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: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-207.806148
Energy at 298.15K 
HF Energy-207.806148
Nuclear repulsion energy103.418404
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 PBEPBE/6-311G*
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' 3057 3025 20.45 89.85 0.64 0.78
2 A' 2962 2931 56.13 182.25 0.02 0.04
3 A' 2344 2319 814.81 1.67 0.01 0.03
4 A' 1479 1464 1.98 7.94 0.25 0.40
5 A' 1449 1434 13.19 20.72 0.54 0.70
6 A' 1424 1409 27.96 33.02 0.39 0.56
7 A' 1127 1115 13.40 2.58 0.61 0.76
8 A' 872 863 27.09 6.80 0.22 0.36
9 A' 612 606 22.03 0.55 0.71 0.83
10 A' 179 177 15.42 2.30 0.63 0.78
11 A" 3022 2991 28.48 87.31 0.75 0.86
12 A" 1476 1460 7.12 17.42 0.75 0.86
13 A" 1100 1089 0.15 2.37 0.75 0.86
14 A" 561 555 18.70 0.62 0.75 0.86
15 A" 58 57 2.23 1.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10860.6 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 10747.7 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 PBEPBE/6-311G*
ABC
2.63618 0.14364 0.13987

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.340 1.116 0.000
N2 0.000 0.589 0.000
C3 -0.554 -0.487 0.000
O4 -1.225 -1.462 0.000
H5 1.293 2.213 0.000
H6 1.897 0.796 0.895
H7 1.897 0.796 -0.895

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43972.48133.63651.09811.10191.1019
N21.43971.21052.38892.07602.10782.1078
C32.48131.21051.18343.27162.90792.9079
O43.63652.38891.18344.45503.95573.9557
H51.09812.07603.27164.45501.78171.7817
H61.10192.10782.90793.95571.78171.7903
H71.10192.10782.90793.95571.78171.7903

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 138.709 N2 C1 H5 109.033
N2 C1 H6 111.367 N2 C1 H7 111.367
N2 C3 O4 172.680 H5 C1 H6 108.158
H5 C1 H7 108.158 H6 C1 H7 108.652
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.547      
2 N -0.330      
3 C 0.419      
4 O -0.251      
5 H 0.241      
6 H 0.234      
7 H 0.234      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.420 1.422 0.000 2.807
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.321 -0.376 0.000
y -0.376 -24.582 0.000
z 0.000 0.000 -22.579
Traceless
 xyz
x 1.259 -0.376 0.000
y -0.376 -2.132 0.000
z 0.000 0.000 0.872
Polar
3z2-r21.745
x2-y22.261
xy-0.376
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.746 1.966 0.000
y 1.966 5.603 0.000
z 0.000 0.000 3.021


<r2> (average value of r2) Å2
<r2> 84.145
(<r2>)1/2 9.173