energy-206.791866
Nuclear repulsion energy105.137518
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 CBS-Q
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' 3314 3314 24.78 81.93 0.66 0.80
2 A' 3211 3211 45.38 131.26 0.01 0.02
3 A' 2512 2512 1629.44 1.74 0.03 0.06
4 A' 1649 1649 1.38 5.51 0.35 0.52
5 A' 1619 1619 9.55 18.64 0.61 0.76
6 A' 1591 1591 60.03 14.52 0.41 0.59
7 A' 1258 1258 28.35 3.34 0.63 0.77
8 A' 943 943 53.24 10.14 0.21 0.34
9 A' 724 724 56.94 0.29 0.73 0.84
10 A' 152 152 22.82 1.00 0.73 0.84
11 A" 3283 3283 32.16 69.28 0.75 0.86
12 A" 1645 1645 4.32 18.94 0.75 0.86
13 A" 1234 1234 1.08 2.83 0.75 0.86
14 A" 686 686 56.68 0.82 0.75 0.86
15 A" 29 29 3.06 0.92 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11924.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11924.1 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 CBS-Q
ABC
2.37258 0.14583 0.14108

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.356 1.067 0.000
N2 0.000 0.576 0.000
C3 -0.575 -0.460 0.000
O4 -1.224 -1.411 0.000
H5 1.331 2.149 0.000
H6 1.887 0.730 0.885
H7 1.887 0.730 -0.885

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44172.46133.57681.08231.08571.0857
N21.44171.18522.33392.06042.08992.0899
C32.46131.18521.15133.23102.87402.8740
O43.57682.33391.15134.38193.87883.8788
H51.08232.06043.23104.38191.76201.7620
H61.08572.08992.87403.87881.76201.7697
H71.08572.08992.87403.87881.76201.7697

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 138.894 N2 C1 H5 108.598
N2 C1 H6 110.779 N2 C1 H7 110.779
N2 C3 O4 174.678 H5 C1 H6 108.730
H5 C1 H7 108.730 H6 C1 H7 109.172
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability