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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-149.707035
Energy at 298.15K-149.715051
HF Energy-149.400651
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy81.760800
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 MP2/3-21G*
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 3425 3258 5.43      
2 A1 3119 2967 35.27      
3 A1 1767 1681 32.52      
4 A1 1571 1494 0.77      
5 A1 1101 1047 56.82      
6 A1 785 747 4.82      
7 A1 445 424 5.99      
8 A2 3530 3359 0.00      
9 A2 1447 1377 0.00      
10 A2 1104 1050 0.00      
11 A2 301 287 0.00      
12 B1 3530 3359 3.14      
13 B1 3173 3018 26.72      
14 B1 1405 1336 0.32      
15 B1 847 806 0.10      
16 B1 441 419 121.18      
17 B2 3426 3260 0.48      
18 B2 1754 1668 0.28      
19 B2 1435 1365 6.79      
20 B2 1049 998 12.01      
21 B2 700 666 561.87      

Unscaled Zero Point Vibrational Energy (zpe) 18177.7 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 17292.4 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 MP2/3-21G*
ABC
1.16338 0.28825 0.26265

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.560
N2 0.000 1.287 -0.191
N3 0.000 -1.287 -0.191
H4 0.885 0.000 1.200
H5 -0.885 0.000 1.200
H6 0.836 1.383 -0.774
H7 -0.836 1.383 -0.774
H8 -0.836 -1.383 -0.774
H9 0.836 -1.383 -0.774

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.49001.49001.09241.09242.09552.09552.09552.0955
N21.49002.57372.09162.09161.02361.02362.85762.8576
N31.49002.57372.09162.09162.85762.85761.02361.0236
H41.09242.09162.09161.77072.41092.96182.96182.4109
H51.09242.09162.09161.77072.96182.41092.41092.9618
H62.09551.02362.85762.41092.96181.67133.23152.7657
H72.09551.02362.85762.96182.41091.67132.76573.2315
H82.09552.85761.02362.96182.41093.23152.76571.6713
H92.09552.85761.02362.41092.96182.76573.23151.6713

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 111.607 C1 N2 H7 111.607
C1 N3 H8 111.607 C1 N3 H9 111.607
N2 C1 N3 119.463 N2 C1 H4 107.174
N2 C1 H5 107.174 N3 C1 H4 107.174
N3 C1 H5 107.174 H4 C1 H5 108.279
H6 N2 H7 109.447 H8 N3 H9 109.447
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability