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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-150.722432
Energy at 298.15K-150.730548
HF Energy-150.235780
Nuclear repulsion energy83.088927
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 MP3/6-31G*
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 3520 3304 1.45      
2 A1 3131 2939 36.77      
3 A1 1741 1634 51.96      
4 A1 1554 1458 0.18      
5 A1 1162 1091 37.74      
6 A1 923 866 0.02      
7 A1 469 440 7.52      
8 A2 3611 3390 0.00      
9 A2 1438 1349 0.00      
10 A2 1105 1037 0.00      
11 A2 292 274 0.00      
12 B1 3609 3387 0.31      
13 B1 3181 2986 27.54      
14 B1 1424 1337 0.33      
15 B1 875 821 0.86      
16 B1 416 390 115.62      
17 B2 3521 3305 0.00      
18 B2 1731 1625 2.06      
19 B2 1433 1345 23.84      
20 B2 1140 1070 61.21      
21 B2 867 814 437.46      

Unscaled Zero Point Vibrational Energy (zpe) 18570.8 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 17430.6 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 MP3/6-31G*
ABC
1.17213 0.30355 0.27443

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.557
N2 0.000 1.260 -0.185
N3 0.000 -1.260 -0.185
H4 0.880 0.000 1.206
H5 -0.880 0.000 1.206
H6 0.816 1.304 -0.793
H7 -0.816 1.304 -0.793
H8 -0.816 -1.304 -0.793
H9 0.816 -1.304 -0.793

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46201.46201.09371.09372.04632.04632.04632.0463
N21.46202.51932.07292.07291.01831.01832.75782.7578
N31.46202.51932.07292.07292.75782.75781.01831.0183
H41.09372.07292.07291.76062.38732.92782.92782.3873
H51.09372.07292.07291.76062.92782.38732.38732.9278
H62.04631.01832.75782.38732.92781.63163.07562.6071
H72.04631.01832.75782.92782.38731.63162.60713.0756
H82.04632.75781.01832.92782.38733.07562.60711.6316
H92.04632.75781.01832.38732.92782.60713.07561.6316

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.886 C1 N2 H7 109.886
C1 N3 H8 109.886 C1 N3 H9 109.886
N2 C1 N3 118.996 N2 C1 H4 107.529
N2 C1 H5 107.529 N3 C1 H4 107.529
N3 C1 H5 107.529 H4 C1 H5 107.202
H6 N2 H7 106.471 H8 N3 H9 106.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability