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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD=FULL/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 CCSD=FULL/cc-pVTZ
 hartrees
Energy at 0K-187.753476
Energy at 298.15K-187.757681
HF Energy-186.951829
Nuclear repulsion energy102.266475
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/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 3687 3496 24.30      
2 A 3602 3415 2.26      
3 A 2433 2307 0.09      
4 A 1690 1603 10.46      
5 A 1234 1170 0.31      
6 A 832 789 6.29      
7 A 633 600 107.86      
8 A 450 426 5.21      
9 A 360 341 25.24      
10 A 227 215 19.16      
11 B 3687 3496 23.49      
12 B 3603 3416 15.73      
13 B 1690 1602 29.38      
14 B 1375 1304 100.22      
15 B 1234 1170 0.33      
16 B 684 649 312.44      
17 B 450 426 20.82      
18 B 226 215 21.12      

Unscaled Zero Point Vibrational Energy (zpe) 14048.1 cm-1
Scaled (by 0.9481) Zero Point Vibrational Energy (zpe) 13319.0 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/cc-pVTZ
ABC
5.16957 0.12017 0.12015

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 0.600 0.062
C2 -0.001 -0.600 0.062
N3 -0.001 1.947 -0.091
N4 0.001 -1.947 -0.091
H5 -0.325 2.455 0.712
H6 0.857 2.326 -0.447
H7 0.325 -2.455 0.712
H8 -0.857 -2.326 -0.447

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20081.35552.55221.99211.99243.14053.0921
C21.20082.55221.35553.14053.09211.99211.9924
N31.35552.55223.89441.00361.00384.48684.3727
N42.55221.35553.89444.48684.37271.00361.0038
H51.99213.14051.00364.48681.66034.95314.9483
H61.99243.09211.00384.37271.66034.94834.9582
H73.14051.99214.48681.00364.95314.94831.6603
H83.09211.99244.37271.00384.94834.95821.6603

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.506 C1 N3 H5 114.402
C1 N3 H6 114.417 C2 C1 N3 173.506
C2 N4 H7 114.402 C2 N4 H8 114.417
H5 N3 H6 111.604 H7 N4 H8 111.604
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability