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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: HF/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-206.816140
Energy at 298.15K 
HF Energy-206.816140
Nuclear repulsion energy105.353609
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/6-31G(2df,p)
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' 3282 2972 23.06 74.38 0.67 0.80
2 A' 3187 2886 44.01 129.88 0.01 0.02
3 A' 2516 2278 1592.02 1.81 0.05 0.10
4 A' 1647 1491 2.67 5.89 0.13 0.23
5 A' 1608 1456 8.71 16.52 0.65 0.78
6 A' 1581 1431 58.38 11.02 0.37 0.54
7 A' 1253 1135 28.07 2.08 0.67 0.80
8 A' 934 846 46.22 9.60 0.18 0.31
9 A' 746 675 55.29 0.32 0.65 0.79
10 A' 145 131 22.95 0.84 0.67 0.80
11 A" 3256 2949 28.30 63.86 0.75 0.86
12 A" 1627 1473 4.61 14.94 0.75 0.86
13 A" 1232 1116 0.90 1.84 0.75 0.86
14 A" 714 646 48.96 0.88 0.75 0.86
15 A" 32i 29i 2.46 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11848.0 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 10728.3 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/6-31G(2df,p)
ABC
2.71811 0.14852 0.14462

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.338 1.092 0.000
N2 0.000 0.564 0.000
C3 -0.568 -0.469 0.000
O4 -1.207 -1.425 0.000
H5 1.285 2.171 0.000
H6 1.878 0.770 0.883
H7 1.878 0.770 -0.883

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43782.46363.57891.08071.08381.0838
N21.43781.17942.32672.05782.08502.0850
C32.46361.17941.14943.22622.88072.8807
O43.57892.32671.14944.37543.88743.8874
H51.08072.05783.22624.37541.75881.7588
H61.08382.08502.88073.88741.75881.7658
H71.08382.08502.88073.88741.75881.7658

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 140.341 N2 C1 H5 108.754
N2 C1 H6 110.771 N2 C1 H7 110.771
N2 C3 O4 175.072 H5 C1 H6 108.692
H5 C1 H7 108.692 H6 C1 H7 109.108
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.273      
2 N -0.441      
3 C 0.625      
4 O -0.406      
5 H 0.170      
6 H 0.163      
7 H 0.163      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.589 1.546 0.000 3.016
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.309 -0.758 0.000
y -0.758 -24.876 0.000
z 0.000 0.000 -22.300
Traceless
 xyz
x 1.279 -0.758 0.000
y -0.758 -2.572 0.000
z 0.000 0.000 1.293
Polar
3z2-r22.586
x2-y22.567
xy-0.758
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.370 1.563 0.000
y 1.563 5.058 0.000
z 0.000 0.000 3.039


<r2> (average value of r2) Å2
<r2> 81.899
(<r2>)1/2 9.050