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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: HF/CEP-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 HF/CEP-31G
 hartrees
Energy at 0K-37.978465
Energy at 298.15K 
HF Energy-37.978465
Nuclear repulsion energy54.858400
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 HF/CEP-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' 3340 3011 50.96 85.66 0.75 0.86
2 A' 3241 2921 75.36 220.61 0.00 0.00
3 A' 2548 2297 1589.33 21.49 0.19 0.32
4 A' 1638 1476 10.69 22.55 0.75 0.86
5 A' 1603 1445 50.97 13.48 0.71 0.83
6 A' 1528 1377 18.57 16.17 0.32 0.48
7 A' 1264 1139 1.33 1.58 0.75 0.86
8 A' 837 754 89.53 7.11 0.22 0.36
9 A' 625 563 75.11 1.49 0.75 0.86
10 A' 108 97 11.62 4.12 0.75 0.86
11 A" 3340 3011 50.96 85.66 0.75 0.86
12 A" 1638 1476 10.70 22.55 0.75 0.86
13 A" 1264 1139 1.32 1.58 0.75 0.86
14 A" 625 563 75.11 1.49 0.75 0.86
15 A" 108 97 11.62 4.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11852.5 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 10683.8 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 HF/CEP-31G
ABC
5.32405 0.13104 0.13104

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 1.845 0.000
N2 0.000 0.400 0.000
C3 0.000 -0.774 0.000
O4 0.000 -1.982 0.000
H5 -1.024 2.208 0.000
H6 0.511 2.209 0.886
H7 0.511 2.209 -0.886

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44422.61813.82631.08621.08611.0861
N21.44421.17392.38212.07772.07762.0776
C32.61811.17391.20813.15293.15283.1528
O43.82632.38211.20814.31344.31344.3134
H51.08622.07773.15294.31341.77251.7725
H61.08612.07763.15284.31341.77251.7725
H71.08612.07763.15284.31341.77251.7725

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 179.997 N2 C1 H5 109.584
N2 C1 H6 109.576 N2 C1 H7 109.576
N2 C3 O4 179.993 H5 C1 H6 109.365
H5 C1 H7 109.365 H6 C1 H7 109.362
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.212      
2 N 0.201      
3 C -0.272      
4 O -0.255      
5 H 0.180      
6 H 0.180      
7 H 0.180      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.001 5.015 0.000 5.015
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.608 -0.000 0.000
y -0.000 -27.535 0.000
z 0.000 0.000 -22.608
Traceless
 xyz
x 2.464 -0.000 0.000
y -0.000 -4.927 0.000
z 0.000 0.000 2.464
Polar
3z2-r24.927
x2-y24.927
xy-0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.396 -0.000 0.000
y -0.000 6.588 0.000
z 0.000 0.000 2.396


<r2> (average value of r2) Å2
<r2> 73.289
(<r2>)1/2 8.561