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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-150.828187
Energy at 298.15K-150.836166
HF Energy-150.271858
Nuclear repulsion energy82.655774
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/aug-cc-pVDZ
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 3488 3360 1.78      
2 A1 3072 2960 33.55      
3 A1 1664 1603 39.57      
4 A1 1489 1435 0.07      
5 A1 1106 1065 33.35      
6 A1 866 834 1.21      
7 A1 452 436 3.04      
8 A2 3577 3446 0.00      
9 A2 1398 1347 0.00      
10 A2 1074 1035 0.00      
11 A2 251 242 0.00      
12 B1 3576 3445 0.60      
13 B1 3119 3005 26.13      
14 B1 1373 1323 0.51      
15 B1 852 821 1.00      
16 B1 375 361 82.91      
17 B2 3488 3360 3.23      
18 B2 1656 1596 6.41      
19 B2 1390 1339 22.43      
20 B2 1107 1067 78.68      
21 B2 810 780 339.02      

Unscaled Zero Point Vibrational Energy (zpe) 18090.8 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 17428.7 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/aug-cc-pVDZ
ABC
1.16356 0.29979 0.27129

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.558
N2 0.000 1.266 -0.186
N3 0.000 -1.266 -0.186
H4 0.888 0.000 1.212
H5 -0.888 0.000 1.212
H6 0.819 1.321 -0.794
H7 -0.819 1.321 -0.794
H8 -0.819 -1.321 -0.794
H9 0.819 -1.321 -0.794

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46871.46871.10261.10262.05992.05992.05992.0599
N21.46872.53272.08462.08461.02141.02142.78072.7807
N31.46872.53272.08462.08462.78072.78071.02141.0214
H41.10262.08462.08461.77602.40282.94632.94632.4028
H51.10262.08462.08461.77602.94632.40282.40282.9463
H62.05991.02142.78072.40282.94631.63703.10742.6412
H72.05991.02142.78072.94632.40281.63702.64123.1074
H82.05992.78071.02142.94632.40283.10742.64121.6370
H92.05992.78071.02142.40282.94632.64123.10741.6370

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.343 C1 N2 H7 110.343
C1 N3 H8 110.343 C1 N3 H9 110.343
N2 C1 N3 119.130 N2 C1 H4 107.475
N2 C1 H5 107.475 N3 C1 H4 107.475
N3 C1 H5 107.475 H4 C1 H5 107.289
H6 N2 H7 106.519 H8 N3 H9 106.519
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability