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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-207.124090
Energy at 298.15K 
HF Energy-206.704944
Nuclear repulsion energy100.808739
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/LANL2DZ
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' 3174 3057 17.99 69.53 0.67 0.80
2 A' 3042 2929 59.07 172.14 0.01 0.01
3 A' 2296 2212 839.14 2.62 0.38 0.55
4 A' 1538 1481 9.14 16.45 0.75 0.86
5 A' 1502 1446 27.02 11.85 0.71 0.83
6 A' 1397 1345 10.08 30.89 0.28 0.43
7 A' 1170 1127 19.33 5.81 0.64 0.78
8 A' 803 773 31.77 24.43 0.21 0.34
9 A' 551 531 24.71 1.44 0.12 0.21
10 A' 185 178 20.91 2.96 0.73 0.84
11 A" 3144 3028 28.21 59.15 0.75 0.86
12 A" 1544 1487 10.00 21.48 0.75 0.86
13 A" 1160 1117 0.12 3.44 0.75 0.86
14 A" 514 495 18.45 0.42 0.75 0.86
15 A" 69 66 5.12 3.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11043.9 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 10636.4 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/LANL2DZ
ABC
3.04403 0.13293 0.13058

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.265 1.308 0.000
N2 0.000 0.557 0.000
C3 -0.505 -0.566 0.000
O4 -1.161 -1.607 0.000
H5 1.023 2.379 0.000
H6 1.854 1.066 0.899
H7 1.854 1.066 -0.899

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.47112.57793.79241.09841.10221.1022
N21.47111.23142.45552.09052.12292.1229
C32.57791.23141.23023.31883.00663.0066
O43.79242.45551.23024.54584.12884.1288
H51.09842.09053.31884.54581.79571.7957
H61.10222.12293.00664.12881.79571.7988
H71.10222.12293.00664.12881.79571.7988

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 144.924 N2 C1 H5 108.012
N2 C1 H6 110.343 N2 C1 H7 110.343
N2 C3 O4 171.971 H5 C1 H6 109.371
H5 C1 H7 109.371 H6 C1 H7 109.374
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability