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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-207.623752
Energy at 298.15K 
HF Energy-206.875139
Nuclear repulsion energy103.869340
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 MP2/Def2TZVPP
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' 3198 3043 8.98 66.97 0.67 0.80
2 A' 3091 2941 42.66 179.08 0.01 0.01
3 A' 2368 2253 924.98 0.95 0.08 0.15
4 A' 1523 1449 5.08 5.26 0.57 0.73
5 A' 1483 1411 15.87 9.55 0.46 0.63
6 A' 1464 1393 32.58 27.83 0.23 0.38
7 A' 1169 1113 20.13 1.53 0.63 0.77
8 A' 891 848 25.31 16.56 0.16 0.28
9 A' 639 608 24.87 0.44 0.73 0.85
10 A' 179 171 19.15 2.07 0.69 0.82
11 A" 3173 3019 12.78 60.24 0.75 0.86
12 A" 1528 1454 6.54 10.26 0.75 0.86
13 A" 1147 1091 0.11 0.98 0.75 0.86
14 A" 587 559 16.88 0.41 0.75 0.86
15 A" 61 58 1.85 1.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11250.4 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 10704.8 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 MP2/Def2TZVPP
ABC
2.55084 0.14567 0.14147

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.360 1.076 0.000
N2 0.000 0.601 0.000
C3 -0.562 -0.469 0.000
O4 -1.239 -1.435 0.000
H5 1.348 2.161 0.000
H6 1.888 0.733 0.886
H7 1.888 0.733 -0.886

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44032.46543.61351.08461.08761.0876
N21.44031.20802.38302.06182.08992.0899
C32.46541.20801.17983.24992.86892.8689
O43.61352.38301.17984.42963.90663.9066
H51.08462.06183.24994.42961.76531.7653
H61.08762.08992.86893.90661.76531.7725
H71.08762.08992.86893.90661.76531.7725

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.985 N2 C1 H5 108.672
N2 C1 H6 110.760 N2 C1 H7 110.760
N2 C3 O4 172.694 H5 C1 H6 108.721
H5 C1 H7 108.721 H6 C1 H7 109.157
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability