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/aug-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 mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-151.200986
Energy at 298.15K-151.208943
HF Energy-151.200986
Nuclear repulsion energy83.213821
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/aug-cc-pVDZ
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 3525 3378 1.15      
2 A1 3081 2953 34.84      
3 A1 1653 1584 42.60      
4 A1 1470 1409 0.72      
5 A1 1098 1052 33.59      
6 A1 845 810 5.95      
7 A1 454 435 1.76      
8 A2 3616 3465 0.00      
9 A2 1392 1334 0.00      
10 A2 1071 1026 0.00      
11 A2 249 239 0.00      
12 B1 3614 3463 2.27      
13 B1 3130 2999 24.36      
14 B1 1361 1304 0.33      
15 B1 848 813 0.07      
16 B1 380 364 80.25      
17 B2 3525 3378 3.27      
18 B2 1646 1577 9.25      
19 B2 1378 1320 17.89      
20 B2 1108 1062 96.66      
21 B2 763 731 368.50      

Unscaled Zero Point Vibrational Energy (zpe) 18102.9 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 17348.0 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/aug-cc-pVDZ
ABC
1.18827 0.30286 0.27483

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.549
N2 0.000 1.257 -0.184
N3 0.000 -1.257 -0.184
H4 0.881 0.000 1.203
H5 -0.881 0.000 1.203
H6 0.817 1.333 -0.782
H7 -0.817 1.333 -0.782
H8 -0.817 -1.333 -0.782
H9 0.817 -1.333 -0.782

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45481.45481.09751.09752.05312.05312.05312.0531
N21.45482.51392.06862.06861.01561.01562.78062.7806
N31.45482.51392.06862.06862.78062.78061.01561.0156
H41.09752.06862.06861.76232.39212.93282.93282.3921
H51.09752.06862.06861.76232.93282.39212.39212.9328
H62.05311.01562.78062.39212.93281.63363.12612.6654
H72.05311.01562.78062.93282.39211.63362.66543.1261
H82.05312.78061.01562.93282.39213.12612.66541.6336
H92.05312.78061.01562.39212.93282.66543.12611.6336

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.179 C1 N2 H7 111.179
C1 N3 H8 111.179 C1 N3 H9 111.179
N2 C1 N3 119.541 N2 C1 H4 107.466
N2 C1 H5 107.466 N3 C1 H4 107.466
N3 C1 H5 107.466 H4 C1 H5 106.810
H6 N2 H7 107.080 H8 N3 H9 107.080
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.831      
2 N -0.176      
3 N -0.176      
4 H -0.166      
5 H -0.166      
6 H -0.037      
7 H -0.037      
8 H -0.037      
9 H -0.037      


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 -1.757 1.757
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.017 0.000 0.000
y 0.000 -26.338 0.000
z 0.000 0.000 -18.668
Traceless
 xyz
x 5.486 0.000 0.000
y 0.000 -8.496 0.000
z 0.000 0.000 3.010
Polar
3z2-r26.020
x2-y29.322
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.747 0.000 0.000
y 0.000 5.940 0.000
z 0.000 0.000 5.127


<r2> (average value of r2) Å2
<r2> 53.979
(<r2>)1/2 7.347