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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCSD=FULL/6-31G*

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/6-31G*
 hartrees
Energy at 0K-187.481868
Energy at 298.15K-187.485854
HF Energy-186.868315
Nuclear repulsion energy101.254340
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/6-31G*
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 3624 3442 12.42      
2 A 3533 3356 2.72      
3 A 2424 2302 0.02      
4 A 1714 1628 16.38      
5 A 1247 1184 0.00      
6 A 831 790 18.06      
7 A 696 661 115.41      
8 A 380 361 0.00      
9 A 337 320 42.82      
10 A 203 193 12.43      
11 B 3623 3441 11.61      
12 B 3535 3358 7.12      
13 B 1713 1627 33.36      
14 B 1362 1294 65.99      
15 B 1247 1184 0.05      
16 B 756 718 411.44      
17 B 364 346 17.68      
18 B 200 190 13.83      

Unscaled Zero Point Vibrational Energy (zpe) 13894.5 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 13197.0 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/6-31G*
ABC
5.00538 0.11792 0.11787

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.607 0.032
C2 -0.006 -0.607 0.032
N3 -0.006 1.970 -0.074
N4 0.006 -1.970 -0.074
H5 -0.325 2.455 0.757
H6 0.855 2.373 -0.427
H7 0.325 -2.455 0.757
H8 -0.855 -2.373 -0.427

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21371.36742.57902.01272.01243.16243.1355
C21.21372.57901.36743.16243.13552.01272.0124
N31.36742.57903.94001.01411.01424.51444.4390
N42.57901.36743.94004.51444.43901.01411.0142
H52.01273.16241.01414.51441.67404.95244.9991
H62.01243.13551.01424.43901.67404.99915.0444
H73.16242.01274.51441.01414.95244.99911.6740
H83.13552.01244.43901.01424.99915.04441.6740

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.392 C1 N3 H5 114.566
C1 N3 H6 114.530 C2 C1 N3 175.392
C2 N4 H7 114.566 C2 N4 H8 114.530
H5 N3 H6 111.242 H7 N4 H8 111.242
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability