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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-206.835580
Energy at 298.15K 
HF Energy-206.835580
Nuclear repulsion energy102.872559
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 B3LYP/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' 3127 3008 17.59 89.09 0.61 0.76
2 A' 3041 2925 40.68 152.08 0.02 0.04
3 A' 2419 2327 720.52 5.62 0.19 0.31
4 A' 1562 1503 6.98 24.22 0.75 0.86
5 A' 1515 1457 25.20 12.67 0.69 0.81
6 A' 1459 1404 14.93 47.11 0.34 0.50
7 A' 1172 1128 9.68 2.80 0.70 0.82
8 A' 827 796 37.81 4.90 0.26 0.42
9 A' 576 554 22.76 0.50 0.41 0.58
10 A' 142 137 14.46 1.59 0.72 0.84
11 A" 3093 2975 22.91 75.83 0.75 0.86
12 A" 1573 1513 8.47 28.76 0.75 0.86
13 A" 1150 1106 0.14 2.69 0.75 0.86
14 A" 546 525 24.16 0.62 0.75 0.86
15 A" 42 40 5.00 1.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11121.7 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 10699.1 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 B3LYP/3-21G*
ABC
3.33757 0.13751 0.13546

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.191 1.336 0.000
N2 0.000 0.519 0.000
C3 -0.489 -0.572 0.000
O4 -1.089 -1.611 0.000
H5 0.904 2.389 0.000
H6 1.799 1.141 0.891
H7 1.799 1.141 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44392.54143.72541.09221.09601.0960
N21.44391.19512.39202.07722.10122.1012
C32.54141.19511.20003.27202.99292.9929
O43.72542.39201.20004.46904.08684.0868
H51.09222.07723.27204.46901.77601.7760
H61.09602.10122.99294.08681.77601.7820
H71.09602.10122.99294.08681.77601.7820

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 148.583 N2 C1 H5 109.196
N2 C1 H6 110.897 N2 C1 H7 110.897
N2 C3 O4 174.133 H5 C1 H6 108.508
H5 C1 H7 108.508 H6 C1 H7 108.771
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.382      
2 N -0.606      
3 C 0.772      
4 O -0.466      
5 H 0.233      
6 H 0.224      
7 H 0.224      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.540 2.192 0.000 3.355
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.009 -0.375 0.000
y -0.375 -24.619 0.000
z 0.000 0.000 -22.255
Traceless
 xyz
x 1.428 -0.375 0.000
y -0.375 -2.486 0.000
z 0.000 0.000 1.059
Polar
3z2-r22.117
x2-y22.610
xy-0.375
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.529 1.845 0.000
y 1.845 5.342 0.000
z 0.000 0.000 2.308


<r2> (average value of r2) Å2
<r2> 86.261
(<r2>)1/2 9.288