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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-204.347209
Energy at 298.15K 
HF Energy-204.075543
Nuclear repulsion energy100.372803
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/STO-3G
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' 3538 3085 0.29 34.05 0.71 0.83
2 A' 3346 2917 8.06 42.04 0.00 0.01
3 A' 2420 2110 145.75 1.39 0.52 0.68
4 A' 1697 1480 4.83 14.59 0.74 0.85
5 A' 1603 1398 36.62 7.77 0.73 0.84
6 A' 1425 1242 47.81 4.68 0.35 0.52
7 A' 1222 1066 21.27 3.45 0.50 0.67
8 A' 919 801 3.97 19.86 0.20 0.33
9 A' 591 515 10.91 1.42 0.75 0.86
10 A' 222 193 13.65 0.98 0.60 0.75
11 A" 3514 3064 1.79 26.60 0.75 0.86
12 A" 1701 1483 2.91 19.37 0.75 0.86
13 A" 1194 1041 1.28 2.24 0.75 0.86
14 A" 449 392 7.76 0.19 0.75 0.86
15 A" 128 112 1.86 0.69 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11984.5 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 10449.3 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/STO-3G
ABC
1.98423 0.14143 0.13551

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.487 0.925 0.000
N2 0.000 0.702 0.000
C3 -0.556 -0.448 0.000
O4 -1.397 -1.345 0.000
H5 1.666 2.017 0.000
H6 1.961 0.486 0.903
H7 1.961 0.486 -0.903

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.50382.46193.67001.10711.11001.1100
N21.50381.27742.47802.12282.16992.1699
C32.46191.27741.22913.31922.83332.8333
O43.67002.47801.22914.54823.93023.9302
H51.10712.12283.31924.54821.80171.8017
H61.11002.16992.83333.93021.80171.8055
H71.11002.16992.83333.93021.80171.8055

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 124.348 N2 C1 H5 107.819
N2 C1 H6 111.346 N2 C1 H7 111.346
N2 C3 O4 162.697 H5 C1 H6 108.708
H5 C1 H7 108.708 H6 C1 H7 108.840
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability