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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-207.523700
Energy at 298.15K 
HF Energy-206.812425
Nuclear repulsion energy103.802258
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(2df,p)
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' 3220 3041 7.72 67.28 0.70 0.82
2 A' 3110 2937 37.15 129.70 0.01 0.02
3 A' 2418 2284 810.02 0.40 0.07 0.13
4 A' 1533 1448 4.61 8.56 0.59 0.74
5 A' 1498 1415 10.14 16.41 0.43 0.60
6 A' 1481 1398 37.93 24.64 0.33 0.50
7 A' 1174 1109 18.06 1.88 0.63 0.77
8 A' 895 845 24.64 14.44 0.19 0.32
9 A' 644 608 24.07 0.38 0.74 0.85
10 A' 174 164 18.38 1.66 0.64 0.78
11 A" 3198 3020 10.49 57.86 0.75 0.86
12 A" 1537 1451 5.58 16.05 0.75 0.86
13 A" 1153 1089 0.01 1.88 0.75 0.86
14 A" 598 565 18.55 0.53 0.75 0.86
15 A" 59 56 2.04 0.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11345.0 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 10715.3 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(2df,p)
ABC
2.63434 0.14478 0.14089

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.342 1.106 0.000
N2 0.000 0.591 0.000
C3 -0.555 -0.482 0.000
O4 -1.224 -1.453 0.000
H5 1.299 2.193 0.000
H6 1.885 0.779 0.888
H7 1.885 0.779 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43762.47353.62411.08821.09091.0909
N21.43761.20762.38252.06232.09232.0923
C32.47351.20761.17973.25412.88652.8865
O43.62412.38251.17974.43383.92943.9294
H51.08822.06233.25414.43381.76951.7695
H61.09092.09232.88653.92941.76951.7764
H71.09092.09232.88653.92941.76951.7764

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 138.327 N2 C1 H5 108.686
N2 C1 H6 110.945 N2 C1 H7 110.945
N2 C3 O4 172.756 H5 C1 H6 108.592
H5 C1 H7 108.592 H6 C1 H7 109.017
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability