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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCD/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 CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-150.956787
Energy at 298.15K-150.964785
HF Energy-150.309315
Counterpoise corrected energy-150.956787
CP Energy at 298.15K-150.964785
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy83.342667
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 CCD/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 3533 3381 0.21      
2 A1 3090 2958 29.48      
3 A1 1686 1614 44.14      
4 A1 1521 1455 0.12      
5 A1 1115 1067 37.93      
6 A1 870 833 2.45      
7 A1 461 441 2.62      
8 A2 3621 3465 0.00      
9 A2 1421 1359 0.00      
10 A2 1086 1039 0.00      
11 A2 254 243 0.00      
12 B1 3619 3463 4.16      
13 B1 3137 3002 21.09      
14 B1 1391 1331 0.32      
15 B1 859 822 0.83      
16 B1 371 355 83.52      
17 B2 3534 3382 3.97      
18 B2 1676 1604 7.53      
19 B2 1412 1351 20.00      
20 B2 1118 1070 80.06      
21 B2 810 775 353.11      

Unscaled Zero Point Vibrational Energy (zpe) 18290.9 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 17504.4 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 CCD/aug-cc-pVTZ
ABC
1.18219 0.30460 0.27559

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.555
N2 0.000 1.255 -0.186
N3 0.000 -1.255 -0.186
H4 0.877 0.000 1.202
H5 -0.877 0.000 1.202
H6 0.813 1.317 -0.784
H7 -0.813 1.317 -0.784
H8 -0.813 -1.317 -0.784
H9 0.813 -1.317 -0.784

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45761.45761.08961.08962.04712.04712.04712.0471
N21.45762.51052.06632.06631.01161.01162.76372.7637
N31.45762.51052.06632.06632.76372.76371.01161.0116
H41.08962.06632.06631.75442.38382.92162.92162.3838
H51.08962.06632.06631.75442.92162.38382.38382.9216
H62.04711.01162.76372.38382.92161.62663.09652.6349
H72.04711.01162.76372.92162.38381.62662.63493.0965
H82.04712.76371.01162.92162.38383.09652.63491.6266
H92.04712.76371.01162.38382.92162.63493.09651.6266

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.707 C1 N2 H7 110.707
C1 N3 H8 110.707 C1 N3 H9 110.707
N2 C1 N3 118.897 N2 C1 H4 107.549
N2 C1 H5 107.549 N3 C1 H4 107.549
N3 C1 H5 107.549 H4 C1 H5 107.235
H6 N2 H7 107.018 H8 N3 H9 107.018
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability