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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CISD/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 CISD/6-31G
 hartrees
Energy at 0K-207.055945
Energy at 298.15K 
HF Energy-206.677954
Nuclear repulsion energy102.530959
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 CISD/6-31G
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' 3208 3008 15.63      
2 A' 3109 2916 39.20      
3 A' 2402 2253 1083.47      
4 A' 1585 1486 6.51      
5 A' 1555 1458 38.67      
6 A' 1488 1396 4.33      
7 A' 1211 1136 15.72      
8 A' 849 796 45.71      
9 A' 559 524 43.74      
10 A' 150 141 19.53      
11 A" 3181 2983 21.10      
12 A" 1591 1492 7.89      
13 A" 1203 1129 0.82      
14 A" 518 486 41.00      
15 A" 69 65 7.58      

Unscaled Zero Point Vibrational Energy (zpe) 11339.4 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 10634.1 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 CISD/6-31G
ABC
3.70764 0.13497 0.13353

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.087 1.446 0.000
N2 0.000 0.494 0.000
C3 -0.438 -0.618 0.000
O4 -0.997 -1.689 0.000
H5 0.669 2.453 0.000
H6 1.707 1.318 0.892
H7 1.707 1.318 -0.892

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44502.56583.76431.09031.09381.0938
N21.44501.19452.39962.07092.09472.0947
C32.56581.19451.20843.26453.02353.0235
O43.76432.39961.20844.46494.14084.1408
H51.09032.07093.26454.46491.77811.7781
H61.09382.09473.02354.14081.77811.7832
H71.09382.09473.02354.14081.77811.7832

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 152.748 N2 C1 H5 108.730
N2 C1 H6 110.434 N2 C1 H7 110.434
N2 C3 O4 173.965 H5 C1 H6 109.001
H5 C1 H7 109.001 H6 C1 H7 109.209
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability