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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2=FULL/3-21G*

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/3-21G*
 hartrees
Energy at 0K-206.051307
Energy at 298.15K 
HF Energy-205.619412
Nuclear repulsion energy102.026053
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/3-21G*
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' 3187 3022 13.54 76.06 0.64 0.78
2 A' 3088 2928 34.26 120.37 0.01 0.02
3 A' 2357 2234 554.93 1.28 0.24 0.39
4 A' 1600 1517 7.43 22.91 0.75 0.86
5 A' 1531 1452 32.51 19.68 0.57 0.73
6 A' 1419 1345 23.67 29.29 0.28 0.44
7 A' 1189 1127 15.10 4.28 0.64 0.78
8 A' 819 777 29.28 15.73 0.24 0.38
9 A' 578 548 17.70 0.91 0.24 0.38
10 A' 188 178 17.37 1.55 0.75 0.86
11 A" 3153 2989 18.93 60.30 0.75 0.86
12 A" 1608 1525 6.67 27.78 0.75 0.86
13 A" 1178 1117 0.00 3.58 0.75 0.86
14 A" 515 488 16.57 0.39 0.75 0.86
15 A" 81 77 3.92 1.64 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11245.4 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 10660.6 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/3-21G*
ABC
2.80374 0.13793 0.13483

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.332 1.192 0.000
N2 0.000 0.573 0.000
C3 -0.536 -0.518 0.000
O4 -1.221 -1.516 0.000
H5 1.206 2.275 0.000
H6 1.894 0.897 0.892
H7 1.894 0.897 -0.892

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.46882.53223.72171.09051.09441.0944
N21.46881.21542.41972.08552.11812.1181
C32.53221.21541.21073.29112.94952.9495
O43.72172.41971.21074.50104.03974.0397
H51.09052.08553.29114.50101.77981.7798
H61.09442.11812.94954.03971.77981.7840
H71.09442.11812.94954.03971.77981.7840

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 141.075 N2 C1 H5 108.239
N2 C1 H6 110.599 N2 C1 H7 110.599
N2 C3 O4 171.695 H5 C1 H6 109.093
H5 C1 H7 109.093 H6 C1 H7 109.183
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability