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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G
 hartrees
Energy at 0K-207.108664
Energy at 298.15K 
HF Energy-206.671596
Nuclear repulsion energy101.501727
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=FULL/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' 3190 3031 12.92 81.28 0.66 0.79
2 A' 3075 2922 42.04 147.66 0.01 0.02
3 A' 2309 2194 688.77 2.58 0.25 0.40
4 A' 1571 1493 7.47 21.18 0.75 0.86
5 A' 1529 1453 30.47 18.89 0.55 0.71
6 A' 1415 1345 11.10 31.95 0.28 0.43
7 A' 1191 1131 18.47 4.71 0.62 0.76
8 A' 826 785 27.84 19.08 0.24 0.38
9 A' 545 518 22.02 1.41 0.23 0.37
10 A' 202 192 17.98 2.21 0.75 0.86
11 A" 3157 2999 19.97 66.33 0.75 0.86
12 A" 1575 1496 7.22 25.55 0.75 0.86
13 A" 1179 1121 0.20 3.60 0.75 0.86
14 A" 465 442 18.41 0.50 0.75 0.86
15 A" 94 89 4.81 2.54 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11162.3 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 10605.3 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 MP2=FULL/6-31G
ABC
3.00654 0.13533 0.13280

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.278 1.269 0.000
N2 0.000 0.561 0.000
C3 -0.503 -0.556 0.000
O4 -1.180 -1.573 0.000
H5 1.070 2.342 0.000
H6 1.860 1.016 0.895
H7 1.860 1.016 -0.895

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.46142.55033.75771.09291.09701.0970
N21.46141.22482.43832.07802.11402.1140
C32.55031.22481.22173.29752.97632.9763
O43.75772.43831.22174.51564.09244.0924
H51.09292.07803.29754.51561.78411.7841
H61.09702.11402.97634.09241.78411.7895
H71.09702.11402.97634.09241.78411.7895

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 143.248 N2 C1 H5 108.021
N2 C1 H6 110.634 N2 C1 H7 110.634
N2 C3 O4 170.610 H5 C1 H6 109.111
H5 C1 H7 109.111 H6 C1 H7 109.293
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability