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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-207.434681
Energy at 298.15K 
HF Energy-206.804554
Nuclear repulsion energy103.392568
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/cc-pVDZ
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' 3172 3043 17.21      
2 A' 3064 2940 49.31      
3 A' 2338 2243 932.47      
4 A' 1506 1445 2.54      
5 A' 1472 1413 8.49      
6 A' 1462 1403 53.35      
7 A' 1158 1111 21.95      
8 A' 917 880 29.24      
9 A' 658 631 26.75      
10 A' 184 177 17.56      
11 A" 3143 3016 24.21      
12 A" 1509 1448 4.64      
13 A" 1130 1084 0.34      
14 A" 590 566 23.17      
15 A" 48 46 1.71      

Unscaled Zero Point Vibrational Energy (zpe) 11175.2 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 10721.5 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/cc-pVDZ
ABC
2.20831 0.14765 0.14220

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.416 0.974 0.000
N2 0.000 0.643 0.000
C3 -0.591 -0.425 0.000
O4 -1.289 -1.377 0.000
H5 1.518 2.071 0.000
H6 1.919 0.577 0.899
H7 1.919 0.577 -0.899

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45432.44633.58401.10101.10451.1045
N21.45431.21992.39582.08422.12042.1204
C32.44631.21991.18083.26712.84782.8478
O43.58402.39581.18084.44583.86213.8621
H51.10102.08423.26714.44581.78941.7894
H61.10452.12042.84783.86211.78941.7982
H71.10452.12042.84783.86211.78941.7982

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 132.146 N2 C1 H5 108.504
N2 C1 H6 111.185 N2 C1 H7 111.185
N2 C3 O4 172.715 H5 C1 H6 108.452
H5 C1 H7 108.452 H6 C1 H7 108.983
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability