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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP3=FULL/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=FULL/6-31G**
 hartrees
Energy at 0K-207.422023
Energy at 298.15K 
HF Energy-206.794290
Nuclear repulsion energy104.045480
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/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' 3257 3257 15.89      
2 A' 3150 3150 42.62      
3 A' 2451 2451 1192.78      
4 A' 1578 1578 1.41      
5 A' 1552 1552 8.12      
6 A' 1525 1525 45.44      
7 A' 1197 1197 25.08      
8 A' 922 922 31.55      
9 A' 652 652 35.97      
10 A' 163 163 20.87      
11 A" 3231 3231 20.73      
12 A" 1575 1575 4.42      
13 A" 1169 1169 0.54      
14 A" 603 603 32.69      
15 A" 47 47 2.68      

Unscaled Zero Point Vibrational Energy (zpe) 11535.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11535.8 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/6-31G**
ABC
2.61889 0.14554 0.14154

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.351 1.092 0.000
N2 0.000 0.589 0.000
C3 -0.561 -0.473 0.000
O4 -1.228 -1.442 0.000
H5 1.316 2.176 0.000
H6 1.886 0.761 0.886
H7 1.886 0.761 -0.886

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44152.47103.61591.08381.08671.0867
N21.44151.20142.37352.06152.09092.0909
C32.47101.20141.17633.24672.88042.8804
O43.61592.37351.17634.42283.91653.9165
H51.08382.06153.24674.42281.76381.7638
H61.08672.09092.88043.91651.76381.7710
H71.08672.09092.88043.91651.76381.7710

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 138.272 N2 C1 H5 108.614
N2 C1 H6 110.813 N2 C1 H7 110.813
N2 C3 O4 173.248 H5 C1 H6 108.703
H5 C1 H7 108.703 H6 C1 H7 109.140
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability