return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-207.466023
Energy at 298.15K 
HF Energy-206.837109
Nuclear repulsion energy103.662855
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 MP2/6-311G*
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' 3205 3046 13.15 75.33 0.68 0.81
2 A' 3091 2937 45.86 143.85 0.01 0.02
3 A' 2389 2270 831.32 0.56 0.14 0.25
4 A' 1541 1464 7.07 9.79 0.72 0.84
5 A' 1501 1426 22.84 8.66 0.73 0.84
6 A' 1474 1400 24.25 30.39 0.28 0.43
7 A' 1176 1118 18.02 3.34 0.57 0.73
8 A' 898 854 27.51 16.51 0.21 0.35
9 A' 641 609 24.26 0.48 0.55 0.71
10 A' 184 175 19.32 1.72 0.70 0.82
11 A" 3176 3019 19.15 65.87 0.75 0.86
12 A" 1549 1472 7.69 15.18 0.75 0.86
13 A" 1156 1098 0.01 2.50 0.75 0.86
14 A" 585 556 19.38 0.52 0.75 0.86
15 A" 71 68 2.38 1.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11318.4 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 10755.9 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 MP2/6-311G*
ABC
2.45085 0.14589 0.14139

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.379 1.049 0.000
N2 0.000 0.612 0.000
C3 -0.570 -0.458 0.000
O4 -1.255 -1.419 0.000
H5 1.394 2.138 0.000
H6 1.899 0.690 0.890
H7 1.899 0.690 -0.890

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44672.46423.61011.08831.09171.0917
N21.44671.21262.38772.06642.09892.0989
C32.46421.21261.18013.25512.86532.8653
O43.61012.38771.18014.43483.89783.8978
H51.08832.06643.25514.43481.77271.7727
H61.09172.09892.86533.89781.77271.7802
H71.09172.09892.86533.89781.77271.7802

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 135.658 N2 C1 H5 108.380
N2 C1 H6 110.780 N2 C1 H7 110.780
N2 C3 O4 172.583 H5 C1 H6 108.808
H5 C1 H7 108.808 H6 C1 H7 109.235
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability