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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B2PLYP=FULL/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B2PLYP=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-187.986678
Energy at 298.15K-187.990662
HF Energy-187.724866
Nuclear repulsion energy102.167158
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 B2PLYP=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 A 3644 3496 30.35      
2 A 3557 3413 0.87      
3 A 2358 2262 0.24      
4 A 1663 1596 7.34      
5 A 1202 1153 0.23      
6 A 823 789 2.89      
7 A 545 522 122.31      
8 A 415 398 18.42      
9 A 395 379 18.69      
10 A 197 189 21.57      
11 B 3643 3496 29.61      
12 B 3560 3415 9.98      
13 B 1664 1596 26.02      
14 B 1369 1313 128.56      
15 B 1202 1153 0.25      
16 B 596 572 267.50      
17 B 415 398 8.40      
18 B 197 189 23.27      

Unscaled Zero Point Vibrational Energy (zpe) 13722.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 13164.9 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 B2PLYP=FULL/aug-cc-pVTZ
ABC
5.25810 0.11990 0.11989

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.603 0.054
C2 -0.002 -0.603 0.054
N3 -0.002 1.952 -0.083
N4 0.002 -1.952 -0.083
H5 -0.342 2.465 0.714
H6 0.844 2.350 -0.457
H7 0.342 -2.465 0.714
H8 -0.844 -2.350 -0.457

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20611.35572.55852.00532.00553.15673.1140
C21.20612.55851.35573.15673.11402.00532.0055
N31.35572.55853.90351.00711.00734.50144.3992
N42.55851.35573.90354.50144.39921.00711.0073
H52.00533.15671.00714.50141.67094.97744.9809
H62.00553.11401.00734.39921.67094.98094.9937
H73.15672.00534.50141.00714.97744.98091.6709
H83.11402.00554.39921.00734.98094.99371.6709

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.189 C1 N3 H5 115.351
C1 N3 H6 115.354 C2 C1 N3 174.189
C2 N4 H7 115.351 C2 N4 H8 115.354
H5 N3 H6 112.082 H7 N4 H8 112.082
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability