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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBE1PBE/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 PBE1PBE/aug-cc-pVDZ
 hartrees
Energy at 0K-151.059984
Energy at 298.15K-151.067942
HF Energy-151.059984
Nuclear repulsion energy83.211811
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 PBE1PBE/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 3521 3385 1.10      
2 A1 3076 2958 33.83      
3 A1 1648 1585 42.96      
4 A1 1463 1407 0.76      
5 A1 1100 1057 32.82      
6 A1 846 814 5.95      
7 A1 454 437 1.72      
8 A2 3613 3474 0.00      
9 A2 1387 1334 0.00      
10 A2 1068 1027 0.00      
11 A2 250 240 0.00      
12 B1 3611 3472 2.55      
13 B1 3125 3005 23.46      
14 B1 1358 1306 0.38      
15 B1 847 814 0.07      
16 B1 381 366 80.22      
17 B2 3521 3386 3.43      
18 B2 1640 1577 9.37      
19 B2 1372 1319 18.14      
20 B2 1113 1070 96.95      
21 B2 763 733 367.48      

Unscaled Zero Point Vibrational Energy (zpe) 18077.7 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 17383.6 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 PBE1PBE/aug-cc-pVDZ
ABC
1.18772 0.30306 0.27502

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.548
N2 0.000 1.257 -0.183
N3 0.000 -1.257 -0.183
H4 0.882 0.000 1.204
H5 -0.882 0.000 1.204
H6 0.817 1.331 -0.783
H7 -0.817 1.331 -0.783
H8 -0.817 -1.331 -0.783
H9 0.817 -1.331 -0.783

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45411.45411.09891.09892.05242.05242.05242.0524
N21.45412.51322.06912.06911.01661.01662.77912.7791
N31.45412.51322.06912.06912.77912.77911.01661.0166
H41.09892.06912.06911.76402.39252.93382.93382.3925
H51.09892.06912.06911.76402.93382.39252.39252.9338
H62.05241.01662.77912.39252.93381.63463.12372.6619
H72.05241.01662.77912.93382.39251.63462.66193.1237
H82.05242.77911.01662.93382.39253.12372.66191.6346
H92.05242.77911.01662.39252.93382.66193.12371.6346

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.109 C1 N2 H7 111.109
C1 N3 H8 111.109 C1 N3 H9 111.109
N2 C1 N3 119.579 N2 C1 H4 107.466
N2 C1 H5 107.466 N3 C1 H4 107.466
N3 C1 H5 107.466 H4 C1 H5 106.761
H6 N2 H7 107.024 H8 N3 H9 107.024
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.883      
2 N -0.188      
3 N -0.188      
4 H -0.172      
5 H -0.172      
6 H -0.040      
7 H -0.040      
8 H -0.040      
9 H -0.040      


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 -1.764 1.764
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.074 0.000 0.000
y 0.000 -26.393 0.000
z 0.000 0.000 -18.734
Traceless
 xyz
x 5.490 0.000 0.000
y 0.000 -8.490 0.000
z 0.000 0.000 3.000
Polar
3z2-r25.999
x2-y29.320
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.782 0.000 0.000
y 0.000 5.984 0.000
z 0.000 0.000 5.170


<r2> (average value of r2) Å2
<r2> 53.997
(<r2>)1/2 7.348