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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-206.755656
Energy at 298.15K 
HF Energy-206.755656
Nuclear repulsion energy102.998306
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 B3PW91/3-21G
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' 3135 3013 15.42      
2 A' 3044 2926 39.20      
3 A' 2451 2356 730.64      
4 A' 1557 1497 7.66      
5 A' 1516 1457 18.74      
6 A' 1471 1414 14.34      
7 A' 1170 1125 8.29      
8 A' 838 806 36.45      
9 A' 576 553 23.89      
10 A' 133 128 14.63      
11 A" 3104 2984 20.17      
12 A" 1567 1506 9.97      
13 A" 1149 1105 0.38      
14 A" 552 531 25.84      
15 A" 43 41 5.83      

Unscaled Zero Point Vibrational Energy (zpe) 11152.2 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 10719.4 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 B3PW91/3-21G
ABC
3.52885 0.13709 0.13536

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.132 1.388 0.000
N2 0.000 0.505 0.000
C3 -0.465 -0.594 0.000
O4 -1.036 -1.648 0.000
H5 0.783 2.424 0.000
H6 1.751 1.230 0.891
H7 1.751 1.230 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43572.54483.73071.09331.09691.0969
N21.43571.19282.38932.07282.09462.0946
C32.54481.19281.19933.26553.00513.0051
O43.73072.38931.19934.46004.10454.1045
H51.09332.07283.26554.46001.77701.7770
H61.09692.09463.00514.10451.77701.7830
H71.09692.09463.00514.10451.77701.7830

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 150.894 N2 C1 H5 109.346
N2 C1 H6 110.888 N2 C1 H7 110.888
N2 C3 O4 174.487 H5 C1 H6 108.458
H5 C1 H7 108.458 H6 C1 H7 108.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.436      
2 N -0.632      
3 C 0.801      
4 O -0.477      
5 H 0.255      
6 H 0.245      
7 H 0.245      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.490 2.382 0.000 3.446
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.965 -0.292 0.000
y -0.292 -24.499 0.000
z 0.000 0.000 -22.222
Traceless
 xyz
x 1.396 -0.292 0.000
y -0.292 -2.405 0.000
z 0.000 0.000 1.009
Polar
3z2-r22.019
x2-y22.534
xy-0.292
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.408 1.788 0.000
y 1.788 5.467 0.000
z 0.000 0.000 2.315


<r2> (average value of r2) Å2
<r2> 86.297
(<r2>)1/2 9.290