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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP3=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP3=FULL/3-21G
 hartrees
Energy at 0K-206.035225
Energy at 298.15K 
HF Energy-205.624239
Nuclear repulsion energy102.836124
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 MP3=FULL/3-21G
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' 3161 3161 15.68      
2 A' 3075 3075 32.59      
3 A' 2438 2438 967.53      
4 A' 1591 1591 5.67      
5 A' 1538 1538 37.73      
6 A' 1499 1499 8.51      
7 A' 1192 1192 16.17      
8 A' 839 839 42.40      
9 A' 569 569 33.85      
10 A' 139 139 19.22      
11 A" 3131 3131 19.99      
12 A" 1601 1601 7.04      
13 A" 1179 1179 0.15      
14 A" 528 528 33.13      
15 A" 51 51 5.78      

Unscaled Zero Point Vibrational Energy (zpe) 11265.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11265.8 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 MP3=FULL/3-21G
ABC
3.37812 0.13710 0.13514

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.194 1.344 0.000
N2 0.000 0.511 0.000
C3 -0.484 -0.577 0.000
O4 -1.093 -1.608 0.000
H5 0.890 2.393 0.000
H6 1.798 1.147 0.893
H7 1.798 1.147 -0.893

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45582.55093.73441.09211.09561.0956
N21.45581.19112.38452.08182.10572.1057
C32.55091.19111.19733.27272.99642.9964
O43.73442.38451.19734.46564.09234.0923
H51.09212.08183.27274.46561.78111.7811
H61.09562.10572.99644.09231.78111.7860
H71.09562.10572.99644.09231.78111.7860

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 148.876 N2 C1 H5 108.746
N2 C1 H6 110.443 N2 C1 H7 110.443
N2 C3 O4 173.400 H5 C1 H6 108.999
H5 C1 H7 108.999 H6 C1 H7 109.180
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability