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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-207.505384
Energy at 298.15K 
HF Energy-206.857828
Nuclear repulsion energy103.805801
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/TZVP
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' 3210 3042 11.57 72.39 0.65 0.79
2 A' 3096 2935 46.68 169.04 0.01 0.02
3 A' 2386 2262 930.29 0.89 0.19 0.32
4 A' 1531 1451 2.53 6.53 0.64 0.78
5 A' 1498 1420 28.95 8.00 0.74 0.85
6 A' 1474 1397 27.15 35.39 0.25 0.41
7 A' 1182 1121 21.37 3.38 0.61 0.76
8 A' 891 845 29.09 16.92 0.17 0.29
9 A' 637 603 25.97 0.61 0.56 0.72
10 A' 181 171 19.69 2.46 0.73 0.84
11 A" 3179 3014 17.64 63.47 0.75 0.86
12 A" 1525 1446 6.10 14.55 0.75 0.86
13 A" 1157 1096 0.49 2.13 0.75 0.86
14 A" 588 558 21.61 0.56 0.75 0.86
15 A" 76 72 2.40 1.85 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11304.9 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 10715.9 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/TZVP
ABC
2.52571 0.14566 0.14139

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.364 1.071 0.000
N2 0.000 0.602 0.000
C3 -0.566 -0.464 0.000
O4 -1.241 -1.433 0.000
H5 1.357 2.157 0.000
H6 1.891 0.724 0.888
H7 1.891 0.724 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44242.46643.61371.08591.08951.0895
N21.44241.20752.38392.06392.09292.0929
C32.46641.20751.18083.25132.87022.8702
O43.61372.38391.18084.43183.90543.9054
H51.08592.06393.25134.43181.76881.7688
H61.08952.09292.87023.90541.76881.7756
H71.08952.09292.87023.90541.76881.7756

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.924 N2 C1 H5 108.608
N2 C1 H6 110.726 N2 C1 H7 110.726
N2 C3 O4 173.062 H5 C1 H6 108.795
H5 C1 H7 108.795 H6 C1 H7 109.143
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability