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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: mPW1PW91/TZVP

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/TZVP
 hartrees
Energy at 0K-151.230784
Energy at 298.15K-151.238774
HF Energy-151.230784
Nuclear repulsion energy83.397498
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/TZVP
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 3537 3375 0.11      
2 A1 3079 2937 37.26      
3 A1 1678 1601 56.96      
4 A1 1486 1418 0.92      
5 A1 1098 1047 43.08      
6 A1 844 805 9.87      
7 A1 460 439 2.51      
8 A2 3628 3461 0.00      
9 A2 1408 1343 0.00      
10 A2 1079 1029 0.00      
11 A2 260 248 0.00      
12 B1 3626 3460 1.08      
13 B1 3122 2979 25.98      
14 B1 1374 1311 0.04      
15 B1 852 813 0.22      
16 B1 397 379 92.90      
17 B2 3538 3375 0.68      
18 B2 1667 1591 6.86      
19 B2 1403 1339 21.22      
20 B2 1096 1045 95.35      
21 B2 755 721 443.83      

Unscaled Zero Point Vibrational Energy (zpe) 18194.6 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 17357.6 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/TZVP
ABC
1.19945 0.30307 0.27543

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.546
N2 0.000 1.255 -0.184
N3 0.000 -1.255 -0.184
H4 0.875 0.000 1.198
H5 -0.875 0.000 1.198
H6 0.818 1.343 -0.773
H7 -0.818 1.343 -0.773
H8 -0.818 -1.343 -0.773
H9 0.818 -1.343 -0.773

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45191.45191.09131.09132.05192.05192.05192.0519
N21.45192.51032.06202.06201.01141.01142.78632.7863
N31.45192.51032.06202.06202.78632.78631.01141.0114
H41.09132.06202.06201.74922.38602.92462.92462.3860
H51.09132.06202.06201.74922.92462.38602.38602.9246
H62.05191.01142.78632.38602.92461.63513.14382.6851
H72.05191.01142.78632.92462.38601.63512.68513.1438
H82.05192.78631.01142.92462.38603.14382.68511.6351
H92.05192.78631.01142.38602.92462.68513.14381.6351

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.560 C1 N2 H7 111.560
C1 N3 H8 111.560 C1 N3 H9 111.560
N2 C1 N3 119.642 N2 C1 H4 107.499
N2 C1 H5 107.499 N3 C1 H4 107.499
N3 C1 H5 107.499 H4 C1 H5 106.527
H6 N2 H7 107.866 H8 N3 H9 107.866
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.193      
2 N -0.416      
3 N -0.416      
4 H 0.137      
5 H 0.137      
6 H 0.188      
7 H 0.188      
8 H 0.188      
9 H 0.188      


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 -1.960 1.960
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.667 0.000 0.000
y 0.000 -26.168 0.000
z 0.000 0.000 -18.396
Traceless
 xyz
x 5.615 0.000 0.000
y 0.000 -8.637 0.000
z 0.000 0.000 3.022
Polar
3z2-r26.043
x2-y29.501
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.276 0.000 0.000
y 0.000 4.778 0.000
z 0.000 0.000 4.292


<r2> (average value of r2) Å2
<r2> 53.742
(<r2>)1/2 7.331