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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: G3B3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at G3B3
 hartrees
Energy at 0K-207.858522
Energy at 298.15K-207.852790
HF Energy-207.988076
Nuclear repulsion energy103.616117
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*
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' 3142 3017 18.92 84.76 0.64 0.78
2 A' 3048 2927 47.98 151.32 0.02 0.03
3 A' 2398 2302 917.29 1.54 0.05 0.09
4 A' 1533 1472 0.85 8.75 0.56 0.72
5 A' 1504 1444 11.55 18.35 0.57 0.73
6 A' 1482 1423 41.81 34.96 0.38 0.55
7 A' 1170 1124 16.33 3.34 0.67 0.80
8 A' 884 849 32.06 7.26 0.21 0.35
9 A' 618 594 27.61 0.51 0.70 0.82
10 A' 170 163 15.98 1.87 0.65 0.79
11 A" 3109 2986 24.68 75.30 0.75 0.86
12 A" 1534 1473 4.92 22.61 0.75 0.86
13 A" 1142 1096 0.00 3.35 0.75 0.86
14 A" 568 546 25.21 0.70 0.75 0.86
15 A" 49 47 2.54 1.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11174.8 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 10731.2 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*
ABC
2.71622 0.14355 0.13997

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.328 1.134 0.000
N2 0.000 0.579 0.000
C3 -0.549 -0.494 0.000
O4 -1.213 -1.471 0.000
H5 1.257 2.224 0.000
H6 1.887 0.825 0.891
H7 1.887 0.825 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43972.48493.63961.09261.09611.0961
N21.43971.20522.38212.07072.10092.1009
C32.48491.20521.18153.26362.90942.9094
O43.63962.38211.18154.44513.95913.9591
H51.09262.07073.26364.44511.77451.7745
H61.09612.10092.90943.95911.77451.7823
H71.09612.10092.90943.95911.77451.7823

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 139.775 N2 C1 H5 108.948
N2 C1 H6 111.165 N2 C1 H7 111.165
N2 C3 O4 172.875 H5 C1 H6 108.347
H5 C1 H7 108.347 H6 C1 H7 108.786
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.312      
2 N -0.423      
3 C 0.613      
4 O -0.413      
5 H 0.182      
6 H 0.176      
7 H 0.176      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.491 1.534 0.000 2.925
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 83.940
(<r2>)1/2 9.162