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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: CCSD=FULL/TZVP

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=FULL/TZVP
 hartrees
Energy at 0K-150.910700
Energy at 298.15K-150.918743
HF Energy-150.300657
Nuclear repulsion energy83.276884
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=FULL/TZVP
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 3528 3343 0.61      
2 A1 3100 2937 36.39      
3 A1 1683 1595 51.75      
4 A1 1512 1433 0.11      
5 A1 1130 1071 41.22      
6 A1 892 845 1.58      
7 A1 461 436 4.80      
8 A2 3618 3428 0.00      
9 A2 1432 1357 0.00      
10 A2 1094 1036 0.00      
11 A2 258 244 0.00      
12 B1 3617 3427 0.03      
13 B1 3148 2983 28.42      
14 B1 1399 1325 0.16      
15 B1 869 824 2.08      
16 B1 396 375 96.98      
17 B2 3528 3343 1.06      
18 B2 1674 1586 5.23      
19 B2 1440 1364 27.74      
20 B2 1114 1056 75.37      
21 B2 834 790 407.50      

Unscaled Zero Point Vibrational Energy (zpe) 18362.4 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 17398.4 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=FULL/TZVP
ABC
1.18008 0.30419 0.27533

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.556
N2 0.000 1.256 -0.186
N3 0.000 -1.256 -0.186
H4 0.878 0.000 1.201
H5 -0.878 0.000 1.201
H6 0.816 1.316 -0.784
H7 -0.816 1.316 -0.784
H8 -0.816 -1.316 -0.784
H9 0.816 -1.316 -0.784

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.45881.45881.09011.09012.04722.04722.04722.0472
N21.45882.51262.06742.06741.01331.01332.76372.7637
N31.45882.51262.06742.06742.76372.76371.01331.0133
H41.09012.06742.06741.75662.38252.92272.92272.3825
H51.09012.06742.06741.75662.92272.38252.38252.9227
H62.04721.01332.76372.38252.92271.63163.09602.6312
H72.04721.01332.76372.92272.38251.63162.63123.0960
H82.04722.76371.01332.92272.38253.09602.63121.6316
H92.04722.76371.01332.38252.92272.63123.09601.6316

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.514 C1 N2 H7 110.514
C1 N3 H8 110.514 C1 N3 H9 110.514
N2 C1 N3 118.902 N2 C1 H4 107.521
N2 C1 H5 107.521 N3 C1 H4 107.521
N3 C1 H5 107.521 H4 C1 H5 107.356
H6 N2 H7 107.231 H8 N3 H9 107.231
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability