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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-151.016573
Energy at 298.15K-151.024611
HF Energy-150.305573
Nuclear repulsion energy83.476636
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 CCSD(T)=FULL/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 3510 3362        
2 A1 3086 2956        
3 A1 1675 1605        
4 A1 1509 1446        
5 A1 1121 1074        
6 A1 878 841        
7 A1 460 441        
8 A2 3593 3442        
9 A2 1412 1353        
10 A2 1083 1037        
11 A2 265 254        
12 B1 3590 3439        
13 B1 3108 2978        
14 B1 1385 1327        
15 B1 854 818        
16 B1 396 379        
17 B2 3510 3363        
18 B2 1663 1593        
19 B2 1398 1339        
20 B2 1109 1062        
21 B2 824 789        

Unscaled Zero Point Vibrational Energy (zpe) 18213.3 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 17448.4 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 CCSD(T)=FULL/cc-pVTZ
ABC
1.18338 0.30613 0.27667

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/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 -0.184
N3 0.000 -1.255 -0.184
H4 0.874 0.000 1.201
H5 -0.874 0.000 1.201
H6 0.811 1.297 -0.789
H7 -0.811 1.297 -0.789
H8 -0.811 -1.297 -0.789
H9 0.811 -1.297 -0.789

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45661.45661.08681.08682.03612.03612.03612.0361
N21.45662.50962.06342.06341.01201.01202.74482.7448
N31.45662.50962.06342.06342.74482.74481.01201.0120
H41.08682.06342.06341.74872.37572.91202.91202.3757
H51.08682.06342.06341.74872.91202.37572.37572.9120
H62.03611.01202.74482.37572.91201.62143.05912.5940
H72.03611.01202.74482.91202.37571.62142.59403.0591
H82.03612.74481.01202.91202.37573.05912.59401.6214
H92.03612.74481.01202.37572.91202.59403.05911.6214

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.828 C1 N2 H7 109.828
C1 N3 H8 109.828 C1 N3 H9 109.828
N2 C1 N3 118.958 N2 C1 H4 107.555
N2 C1 H5 107.555 N3 C1 H4 107.555
N3 C1 H5 107.555 H4 C1 H5 107.131
H6 N2 H7 106.468 H8 N3 H9 106.468
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability