return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-151.040234
Energy at 298.15K-151.048193
HF Energy-150.309156
Nuclear repulsion energy83.387706
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/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 3505 3378        
2 A1 3080 2968        
3 A1 1670 1609        
4 A1 1510 1456        
5 A1 1106 1066        
6 A1 865 833        
7 A1 456 439        
8 A2 3578 3449        
9 A2 1410 1358        
10 A2 1076 1037        
11 A2 243 234        
12 B1 3576 3447        
13 B1 3106 2993        
14 B1 1381 1331        
15 B1 851 821        
16 B1 364 351        
17 B2 3504 3377        
18 B2 1658 1598        
19 B2 1396 1346        
20 B2 1100 1060        
21 B2 803 774        

Unscaled Zero Point Vibrational Energy (zpe) 18119.3 cm-1
Scaled (by 0.9637) Zero Point Vibrational Energy (zpe) 17461.5 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/aug-cc-pVTZ
ABC
1.18187 0.30529 0.27617

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.556
N2 0.000 1.255 -0.185
N3 0.000 -1.255 -0.185
H4 0.878 0.000 1.200
H5 -0.878 0.000 1.200
H6 0.813 1.309 -0.786
H7 -0.813 1.309 -0.786
H8 -0.813 -1.309 -0.786
H9 0.813 -1.309 -0.786

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45701.45701.08911.08912.04312.04312.04312.0431
N21.45702.50952.06482.06481.01271.01272.75592.7559
N31.45702.50952.06482.06482.75592.75591.01271.0127
H41.08912.06482.06481.75552.37952.91852.91852.3795
H51.08912.06482.06481.75552.91852.37952.37952.9185
H62.04311.01272.75592.37952.91851.62683.08222.6179
H72.04311.01272.75592.91852.37951.62682.61793.0822
H82.04312.75591.01272.91852.37953.08222.61791.6268
H92.04312.75591.01272.37952.91852.61793.08221.6268

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.346 C1 N2 H7 110.346
C1 N3 H8 110.346 C1 N3 H9 110.346
N2 C1 N3 118.901 N2 C1 H4 107.510
N2 C1 H5 107.510 N3 C1 H4 107.510
N3 C1 H5 107.510 H4 C1 H5 107.411
H6 N2 H7 106.871 H8 N3 H9 106.871
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability