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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP3/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 MP3/TZVP
 hartrees
Energy at 0K-207.503168
Energy at 298.15K 
HF Energy-206.860699
Nuclear repulsion energy104.554518
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 MP3/TZVP
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' 3208 3000 14.72      
2 A' 3105 2903 43.58      
3 A' 2427 2270 1384.44      
4 A' 1565 1464 1.70      
5 A' 1524 1425 7.66      
6 A' 1508 1410 46.67      
7 A' 1191 1114 26.54      
8 A' 916 857 34.20      
9 A' 673 630 37.77      
10 A' 164 153 21.95      
11 A" 3177 2971 21.22      
12 A" 1534 1435 5.89      
13 A" 1163 1088 1.03      
14 A" 626 585 33.96      
15 A" 56 52 2.35      

Unscaled Zero Point Vibrational Energy (zpe) 11418.2 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 10678.3 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 MP3/TZVP
ABC
2.49371 0.14816 0.14363

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.374 1.041 0.000
N2 0.000 0.597 0.000
C3 -0.577 -0.449 0.000
O4 -1.244 -1.404 0.000
H5 1.388 2.126 0.000
H6 1.895 0.685 0.887
H7 1.895 0.685 -0.887

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44342.45463.58221.08541.08911.0891
N21.44341.19482.35692.06522.09392.0939
C32.45461.19481.16533.23952.86042.8604
O43.58222.35691.16534.40403.87333.8733
H51.08542.06523.23954.40401.76721.7672
H61.08912.09392.86043.87331.76721.7747
H71.08912.09392.86043.87331.76721.7747

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.797 N2 C1 H5 108.679
N2 C1 H6 110.772 N2 C1 H7 110.772
N2 C3 O4 173.985 H5 C1 H6 108.717
H5 C1 H7 108.717 H6 C1 H7 109.133
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability