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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-151.083707
Energy at 298.15K-151.091582
HF Energy-151.083707
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.676053
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 PBEPBEultrafine/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 3364 3.07      
2 A1 2977 2943 30.57      
3 A1 1609 1591 38.92      
4 A1 1431 1415 0.36      
5 A1 1054 1042 29.78      
6 A1 800 791 3.48      
7 A1 439 434 1.48      
8 A2 3487 3448 0.00      
9 A2 1349 1334 0.00      
10 A2 1040 1028 0.00      
11 A2 252 249 0.00      
12 B1 3484 3445 1.14      
13 B1 3017 2983 21.10      
14 B1 1321 1306 0.62      
15 B1 818 808 0.05      
16 B1 372 368 73.53      
17 B2 3402 3364 2.67      
18 B2 1596 1578 4.98      
19 B2 1335 1320 14.70      
20 B2 1031 1020 79.42      
21 B2 740 732 393.75      

Unscaled Zero Point Vibrational Energy (zpe) 17477.6 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 17281.8 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
1.18482 0.29720 0.27034

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/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
N21.46502.53912.07662.07661.02161.02162.80542.8054
N31.46502.53912.07662.07662.80542.80541.02161.0216
H41.09972.07662.07661.76752.40062.94412.94412.4006
H51.09972.07662.07661.76752.94412.40062.40062.9441
H62.06401.02162.80542.40062.94411.64333.15102.6885
H72.06401.02162.80542.94412.40061.64332.68853.1510
H82.06402.80541.02162.94412.40063.15102.68851.6433
H92.06402.80541.02162.40062.94412.68853.15101.6433

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.954 C1 N2 H7 110.954
C1 N3 H8 110.954 C1 N3 H9 110.954
N2 C1 N3 120.136 N2 C1 H4 107.276
N2 C1 H5 107.276 N3 C1 H4 107.276
N3 C1 H5 107.276 H4 C1 H5 106.948
H6 N2 H7 107.083 H8 N3 H9 107.083
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/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 2.813
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 6.665 0.000
z 0.000 0.000 5.592


<r2> (average value of r2) Å2
<r2> 54.795
(<r2>)1/2 7.402