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 NH2CH2NH2 (diaminomethane)

using model chemistry: PBEPBE/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/6-311G**
 hartrees
Energy at 0K-151.061178
Energy at 298.15K-151.069136
HF Energy-151.061178
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.587562
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 PBEPBE/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3392 3361 5.62      
2 A1 2980 2953 41.00      
3 A1 1618 1603 42.42      
4 A1 1434 1421 0.55      
5 A1 1074 1064 29.60      
6 A1 831 824 0.97      
7 A1 442 438 4.87      
8 A2 3477 3445 0.00      
9 A2 1356 1344 0.00      
10 A2 1051 1042 0.00      
11 A2 267 264 0.00      
12 B1 3475 3443 1.31      
13 B1 3021 2993 28.49      
14 B1 1333 1321 1.32      
15 B1 826 819 0.28      
16 B1 410 406 86.40      
17 B2 3393 3362 0.02      
18 B2 1608 1593 1.23      
19 B2 1341 1329 16.77      
20 B2 1041 1031 58.77      
21 B2 762 755 452.73      

Unscaled Zero Point Vibrational Energy (zpe) 17565.0 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 17405.2 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 PBEPBE/6-311G**
ABC
1.17910 0.29721 0.26996

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.550
N2 0.000 1.273 -0.181
N3 0.000 -1.273 -0.181
H4 0.884 0.000 1.208
H5 -0.884 0.000 1.208
H6 0.820 1.325 -0.793
H7 -0.820 1.325 -0.793
H8 -0.820 -1.325 -0.793
H9 0.820 -1.325 -0.793

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46771.46771.10191.10192.05692.05692.05692.0569
N21.46772.54522.08102.08101.02431.02432.79182.7918
N31.46772.54522.08102.08102.79182.79181.02431.0243
H41.10192.08102.08101.76792.40052.94312.94312.4005
H51.10192.08102.08101.76792.94312.40052.40052.9431
H62.05691.02432.79182.40052.94311.64013.11642.6499
H72.05691.02432.79182.94312.40051.64012.64993.1164
H82.05692.79181.02432.94312.40053.11642.64991.6401
H92.05692.79181.02432.40052.94312.64993.11641.6401

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.982 C1 N2 H7 109.982
C1 N3 H8 109.982 C1 N3 H9 109.982
N2 C1 N3 120.243 N2 C1 H4 107.305
N2 C1 H5 107.305 N3 C1 H4 107.305
N3 C1 H5 107.305 H4 C1 H5 106.673
H6 N2 H7 106.369 H8 N3 H9 106.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.106      
2 N -0.434      
3 N -0.434      
4 H 0.137      
5 H 0.137      
6 H 0.175      
7 H 0.175      
8 H 0.175      
9 H 0.175      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.876 1.876
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.053 0.000 0.000
y 0.000 -25.980 0.000
z 0.000 0.000 -18.368
Traceless
 xyz
x 5.121 0.000 0.000
y 0.000 -8.269 0.000
z 0.000 0.000 3.149
Polar
3z2-r26.297
x2-y28.927
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.374 0.000 0.000
y 0.000 4.835 0.000
z 0.000 0.000 4.324


<r2> (average value of r2) Å2
<r2> 54.438
(<r2>)1/2 7.378