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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-38.697502
Energy at 298.15K 
HF Energy-38.096391
Nuclear repulsion energy54.901362
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/CEP-121G*
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 3059 15.13 72.66 0.69 0.81
2 A' 3084 2938 53.28 155.76 0.01 0.01
3 A' 2312 2203 880.65 0.64 0.46 0.63
4 A' 1533 1460 4.39 10.61 0.75 0.86
5 A' 1493 1422 35.47 9.85 0.67 0.80
6 A' 1434 1367 22.47 28.84 0.23 0.38
7 A' 1167 1112 22.04 5.33 0.63 0.77
8 A' 878 836 29.31 21.51 0.18 0.31
9 A' 621 591 23.79 0.52 0.57 0.73
10 A' 181 173 20.17 1.83 0.70 0.82
11 A" 3181 3031 22.64 63.76 0.75 0.86
12 A" 1541 1468 6.10 15.71 0.75 0.86
13 A" 1141 1088 0.19 3.61 0.75 0.86
14 A" 558 531 16.78 0.55 0.75 0.86
15 A" 60 57 2.47 1.43 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11196.5 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 10668.0 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/CEP-121G*
ABC
2.34512 0.14380 0.13909

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.405 1.036 0.000
N2 0.000 0.630 0.000
C3 -0.574 -0.452 0.000
O4 -1.280 -1.420 0.000
H5 1.437 2.126 0.000
H6 1.911 0.661 0.894
H7 1.911 0.661 -0.894

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.46242.47633.63901.09011.09361.0936
N21.46241.22512.41682.07462.10992.1099
C32.47631.22511.19793.27002.86592.8659
O43.63902.41681.19794.46743.91313.9131
H51.09012.07463.27004.46741.78031.7803
H61.09362.10992.86593.91311.78031.7874
H71.09362.10992.86593.91311.78031.7874

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 134.076 N2 C1 H5 107.845
N2 C1 H6 110.439 N2 C1 H7 110.439
N2 C3 O4 171.814 H5 C1 H6 109.234
H5 C1 H7 109.234 H6 C1 H7 109.612
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability