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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: PBE1PBE/3-21G

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/3-21G
 hartrees
Energy at 0K-206.598203
Energy at 298.15K 
HF Energy-206.598203
Nuclear repulsion energy103.148553
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/3-21G
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' 3146 3022 14.01 89.42 0.65 0.79
2 A' 3055 2934 37.44 159.17 0.02 0.04
3 A' 2479 2381 766.61 7.96 0.21 0.35
4 A' 1561 1499 7.16 22.55 0.75 0.86
5 A' 1527 1466 16.26 6.91 0.61 0.76
6 A' 1483 1425 15.96 59.75 0.39 0.56
7 A' 1174 1128 7.62 2.02 0.69 0.82
8 A' 847 814 37.11 4.47 0.28 0.44
9 A' 577 554 25.89 0.49 0.44 0.62
10 A' 123 118 14.74 1.66 0.73 0.84
11 A" 3118 2995 18.21 77.31 0.75 0.86
12 A" 1570 1508 10.44 28.51 0.75 0.86
13 A" 1154 1109 0.36 2.00 0.75 0.86
14 A" 557 535 27.93 0.66 0.75 0.86
15 A" 39 37 6.43 1.54 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11205.5 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 10761.8 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/3-21G
ABC
3.68837 0.13690 0.13540

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.083 1.428 0.000
N2 0.000 0.493 0.000
C3 -0.445 -0.610 0.000
O4 -0.991 -1.676 0.000
H5 0.685 2.446 0.000
H6 1.709 1.301 0.891
H7 1.709 1.301 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43052.54723.73311.09321.09661.0966
N21.43051.18972.38492.06982.09002.0900
C32.54721.18971.19763.25873.01453.0145
O43.73312.38491.19764.45014.11684.1168
H51.09322.06983.25874.45011.77621.7762
H61.09662.09003.01454.11681.77621.7819
H71.09662.09003.01454.11681.77621.7819

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 152.769 N2 C1 H5 109.476
N2 C1 H6 110.899 N2 C1 H7 110.899
N2 C3 O4 174.827 H5 C1 H6 108.409
H5 C1 H7 108.409 H6 C1 H7 108.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.439      
2 N -0.653      
3 C 0.822      
4 O -0.487      
5 H 0.259      
6 H 0.249      
7 H 0.249      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.414 2.511 0.000 3.484
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.042 -0.285 0.000
y -0.285 -24.542 0.000
z 0.000 0.000 -22.264
Traceless
 xyz
x 1.361 -0.285 0.000
y -0.285 -2.389 0.000
z 0.000 0.000 1.028
Polar
3z2-r22.057
x2-y22.500
xy-0.285
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.294 1.730 0.000
y 1.730 5.541 0.000
z 0.000 0.000 2.305


<r2> (average value of r2) Å2
<r2> 86.327
(<r2>)1/2 9.291