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: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-151.190546
Energy at 298.15K-151.198527
HF Energy-151.190546
Nuclear repulsion energy83.261364
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 mPW1PW91/6-31+G**
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 3555 3384 0.15      
2 A1 3092 2943 35.98      
3 A1 1682 1601 69.40      
4 A1 1494 1422 0.64      
5 A1 1096 1043 42.20      
6 A1 841 800 14.17      
7 A1 463 441 1.70      
8 A2 3656 3479 0.00      
9 A2 1404 1336 0.00      
10 A2 1072 1021 0.00      
11 A2 264 251 0.00      
12 B1 3654 3478 4.80      
13 B1 3143 2992 26.40      
14 B1 1372 1306 0.00      
15 B1 849 808 0.15      
16 B1 399 379 100.90      
17 B2 3556 3384 1.08      
18 B2 1672 1592 6.84      
19 B2 1399 1331 22.30      
20 B2 1105 1052 119.98      
21 B2 747 711 450.25      

Unscaled Zero Point Vibrational Energy (zpe) 18256.5 cm-1
Scaled (by 0.9518) 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 mPW1PW91/6-31+G**
ABC
1.19745 0.30185 0.27456

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.546
N2 0.000 1.257 -0.184
N3 0.000 -1.257 -0.184
H4 0.878 0.000 1.198
H5 -0.878 0.000 1.198
H6 0.820 1.350 -0.772
H7 -0.820 1.350 -0.772
H8 -0.820 -1.350 -0.772
H9 0.820 -1.350 -0.772

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45351.45351.09341.09342.05752.05752.05752.0575
N21.45352.51352.06402.06401.01331.01332.79542.7954
N31.45352.51352.06402.06402.79542.79541.01331.0133
H41.09342.06402.06401.75572.38902.93032.93032.3890
H51.09342.06402.06401.75572.93032.38902.38902.9303
H62.05751.01332.79542.38902.93031.64003.15942.7004
H72.05751.01332.79542.93032.38901.64002.70043.1594
H82.05752.79541.01332.93032.38903.15942.70041.6400
H92.05752.79541.01332.38902.93032.70043.15941.6400

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.794 C1 N2 H7 111.794
C1 N3 H8 111.794 C1 N3 H9 111.794
N2 C1 N3 119.679 N2 C1 H4 107.428
N2 C1 H5 107.428 N3 C1 H4 107.428
N3 C1 H5 107.428 H4 C1 H5 106.816
H6 N2 H7 108.039 H8 N3 H9 108.039
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.256      
2 N -0.624      
3 N -0.624      
4 H 0.164      
5 H 0.164      
6 H 0.294      
7 H 0.294      
8 H 0.294      
9 H 0.294      


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 -1.990 1.990
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.729 0.000 0.000
y 0.000 -26.799 0.000
z 0.000 0.000 -18.639
Traceless
 xyz
x 5.990 0.000 0.000
y 0.000 -9.115 0.000
z 0.000 0.000 3.125
Polar
3z2-r26.250
x2-y210.070
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.220 0.000 0.000
y 0.000 5.364 0.000
z 0.000 0.000 4.513


<r2> (average value of r2) Å2
<r2> 54.097
(<r2>)1/2 7.355