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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: MP2=FULL/cc-pVQZ

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/cc-pVQZ
 hartrees
Energy at 0K-207.800325
Energy at 298.15K 
HF Energy-206.882861
Nuclear repulsion energy104.245485
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/cc-pVQZ
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' 3209 3072 7.63 64.55 0.68 0.81
2 A' 3101 2968 41.43 189.12 0.01 0.02
3 A' 2395 2292 967.02 1.29 0.01 0.02
4 A' 1530 1465 4.63 5.02 0.37 0.54
5 A' 1495 1430 11.42 21.43 0.32 0.48
6 A' 1473 1410 33.27 17.52 0.23 0.37
7 A' 1174 1124 19.31 0.81 0.62 0.76
8 A' 893 855 24.40 15.48 0.15 0.27
9 A' 636 609 25.75 0.33 0.74 0.85
10 A' 174 166 19.31 1.90 0.68 0.81
11 A" 3186 3050 10.83 60.29 0.75 0.86
12 A" 1534 1468 7.27 8.20 0.75 0.86
13 A" 1152 1103 0.06 0.44 0.75 0.86
14 A" 591 566 16.76 0.41 0.75 0.86
15 A" 58 56 1.94 0.95 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11300.4 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 10815.7 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/cc-pVQZ
ABC
2.72073 0.14547 0.14173

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.326 1.121 0.000
N2 0.000 0.581 0.000
C3 -0.549 -0.487 0.000
O4 -1.208 -1.460 0.000
H5 1.263 2.200 0.000
H6 1.869 0.805 0.883
H7 1.869 0.805 -0.883

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43142.46933.61671.08121.08411.0841
N21.43141.20052.37172.05342.07942.0794
C32.46931.20051.17563.24052.88002.8800
O43.61672.37171.17564.41613.92163.9216
H51.08122.05343.24054.41611.75921.7592
H61.08412.07942.88003.92161.75921.7663
H71.08412.07942.88003.92161.75921.7663

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 139.357 N2 C1 H5 108.821
N2 C1 H6 110.754 N2 C1 H7 110.754
N2 C3 O4 173.081 H5 C1 H6 108.674
H5 C1 H7 108.674 H6 C1 H7 109.110
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability