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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: mPW1PW91/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 mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-151.238557
Energy at 298.15K-151.246514
HF Energy-151.238557
Nuclear repulsion energy83.455768
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-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 3534 3386 0.64      
2 A1 3070 2942 32.66      
3 A1 1667 1597 43.90      
4 A1 1490 1427 0.46      
5 A1 1096 1050 36.46      
6 A1 840 805 6.29      
7 A1 458 439 1.45      
8 A2 3620 3468 0.00      
9 A2 1402 1344 0.00      
10 A2 1073 1028 0.00      
11 A2 250 240 0.00      
12 B1 3618 3466 3.82      
13 B1 3112 2982 22.43      
14 B1 1370 1312 0.27      
15 B1 847 811 0.08      
16 B1 377 361 78.90      
17 B2 3534 3386 3.40      
18 B2 1657 1587 8.54      
19 B2 1392 1334 17.14      
20 B2 1094 1049 92.37      
21 B2 764 732 381.94      

Unscaled Zero Point Vibrational Energy (zpe) 18132.3 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 17372.6 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/aug-cc-pVTZ
ABC
1.19789 0.30393 0.27594

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.547
N2 0.000 1.254 -0.184
N3 0.000 -1.254 -0.184
H4 0.875 0.000 1.198
H5 -0.875 0.000 1.198
H6 0.815 1.336 -0.776
H7 -0.815 1.336 -0.776
H8 -0.815 -1.336 -0.776
H9 0.815 -1.336 -0.776

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45171.45171.09051.09052.04932.04932.04932.0493
N21.45172.50822.06112.06111.01081.01082.77902.7790
N31.45172.50822.06112.06112.77902.77901.01081.0108
H41.09052.06112.06111.75032.38412.92192.92192.3841
H51.09052.06112.06111.75032.92192.38412.38412.9219
H62.04931.01082.77902.38412.92191.63053.13002.6718
H72.04931.01082.77902.92192.38411.63052.67183.1300
H82.04932.77901.01082.92192.38413.13002.67181.6305
H92.04932.77901.01082.38412.92192.67183.13001.6305

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.398 C1 N2 H7 111.398
C1 N3 H8 111.398 C1 N3 H9 111.398
N2 C1 N3 119.512 N2 C1 H4 107.490
N2 C1 H5 107.490 N3 C1 H4 107.490
N3 C1 H5 107.490 H4 C1 H5 106.737
H6 N2 H7 107.527 H8 N3 H9 107.527
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.184      
2 N -0.449      
3 N -0.449      
4 H 0.247      
5 H 0.247      
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 -1.746 1.746
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.918 0.000 0.000
y 0.000 -26.109 0.000
z 0.000 0.000 -18.655
Traceless
 xyz
x 5.464 0.000 0.000
y 0.000 -8.322 0.000
z 0.000 0.000 2.858
Polar
3z2-r25.717
x2-y29.191
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.741 0.000 0.000
y 0.000 5.934 0.000
z 0.000 0.000 5.121


<r2> (average value of r2) Å2
<r2> 53.738
(<r2>)1/2 7.331