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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B3LYP/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 B3LYP/CEP-31G*
 hartrees
Energy at 0K-38.975021
Energy at 298.15K 
HF Energy-38.975021
Nuclear repulsion energy54.791466
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/CEP-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3144 3036 29.54 78.10 0.65 0.79
2 A' 3047 2942 62.91 169.30 0.01 0.02
3 A' 2347 2267 1022.19 0.52 0.23 0.37
4 A' 1495 1444 0.33 7.50 0.38 0.55
5 A' 1468 1417 15.17 17.76 0.60 0.75
6 A' 1449 1399 38.13 19.67 0.48 0.65
7 A' 1137 1098 16.62 4.51 0.71 0.83
8 A' 869 840 36.19 12.27 0.15 0.26
9 A' 617 595 26.58 0.61 0.75 0.85
10 A' 168 163 17.97 1.75 0.68 0.81
11 A" 3113 3007 39.34 69.35 0.75 0.86
12 A" 1500 1448 6.55 19.51 0.75 0.86
13 A" 1112 1074 0.01 3.75 0.75 0.86
14 A" 560 541 21.13 0.95 0.75 0.86
15 A" 9 9 2.39 1.18 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11017.3 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 10639.4 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 B3LYP/CEP-31G*
ABC
2.46133 0.14216 0.13799

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.385 1.080 0.000
N2 0.000 0.609 0.000
C3 -0.571 -0.470 0.000
O4 -1.262 -1.445 0.000
H5 1.380 2.180 0.000
H6 1.920 0.728 0.900
H7 1.920 0.728 -0.900

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.46252.49573.65811.10041.10411.1041
N21.46251.22132.41112.09062.12362.1236
C32.49571.22131.19503.29082.90732.9073
O43.65812.41111.19504.48563.95733.9573
H51.10042.09063.29084.48561.79121.7912
H61.10412.12362.90733.95731.79121.7995
H71.10412.12362.90733.95731.79121.7995

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.657 N2 C1 H5 108.489
N2 C1 H6 110.890 N2 C1 H7 110.890
N2 C3 O4 172.567 H5 C1 H6 108.683
H5 C1 H7 108.683 H6 C1 H7 109.149
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.448      
2 N 0.296      
3 C -0.378      
4 O -0.059      
5 H 0.212      
6 H 0.188      
7 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.755 1.479 0.000 3.128
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.061 -0.427 0.000
y -0.427 -24.678 0.000
z 0.000 0.000 -22.372
Traceless
 xyz
x 1.464 -0.427 0.000
y -0.427 -2.461 0.000
z 0.000 0.000 0.997
Polar
3z2-r21.995
x2-y22.617
xy-0.427
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.562 1.949 0.000
y 1.949 5.415 0.000
z 0.000 0.000 2.874


<r2> (average value of r2) Å2
<r2> 69.565
(<r2>)1/2 8.341