return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: B2PLYP/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 B2PLYP/6-31G
 hartrees
Energy at 0K-207.643653
Energy at 298.15K 
HF Energy-207.493366
Nuclear repulsion energy102.197163
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 B2PLYP/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' 3179 3179 14.77 88.38 0.64 0.78
2 A' 3072 3072 44.84 166.23 0.02 0.03
3 A' 2340 2340 726.82 4.29 0.18 0.31
4 A' 1558 1558 7.26 22.31 0.75 0.86
5 A' 1524 1524 29.44 20.82 0.56 0.72
6 A' 1435 1435 6.44 32.35 0.29 0.44
7 A' 1190 1190 12.33 3.52 0.67 0.80
8 A' 831 831 33.34 10.43 0.24 0.39
9 A' 537 537 24.34 0.88 0.27 0.42
10 A' 171 171 16.03 2.01 0.75 0.86
11 A" 3145 3145 21.54 75.12 0.75 0.86
12 A" 1566 1566 8.47 25.94 0.75 0.86
13 A" 1173 1173 0.05 2.92 0.75 0.86
14 A" 491 491 23.51 0.61 0.75 0.86
15 A" 71 71 5.58 2.19 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11141.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11141.3 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 B2PLYP/6-31G
ABC
3.34247 0.13564 0.13366

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.188 1.351 0.000
N2 0.000 0.528 0.000
C3 -0.476 -0.583 0.000
O4 -1.093 -1.628 0.000
H5 0.888 2.399 0.000
H6 1.794 1.159 0.891
H7 1.794 1.159 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44492.55113.75241.09031.09431.0943
N21.44491.20892.41802.07102.09952.0995
C32.55111.20891.21423.27922.99632.9963
O43.75242.41801.21424.48854.11054.1105
H51.09032.07103.27924.48851.77541.7754
H61.09432.09952.99634.11051.77541.7815
H71.09432.09952.99634.11051.77541.7815

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 147.895 N2 C1 H5 108.747
N2 C1 H6 110.801 N2 C1 H7 110.801
N2 C3 O4 172.617 H5 C1 H6 108.728
H5 C1 H7 108.728 H6 C1 H7 108.984
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.237      
2 N -0.361      
3 C 0.435      
4 O -0.378      
5 H 0.186      
6 H 0.178      
7 H 0.178      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.815 2.505 0.000 3.768
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.651 -0.579 -0.013
y -0.579 -25.415 -0.008
z -0.013 -0.008 -22.674
Traceless
 xyz
x 1.393 -0.579 -0.013
y -0.579 -2.752 -0.008
z -0.013 -0.008 1.359
Polar
3z2-r22.718
x2-y22.764
xy-0.579
xz-0.013
yz-0.008


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.806 1.998 0.002
y 1.998 6.020 0.000
z 0.002 0.000 2.534


<r2> (average value of r2) Å2
<r2> 87.523
(<r2>)1/2 9.355