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 CH2NCH3 (N-methylmethanimine)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-133.148728
Energy at 298.15K-133.154257
HF Energy-133.148728
Nuclear repulsion energy71.471287
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 B3PW91/3-21G
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' 3155 3032 37.18      
2 A' 3100 2980 18.12      
3 A' 2997 2881 61.32      
4 A' 2988 2872 35.31      
5 A' 1711 1645 16.11      
6 A' 1558 1497 27.35      
7 A' 1524 1465 1.19      
8 A' 1462 1406 4.30      
9 A' 1238 1190 5.29      
10 A' 1136 1092 1.83      
11 A' 910 875 11.23      
12 A' 466 448 7.62      
13 A" 3127 3006 13.85      
14 A" 1541 1481 6.86      
15 A" 1150 1105 0.64      
16 A" 1081 1039 31.23      
17 A" 707 679 1.72      
18 A" 233 224 10.18      

Unscaled Zero Point Vibrational Energy (zpe) 15040.3 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 14456.7 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 B3PW91/3-21G
ABC
1.75776 0.34661 0.30609

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.090 -0.437 0.000
N2 0.000 0.559 0.000
C3 1.200 0.133 0.000
H4 -0.740 -1.483 0.000
H5 -1.713 -0.264 0.884
H6 -1.713 -0.264 -0.884
H7 1.482 -0.931 0.000
H8 2.022 0.848 0.000

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6 H7 H8
C11.47692.36011.10311.09541.09542.61883.3670
N21.47691.27372.17242.09592.09592.10162.0425
C32.36011.27372.52493.06993.06991.10051.0895
H41.10312.17242.52491.79341.79342.28913.6142
H51.09542.09593.06991.79341.76873.38123.9957
H61.09542.09593.06991.79341.76873.38123.9957
H72.61882.10161.10052.28913.38123.38121.8594
H83.36702.04251.08953.61423.99573.99571.8594

picture of N-methylmethanimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 118.005 N2 C1 H4 113.921
N2 C1 H5 108.216 N2 C1 H6 108.216
N2 C3 H7 124.385 N2 C3 H8 119.401
H4 C1 H5 109.316 H4 C1 H6 109.316
H5 C1 H6 107.670 H7 C3 H8 116.214
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.492      
2 N -0.411      
3 C -0.162      
4 H 0.188      
5 H 0.241      
6 H 0.241      
7 H 0.175      
8 H 0.219      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.179 -1.587 0.000 1.597
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.957 0.884 0.000
y 0.884 -20.757 0.000
z 0.000 0.000 -19.611
Traceless
 xyz
x 4.227 0.884 0.000
y 0.884 -2.973 0.000
z 0.000 0.000 -1.254
Polar
3z2-r2-2.507
x2-y24.800
xy0.884
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.723 0.128 0.000
y 0.128 3.630 0.000
z 0.000 0.000 2.363


<r2> (average value of r2) Å2
<r2> 49.128
(<r2>)1/2 7.009