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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-208.006220
Energy at 298.15K 
HF Energy-208.006220
Nuclear repulsion energy103.995052
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 B3LYP/6-31G(2df,p)
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' 3121 3011 16.13 77.64 0.65 0.79
2 A' 3030 2924 45.30 148.20 0.02 0.03
3 A' 2400 2316 940.15 1.30 0.04 0.08
4 A' 1522 1469 1.39 7.98 0.14 0.25
5 A' 1486 1434 9.85 19.85 0.63 0.77
6 A' 1460 1409 40.74 23.19 0.37 0.54
7 A' 1159 1118 16.97 1.94 0.69 0.81
8 A' 882 851 29.05 7.23 0.19 0.31
9 A' 648 626 27.61 0.46 0.71 0.83
10 A' 171 165 15.60 1.75 0.58 0.74
11 A" 3092 2984 20.57 69.91 0.75 0.86
12 A" 1504 1451 4.64 17.71 0.75 0.86
13 A" 1136 1096 0.02 2.05 0.75 0.86
14 A" 603 581 23.42 0.68 0.75 0.86
15 A" 34 33 1.91 0.68 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11123.3 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 10734.0 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 B3LYP/6-31G(2df,p)
ABC
2.71361 0.14469 0.14104

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.328 1.125 0.000
N2 0.000 0.576 0.000
C3 -0.553 -0.488 0.000
O4 -1.210 -1.462 0.000
H5 1.263 2.215 0.000
H6 1.886 0.815 0.890
H7 1.886 0.815 -0.890

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43672.47853.62421.09201.09521.0952
N21.43671.20012.37072.06902.09862.0986
C32.47851.20011.17453.25712.90502.9050
O43.62422.37071.17454.43163.94443.9444
H51.09202.06903.25714.43161.77251.7725
H61.09522.09862.90503.94441.77251.7797
H71.09522.09862.90503.94441.77251.7797

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 139.921 N2 C1 H5 109.045
N2 C1 H6 111.246 N2 C1 H7 111.246
N2 C3 O4 173.480 H5 C1 H6 108.263
H5 C1 H7 108.263 H6 C1 H7 108.685
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.318      
2 N -0.358      
3 C 0.542      
4 O -0.309      
5 H 0.150      
6 H 0.146      
7 H 0.146      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.343 1.486 0.000 2.774
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.120 -0.532 0.000
y -0.532 -24.267 0.000
z 0.000 0.000 -22.181
Traceless
 xyz
x 1.104 -0.532 0.000
y -0.532 -2.116 0.000
z 0.000 0.000 1.013
Polar
3z2-r22.025
x2-y22.147
xy-0.532
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.723 1.811 0.000
y 1.811 5.478 0.000
z 0.000 0.000 3.140


<r2> (average value of r2) Å2
<r2> 83.387
(<r2>)1/2 9.132