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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-207.403550
Energy at 298.15K 
HF Energy-206.790998
Nuclear repulsion energy103.277801
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 MP2/6-31G**
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' 3253 3046 13.26 73.56 0.69 0.81
2 A' 3135 2936 45.57 134.15 0.01 0.02
3 A' 2402 2250 771.17 0.47 0.13 0.23
4 A' 1559 1460 4.24 13.73 0.75 0.85
5 A' 1511 1415 31.05 10.08 0.69 0.82
6 A' 1486 1391 26.06 33.13 0.29 0.45
7 A' 1188 1113 20.62 3.52 0.60 0.75
8 A' 900 842 26.87 15.69 0.22 0.35
9 A' 619 580 24.18 0.53 0.56 0.72
10 A' 184 173 18.35 1.82 0.69 0.82
11 A" 3226 3021 18.02 61.57 0.75 0.86
12 A" 1565 1465 4.37 20.22 0.75 0.86
13 A" 1163 1089 0.18 3.16 0.75 0.86
14 A" 564 528 21.20 0.51 0.75 0.86
15 A" 70 66 2.55 1.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11412.0 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 10687.3 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 MP2/6-31G**
ABC
2.57023 0.14372 0.13969

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.356 1.097 0.000
N2 0.000 0.603 0.000
C3 -0.555 -0.479 0.000
O4 -1.239 -1.454 0.000
H5 1.326 2.182 0.000
H6 1.890 0.761 0.887
H7 1.890 0.761 -0.887

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44282.47673.63891.08571.08881.0888
N21.44281.21642.40192.06202.09392.0939
C32.47671.21641.19133.25912.88142.8814
O43.63892.40191.19134.45033.93523.9352
H51.08572.06203.25914.45031.76771.7677
H61.08882.09392.88143.93521.76771.7743
H71.08882.09392.88143.93521.76771.7743

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.143 N2 C1 H5 108.453
N2 C1 H6 110.832 N2 C1 H7 110.832
N2 C3 O4 172.089 H5 C1 H6 108.769
H5 C1 H7 108.769 H6 C1 H7 109.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability