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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/cc-pVQZ

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/cc-pVQZ
 hartrees
Energy at 0K-207.684712
Energy at 298.15K 
HF Energy-206.882186
Nuclear repulsion energy104.019679
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/cc-pVQZ
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' 3199 3034 8.01 64.24 0.68 0.81
2 A' 3090 2931 41.70 187.02 0.01 0.02
3 A' 2372 2249 946.34 1.04 0.06 0.11
4 A' 1523 1445 5.39 4.53 0.50 0.67
5 A' 1483 1406 12.16 14.37 0.35 0.52
6 A' 1464 1388 34.23 22.88 0.22 0.36
7 A' 1168 1108 20.04 0.92 0.62 0.77
8 A' 890 845 24.75 16.32 0.15 0.26
9 A' 637 605 25.28 0.36 0.75 0.86
10 A' 178 169 19.10 1.94 0.67 0.80
11 A" 3176 3012 11.42 59.81 0.75 0.86
12 A" 1529 1450 6.89 8.19 0.75 0.86
13 A" 1146 1087 0.09 0.50 0.75 0.86
14 A" 587 557 16.37 0.40 0.75 0.86
15 A" 56 53 1.82 0.92 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11248.7 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 10668.3 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/cc-pVQZ
ABC
2.59285 0.14577 0.14168

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.352 1.086 0.000
N2 0.000 0.595 0.000
C3 -0.559 -0.472 0.000
O4 -1.231 -1.440 0.000
H5 1.327 2.170 0.000
H6 1.883 0.749 0.886
H7 1.883 0.749 -0.886

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43802.46593.61251.08351.08651.0865
N21.43801.20512.37822.05922.08672.0867
C32.46591.20511.17773.24632.87092.8709
O43.61252.37821.17774.42403.90813.9081
H51.08352.05923.24634.42401.76371.7637
H61.08652.08672.87093.90811.76371.7711
H71.08652.08672.87093.90811.76371.7711

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.621 N2 C1 H5 108.686
N2 C1 H6 110.727 N2 C1 H7 110.727
N2 C3 O4 172.880 H5 C1 H6 108.731
H5 C1 H7 108.731 H6 C1 H7 109.189
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability