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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-207.380283
Energy at 298.15K 
HF Energy-206.789188
Nuclear repulsion energy103.846087
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 MP3/6-31G*
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' 3218 3020 13.46      
2 A' 3116 2925 37.65      
3 A' 2440 2290 1185.53      
4 A' 1570 1474 1.59      
5 A' 1543 1448 9.65      
6 A' 1516 1423 36.91      
7 A' 1190 1117 23.12      
8 A' 918 862 32.67      
9 A' 649 609 35.91      
10 A' 166 156 21.17      
11 A" 3192 2996 17.79      
12 A" 1565 1469 5.90      
13 A" 1164 1092 0.18      
14 A" 595 559 32.35      
15 A" 52 49 2.77      

Unscaled Zero Point Vibrational Energy (zpe) 11446.8 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 10743.9 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 MP3/6-31G*
ABC
2.58095 0.14525 0.14120

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.358 1.086 0.000
N2 0.000 0.591 0.000
C3 -0.563 -0.471 0.000
O4 -1.236 -1.438 0.000
H5 1.327 2.176 0.000
H6 1.893 0.749 0.892
H7 1.893 0.749 -0.892

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44552.47353.61941.09001.09311.0931
N21.44551.20292.37602.06712.09842.0984
C32.47351.20291.17753.25322.88392.8839
O43.61942.37601.17754.43073.92003.9200
H51.09002.06713.25324.43071.77521.7752
H61.09312.09842.88393.92001.77521.7830
H71.09312.09842.88393.92001.77521.7830

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.937 N2 C1 H5 108.410
N2 C1 H6 110.738 N2 C1 H7 110.738
N2 C3 O4 173.090 H5 C1 H6 108.808
H5 C1 H7 108.808 H6 C1 H7 109.289
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability