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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-207.782601
Energy at 298.15K 
HF Energy-207.582738
Nuclear repulsion energy103.471388
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 B2PLYP/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' 3190 3028 16.16 79.81 0.66 0.80
2 A' 3089 2932 45.17 140.00 0.01 0.02
3 A' 2380 2259 820.08 0.70 0.05 0.09
4 A' 1548 1469 3.58 14.03 0.74 0.85
5 A' 1508 1431 25.74 10.91 0.73 0.84
6 A' 1481 1406 27.16 32.50 0.29 0.45
7 A' 1182 1122 17.46 3.69 0.65 0.78
8 A' 889 844 30.51 10.94 0.21 0.35
9 A' 621 589 25.88 0.51 0.64 0.78
10 A' 180 171 16.61 1.73 0.67 0.80
11 A" 3159 2999 21.52 68.72 0.75 0.86
12 A" 1554 1476 5.03 21.76 0.75 0.86
13 A" 1155 1097 0.03 3.49 0.75 0.86
14 A" 566 537 23.38 0.64 0.75 0.86
15 A" 59 56 2.49 1.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11280.5 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 10707.4 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 B2PLYP/6-31G*
ABC
2.59854 0.14405 0.14011

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.352 1.100 0.000
N2 0.000 0.595 0.000
C3 -0.556 -0.480 0.000
O4 -1.235 -1.452 0.000
H5 1.316 2.189 0.000
H6 1.893 0.769 0.890
H7 1.893 0.769 -0.890

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44342.47753.63411.08961.09301.0930
N21.44341.21042.39072.06722.09932.0993
C32.47751.21041.18563.26032.88992.8899
O43.63412.39071.18564.44593.93833.9383
H51.08962.06723.26034.44591.77271.7727
H61.09302.09932.88993.93831.77271.7801
H71.09302.09932.88993.93831.77271.7801

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.841 N2 C1 H5 108.592
N2 C1 H6 110.963 N2 C1 H7 110.963
N2 C3 O4 172.434 H5 C1 H6 108.615
H5 C1 H7 108.615 H6 C1 H7 109.031
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.315      
2 N -0.435      
3 C 0.595      
4 O -0.398      
5 H 0.189      
6 H 0.182      
7 H 0.182      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.558 1.456 0.000 2.944
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.165 -0.438 -0.013
y -0.438 -24.588 -0.005
z -0.013 -0.005 -22.417
Traceless
 xyz
x 1.337 -0.438 -0.013
y -0.438 -2.297 -0.005
z -0.013 -0.005 0.960
Polar
3z2-r21.920
x2-y22.423
xy-0.438
xz-0.013
yz-0.005


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.381 1.919 0.001
y 1.919 5.370 -0.000
z 0.001 -0.000 2.756


<r2> (average value of r2) Å2
<r2> 83.877
(<r2>)1/2 9.158