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: PBEPBEultrafine/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBEultrafine/cc-pVDZ
 hartrees
Energy at 0K-151.020067
Energy at 298.15K-151.028058
HF Energy-151.020067
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.485031
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 PBEPBEultrafine/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3350 3330 8.49      
2 A1 2970 2952 42.77      
3 A1 1601 1592 24.75      
4 A1 1406 1398 0.12      
5 A1 1087 1081 21.75      
6 A1 851 846 0.02      
7 A1 441 438 6.08      
8 A2 3433 3413 0.00      
9 A2 1347 1339 0.00      
10 A2 1052 1046 0.00      
11 A2 277 276 0.00      
12 B1 3430 3411 2.90      
13 B1 3017 3000 26.56      
14 B1 1328 1320 1.93      
15 B1 825 820 0.11      
16 B1 411 409 78.77      
17 B2 3350 3331 0.36      
18 B2 1592 1583 0.40      
19 B2 1327 1320 24.55      
20 B2 1062 1055 56.22      
21 B2 799 794 384.68      

Unscaled Zero Point Vibrational Energy (zpe) 17478.0 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 17376.6 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 PBEPBEultrafine/cc-pVDZ
ABC
1.16900 0.29846 0.27049

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.551
N2 0.000 1.273 -0.178
N3 0.000 -1.273 -0.178
H4 0.890 0.000 1.215
H5 -0.890 0.000 1.215
H6 0.817 1.298 -0.809
H7 -0.817 1.298 -0.809
H8 -0.817 -1.298 -0.809
H9 0.817 -1.298 -0.809

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46711.46711.11111.11112.04982.04982.04982.0498
N21.46712.54632.08712.08711.03241.03242.77102.7710
N31.46712.54632.08712.08712.77102.77101.03241.0324
H41.11112.08712.08711.78082.40582.94942.94942.4058
H51.11112.08712.08711.78082.94942.40582.40582.9494
H62.04981.03242.77102.40582.94941.63463.06852.5969
H72.04981.03242.77102.94942.40581.63462.59693.0685
H82.04982.77101.03242.94942.40583.06852.59691.6346
H92.04982.77101.03242.40582.94942.59693.06851.6346

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 108.944 C1 N2 H7 108.944
C1 N3 H8 108.944 C1 N3 H9 108.944
N2 C1 N3 120.405 N2 C1 H4 107.293
N2 C1 H5 107.293 N3 C1 H4 107.293
N3 C1 H5 107.293 H4 C1 H5 106.521
H6 N2 H7 104.675 H8 N3 H9 104.675
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.001      
2 N -0.168      
3 N -0.168      
4 H 0.042      
5 H 0.042      
6 H 0.063      
7 H 0.063      
8 H 0.063      
9 H 0.063      


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 -1.848 1.848
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.180 0.000 0.000
y 0.000 -25.355 0.000
z 0.000 0.000 -18.068
Traceless
 xyz
x 4.532 0.000 0.000
y 0.000 -7.731 0.000
z 0.000 0.000 3.200
Polar
3z2-r26.399
x2-y28.176
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.203 0.000 0.000
y 0.000 4.424 0.000
z 0.000 0.000 4.162


<r2> (average value of r2) Å2
<r2> 54.146
(<r2>)1/2 7.358