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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP4=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 MP4=FULL/3-21G
 hartrees
Energy at 0K-206.086567
Energy at 298.15K 
HF Energy-205.615393
Nuclear repulsion energy101.389319
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 MP4=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' 3124 3058        
2 A' 3029 2965        
3 A' 2255 2207        
4 A' 1573 1540        
5 A' 1506 1474        
6 A' 1339 1311        
7 A' 1167 1143        
8 A' 795 778        
9 A' 564 552        
10 A' 192 188        
11 A" 3088 3023        
12 A" 1582 1549        
13 A" 1156 1132        
14 A" 497 487        
15 A" 68 66        

Unscaled Zero Point Vibrational Energy (zpe) 10967.8 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 10735.3 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 MP4=FULL/3-21G
ABC
2.64863 0.13717 0.13376

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.363 1.160 0.000
N2 0.000 0.593 0.000
C3 -0.545 -0.504 0.000
O4 -1.252 -1.503 0.000
H5 1.278 2.252 0.000
H6 1.915 0.842 0.896
H7 1.915 0.842 -0.896

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.47592.53153.73181.09501.09901.0990
N21.47591.22522.44162.09332.12852.1285
C32.53151.22521.22373.30372.94382.9438
O43.73182.44161.22374.52704.04094.0409
H51.09502.09333.30374.52701.78721.7872
H61.09902.12852.94384.04091.78721.7916
H71.09902.12852.94384.04091.78721.7916

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 139.000 N2 C1 H5 108.107
N2 C1 H6 110.660 N2 C1 H7 110.660
N2 C3 O4 171.177 H5 C1 H6 109.091
H5 C1 H7 109.091 H6 C1 H7 109.195
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability