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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B3PW91/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B3PW91/TZVP
 hartrees
Energy at 0K-207.981803
Energy at 298.15K 
HF Energy-207.981803
Nuclear repulsion energy104.213771
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 B3PW91/TZVP
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' 3133 3021 13.75 84.88 0.63 0.77
2 A' 3037 2929 46.24 199.01 0.01 0.03
3 A' 2424 2338 1109.34 3.25 0.03 0.06
4 A' 1536 1482 1.72 17.57 0.15 0.27
5 A' 1486 1433 11.21 19.32 0.61 0.76
6 A' 1460 1408 30.48 19.74 0.40 0.57
7 A' 1154 1113 14.77 2.62 0.65 0.79
8 A' 882 851 32.01 6.57 0.17 0.29
9 A' 637 614 32.32 0.57 0.65 0.79
10 A' 161 155 17.57 2.52 0.72 0.84
11 A" 3103 2992 19.66 78.74 0.75 0.86
12 A" 1501 1448 7.73 15.66 0.75 0.86
13 A" 1130 1090 0.01 1.74 0.75 0.86
14 A" 604 582 29.77 0.79 0.75 0.86
15 A" 51 49 3.12 1.68 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11149.2 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 10751.1 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 B3PW91/TZVP
ABC
2.99226 0.14341 0.14049

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.266 1.208 0.000
N2 0.000 0.547 0.000
C3 -0.529 -0.522 0.000
O4 -1.153 -1.515 0.000
H5 1.108 2.286 0.000
H6 1.846 0.945 0.889
H7 1.846 0.945 -0.889

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.42832.49303.64201.08961.09311.0931
N21.42831.19262.36232.06172.08682.0868
C32.49301.19261.17263.24992.92942.9294
O43.64202.36231.17264.42213.97863.9786
H51.08962.06173.24994.42211.76981.7698
H61.09312.08682.92943.97861.76981.7778
H71.09312.08682.92943.97861.76981.7778

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 143.905 N2 C1 H5 109.190
N2 C1 H6 111.016 N2 C1 H7 111.016
N2 C3 O4 174.262 H5 C1 H6 108.359
H5 C1 H7 108.359 H6 C1 H7 108.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.275      
2 N -0.259      
3 C 0.405      
4 O -0.308      
5 H 0.152      
6 H 0.142      
7 H 0.142      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.596 1.870 0.000 3.199
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.519 -0.605 0.000
y -0.605 -24.983 0.000
z 0.000 0.000 -22.488
Traceless
 xyz
x 1.216 -0.605 0.000
y -0.605 -2.479 0.000
z 0.000 0.000 1.263
Polar
3z2-r22.526
x2-y22.464
xy-0.605
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.645 1.957 0.000
y 1.957 6.079 0.000
z 0.000 0.000 3.180


<r2> (average value of r2) Å2
<r2> 83.972
(<r2>)1/2 9.164