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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: MP2=FULL/STO-3G

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=FULL/STO-3G
 hartrees
Energy at 0K-148.499970
Energy at 298.15K-148.507927
HF Energy-148.343643
Counterpoise corrected energy-148.499970
CP Energy at 298.15K-148.507927
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy80.839858
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=FULL/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3581 3183 32.39      
2 A1 3405 3027 5.36      
3 A1 1919 1706 3.64      
4 A1 1678 1492 0.39      
5 A1 1309 1164 3.45      
6 A1 982 873 5.40      
7 A1 453 403 16.62      
8 A2 3770 3351 0.00      
9 A2 1542 1371 0.00      
10 A2 1207 1073 0.00      
11 A2 294 262 0.00      
12 B1 3770 3351 34.67      
13 B1 3524 3132 0.83      
14 B1 1548 1376 2.58      
15 B1 918 816 2.17      
16 B1 379 337 107.46      
17 B2 3582 3184 1.18      
18 B2 1919 1706 2.05      
19 B2 1511 1343 28.08      
20 B2 1215 1080 2.17      
21 B2 1059 942 159.56      

Unscaled Zero Point Vibrational Energy (zpe) 19782.8 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 17584.9 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=FULL/STO-3G
ABC
1.07700 0.29297 0.26148

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.596
N2 0.000 1.299 -0.189
N3 0.000 -1.299 -0.189
H4 0.901 0.000 1.243
H5 -0.901 0.000 1.243
H6 0.822 1.214 -0.853
H7 -0.822 1.214 -0.853
H8 -0.822 -1.214 -0.853
H9 0.822 -1.214 -0.853

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.51751.51751.10981.10982.06092.06092.06092.0609
N21.51752.59752.13332.13331.05991.05992.72562.7256
N31.51752.59752.13332.13332.72562.72561.05991.0599
H41.10982.13332.13331.80252.42342.97272.97272.4234
H51.10982.13332.13331.80252.97272.42342.42342.9727
H62.06091.05992.72562.42342.97271.64422.93212.4276
H72.06091.05992.72562.97272.42341.64422.42762.9321
H82.06092.72561.05992.97272.42342.93212.42761.6442
H92.06092.72561.05992.42342.97272.42762.93211.6442

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 104.788 C1 N2 H7 104.788
C1 N3 H8 104.788 C1 N3 H9 104.788
N2 C1 N3 117.702 N2 C1 H4 107.568
N2 C1 H5 107.568 N3 C1 H4 107.568
N3 C1 H5 107.568 H4 C1 H5 108.604
H6 N2 H7 101.734 H8 N3 H9 101.734
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability