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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBEPBE/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-151.083709
Energy at 298.15K-151.091581
HF Energy-151.083709
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.675100
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/aug-cc-pVTZ
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 3402 3380 3.07      
2 A1 2978 2959 30.54      
3 A1 1609 1599 38.99      
4 A1 1431 1422 0.35      
5 A1 1054 1047 29.76      
6 A1 801 796 3.39      
7 A1 442 439 1.52      
8 A2 3486 3464 0.00      
9 A2 1350 1341 0.00      
10 A2 1040 1034 0.00      
11 A2 247 245 0.00      
12 B1 3484 3461 1.14      
13 B1 3019 2999 21.12      
14 B1 1322 1313 0.63      
15 B1 818 813 0.05      
16 B1 374 372 73.52      
17 B2 3402 3380 2.65      
18 B2 1597 1587 4.90      
19 B2 1336 1327 14.74      
20 B2 1032 1025 78.89      
21 B2 739 734 394.24      

Unscaled Zero Point Vibrational Energy (zpe) 17480.7 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 17367.1 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/aug-cc-pVTZ
ABC
1.18483 0.29719 0.27033

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.270 -0.183
N3 0.000 -1.270 -0.183
H4 0.884 0.000 1.203
H5 -0.884 0.000 1.203
H6 0.822 1.344 -0.785
H7 -0.822 1.344 -0.785
H8 -0.822 -1.344 -0.785
H9 0.822 -1.344 -0.785

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46501.46501.09971.09972.06402.06402.06402.0640
N21.46502.53922.07672.07671.02161.02162.80542.8054
N31.46502.53922.07672.07672.80542.80541.02161.0216
H41.09972.07672.07671.76742.40062.94402.94402.4006
H51.09972.07672.07671.76742.94402.40062.40062.9440
H62.06401.02162.80542.40062.94401.64333.15102.6885
H72.06401.02162.80542.94402.40061.64332.68853.1510
H82.06402.80541.02162.94402.40063.15102.68851.6433
H92.06402.80541.02162.40062.94402.68853.15101.6433

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.950 C1 N2 H7 110.950
C1 N3 H8 110.950 C1 N3 H9 110.950
N2 C1 N3 120.138 N2 C1 H4 107.277
N2 C1 H5 107.277 N3 C1 H4 107.277
N3 C1 H5 107.277 H4 C1 H5 106.945
H6 N2 H7 107.085 H8 N3 H9 107.085
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.002      
2 N -0.372      
3 N -0.372      
4 H 0.261      
5 H 0.261      
6 H 0.055      
7 H 0.055      
8 H 0.055      
9 H 0.055      


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 -1.702 1.702
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.346 0.000 0.000
y 0.000 -26.504 0.000
z 0.000 0.000 -19.112
Traceless
 xyz
x 5.462 0.000 0.000
y 0.000 -8.275 0.000
z 0.000 0.000 2.814
Polar
3z2-r25.627
x2-y29.158
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.098 0.000 0.000
y 0.000 6.664 0.000
z 0.000 0.000 5.590


<r2> (average value of r2) Å2
<r2> 54.796
(<r2>)1/2 7.402