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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD/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 QCISD/6-31G**
 hartrees
Energy at 0K-207.420600
Energy at 298.15K 
HF Energy-206.792425
Nuclear repulsion energy103.531206
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 QCISD/6-31G**
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' 3222 3033 17.99      
2 A' 3116 2933 45.76      
3 A' 2371 2232 935.49      
4 A' 1558 1466 2.63      
5 A' 1515 1426 29.03      
6 A' 1495 1408 27.65      
7 A' 1187 1118 23.37      
8 A' 907 853 30.09      
9 A' 638 601 30.69      
10 A' 176 166 18.81      
11 A" 3195 3008 23.66      
12 A" 1564 1473 3.88      
13 A" 1160 1092 0.62      
14 A" 579 545 28.63      
15 A" 56 52 2.46      

Unscaled Zero Point Vibrational Energy (zpe) 11368.6 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 10702.4 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 QCISD/6-31G**
ABC
2.47971 0.14520 0.14081

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.376 1.061 0.000
N2 0.000 0.609 0.000
C3 -0.568 -0.460 0.000
O4 -1.253 -1.428 0.000
H5 1.380 2.147 0.000
H6 1.900 0.708 0.888
H7 1.900 0.708 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44802.46843.61981.08671.08991.0899
N21.44801.21092.39132.06682.09932.0993
C32.46841.21091.18533.25522.87142.8714
O43.61982.39131.18534.44023.91023.9102
H51.08672.06683.25524.44021.76941.7694
H61.08992.09932.87143.91021.76941.7765
H71.08992.09932.87143.91021.76941.7765

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.179 N2 C1 H5 108.405
N2 C1 H6 110.836 N2 C1 H7 110.836
N2 C3 O4 172.720 H5 C1 H6 108.768
H5 C1 H7 108.768 H6 C1 H7 109.175
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability