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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B3PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-207.910502
Energy at 298.15K 
HF Energy-207.910502
Nuclear repulsion energy103.797865
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 B3PW91/6-31G**
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' 3149 3018 15.76      
2 A' 3048 2921 47.19      
3 A' 2424 2323 933.31      
4 A' 1534 1470 2.19      
5 A' 1495 1433 9.22      
6 A' 1466 1405 35.72      
7 A' 1158 1110 15.04      
8 A' 896 859 30.02      
9 A' 621 595 28.01      
10 A' 168 161 16.51      
11 A" 3120 2990 20.95      
12 A" 1512 1449 5.78      
13 A" 1129 1082 0.02      
14 A" 575 551 26.03      
15 A" 50 48 2.81      

Unscaled Zero Point Vibrational Energy (zpe) 11172.5 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 10707.7 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 B3PW91/6-31G**
ABC
2.79556 0.14360 0.14021

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.308 1.155 0.000
N2 0.000 0.572 0.000
C3 -0.541 -0.503 0.000
O4 -1.196 -1.485 0.000
H5 1.214 2.243 0.000
H6 1.874 0.860 0.890
H7 1.874 0.860 -0.890

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43232.48363.63851.09201.09531.0953
N21.43231.20342.37882.06572.09462.0946
C32.48361.20341.17993.25912.91242.9124
O43.63852.37881.17994.43883.96433.9643
H51.09202.06573.25914.43881.77211.7721
H61.09532.09462.91243.96431.77211.7800
H71.09532.09462.91243.96431.77211.7800

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 140.737 N2 C1 H5 109.099
N2 C1 H6 111.239 N2 C1 H7 111.239
N2 C3 O4 172.954 H5 C1 H6 108.232
H5 C1 H7 108.232 H6 C1 H7 108.705
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.244      
2 N -0.460      
3 C 0.642      
4 O -0.421      
5 H 0.165      
6 H 0.159      
7 H 0.159      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.499 1.591 0.000 2.963
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.965 -0.414 0.000
y -0.414 -24.304 0.000
z 0.000 0.000 -22.188
Traceless
 xyz
x 1.281 -0.414 0.000
y -0.414 -2.227 0.000
z 0.000 0.000 0.946
Polar
3z2-r21.892
x2-y22.339
xy-0.414
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.362 1.891 0.000
y 1.891 5.441 0.000
z 0.000 0.000 2.809


<r2> (average value of r2) Å2
<r2> 83.755
(<r2>)1/2 9.152