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: PBE1PBE/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 PBE1PBE/6-31G**
 hartrees
Energy at 0K-207.751716
Energy at 298.15K 
HF Energy-207.751716
Nuclear repulsion energy103.961154
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 PBE1PBE/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' 3172 3023 14.90 84.35 0.66 0.80
2 A' 3071 2927 45.42 155.62 0.01 0.03
3 A' 2446 2331 967.71 2.07 0.07 0.14
4 A' 1553 1480 2.50 11.53 0.17 0.29
5 A' 1515 1444 9.57 26.37 0.61 0.76
6 A' 1485 1415 34.44 25.90 0.47 0.64
7 A' 1171 1116 15.33 2.87 0.65 0.78
8 A' 909 866 30.32 7.03 0.21 0.35
9 A' 627 598 29.32 0.49 0.68 0.81
10 A' 165 157 16.96 1.88 0.65 0.79
11 A" 3142 2995 19.74 75.21 0.75 0.86
12 A" 1532 1461 6.23 22.09 0.75 0.86
13 A" 1142 1089 0.02 2.91 0.75 0.86
14 A" 583 555 27.36 0.71 0.75 0.86
15 A" 47 45 2.91 1.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11279.3 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 10750.3 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 PBE1PBE/6-31G**
ABC
2.81798 0.14396 0.14062

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.300 1.160 0.000
N2 0.000 0.569 0.000
C3 -0.538 -0.505 0.000
O4 -1.188 -1.487 0.000
H5 1.198 2.248 0.000
H6 1.868 0.868 0.891
H7 1.868 0.868 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.42862.48083.63361.09241.09571.0957
N21.42861.20132.37472.06282.09112.0911
C32.48081.20131.17773.25492.91042.9104
O43.63362.37471.17774.43243.96023.9602
H51.09242.06283.25494.43241.77331.7733
H61.09572.09112.91043.96021.77331.7812
H71.09572.09112.91043.96021.77331.7812

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 141.080 N2 C1 H5 109.092
N2 C1 H6 111.179 N2 C1 H7 111.179
N2 C3 O4 173.124 H5 C1 H6 108.278
H5 C1 H7 108.278 H6 C1 H7 108.747
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.385      
2 N -0.448      
3 C 0.640      
4 O -0.418      
5 H 0.208      
6 H 0.201      
7 H 0.201      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.485 1.595 0.000 2.953
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.031 -0.419 0.000
y -0.419 -24.353 0.000
z 0.000 0.000 -22.235
Traceless
 xyz
x 1.263 -0.419 0.000
y -0.419 -2.220 0.000
z 0.000 0.000 0.957
Polar
3z2-r21.914
x2-y22.322
xy-0.419
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.272 1.859 0.000
y 1.859 5.387 0.000
z 0.000 0.000 2.770


<r2> (average value of r2) Å2
<r2> 83.597
(<r2>)1/2 9.143