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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B3LYP/CEP-121G*

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-121G*
 hartrees
Energy at 0K-38.987265
Energy at 298.15K 
HF Energy-38.987265
Nuclear repulsion energy55.074292
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-121G*
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' 3121 3026 25.92 88.57 0.65 0.78
2 A' 3021 2929 60.63 180.03 0.01 0.03
3 A' 2313 2242 1025.52 1.28 0.02 0.04
4 A' 1506 1460 1.60 9.66 0.71 0.83
5 A' 1474 1429 27.53 10.97 0.75 0.85
6 A' 1447 1402 30.89 32.23 0.27 0.43
7 A' 1151 1116 17.20 4.51 0.66 0.79
8 A' 862 836 36.27 10.52 0.18 0.31
9 A' 621 602 27.71 0.47 0.70 0.82
10 A' 167 162 17.19 1.82 0.68 0.81
11 A" 3088 2993 35.76 82.64 0.75 0.86
12 A" 1513 1467 5.29 18.47 0.75 0.86
13 A" 1123 1089 0.05 3.39 0.75 0.86
14 A" 569 551 22.54 0.80 0.75 0.86
15 A" 44 42 2.27 1.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11009.5 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 10672.6 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-121G*
ABC
2.52370 0.14321 0.13912

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.375 1.084 0.000
N2 0.000 0.599 0.000
C3 -0.570 -0.470 0.000
O4 -1.252 -1.443 0.000
H5 1.361 2.178 0.000
H6 1.912 0.741 0.893
H7 1.912 0.741 -0.893

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45812.48993.64511.09371.09741.0974
N21.45811.21212.39532.08432.11552.1155
C32.48991.21211.18773.27752.90312.9031
O43.64512.39531.18774.46513.94743.9474
H51.09372.08433.27754.46511.77901.7790
H61.09742.11552.90313.94741.77901.7868
H71.09742.11552.90313.94741.77901.7868

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.464 N2 C1 H5 108.698
N2 C1 H6 110.970 N2 C1 H7 110.970
N2 C3 O4 172.991 H5 C1 H6 108.571
H5 C1 H7 108.571 H6 C1 H7 108.996
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.445      
2 N 0.016      
3 C 0.091      
4 O -0.236      
5 H 0.199      
6 H 0.187      
7 H 0.187      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.660 1.491 0.000 3.049
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.350 -0.479 0.000
y -0.479 -24.852 0.000
z 0.000 0.000 -22.574
Traceless
 xyz
x 1.363 -0.479 0.000
y -0.479 -2.390 0.000
z 0.000 0.000 1.027
Polar
3z2-r22.053
x2-y22.502
xy-0.479
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.819 1.921 0.000
y 1.921 5.677 0.000
z 0.000 0.000 3.163


<r2> (average value of r2) Å2
<r2> 69.272
(<r2>)1/2 8.323