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: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-207.937860
Energy at 298.15K 
HF Energy-207.937860
Nuclear repulsion energy102.701274
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 BLYP/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' 3052 3029 20.14 85.70 0.63 0.77
2 A' 2960 2937 52.75 163.87 0.02 0.04
3 A' 2304 2286 725.13 1.07 0.02 0.03
4 A' 1476 1464 1.28 11.58 0.72 0.84
5 A' 1443 1432 20.04 12.57 0.74 0.85
6 A' 1416 1405 33.97 40.63 0.32 0.48
7 A' 1129 1120 15.23 3.43 0.66 0.79
8 A' 847 841 28.24 6.95 0.21 0.34
9 A' 589 585 20.31 0.66 0.73 0.85
10 A' 181 179 14.02 2.30 0.61 0.76
11 A" 3018 2995 27.06 78.28 0.75 0.86
12 A" 1479 1467 3.88 23.18 0.75 0.86
13 A" 1099 1090 0.02 3.68 0.75 0.86
14 A" 527 523 17.44 0.63 0.75 0.86
15 A" 54 54 2.13 0.98 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10786.4 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 10703.4 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 BLYP/6-31G**
ABC
2.56922 0.14193 0.13807

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.361 1.107 0.000
N2 0.000 0.599 0.000
C3 -0.556 -0.486 0.000
O4 -1.248 -1.460 0.000
H5 1.330 2.205 0.000
H6 1.913 0.777 0.896
H7 1.913 0.777 -0.896

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45292.49283.66021.09901.10271.1027
N21.45291.21952.40792.08492.11982.1198
C32.49281.21951.19463.28622.91452.9145
O43.66022.40791.19464.48083.97473.9747
H51.09902.08493.28624.48081.78431.7843
H61.10272.11982.91453.97471.78431.7923
H71.10272.11982.91453.97471.78431.7923

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.583 N2 C1 H5 108.782
N2 C1 H6 111.355 N2 C1 H7 111.355
N2 C3 O4 171.754 H5 C1 H6 108.268
H5 C1 H7 108.268 H6 C1 H7 108.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.159      
2 N -0.396      
3 C 0.564      
4 O -0.386      
5 H 0.128      
6 H 0.124      
7 H 0.124      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.420 1.392 0.000 2.792
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.083 -0.400 0.000
y -0.400 -24.362 0.000
z 0.000 0.000 -22.345
Traceless
 xyz
x 1.270 -0.400 0.000
y -0.400 -2.147 0.000
z 0.000 0.000 0.877
Polar
3z2-r21.754
x2-y22.278
xy-0.400
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.662 2.003 0.000
y 2.003 5.478 0.000
z 0.000 0.000 2.857


<r2> (average value of r2) Å2
<r2> 84.853
(<r2>)1/2 9.212