return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCNH (methyleneazane)

using model chemistry: QCISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS cis 2A'
1 2 yes CS trans 2A'

Conformer 1 (CS cis)

Jump to S1C2
Energy calculated at QCISD/6-31G
 hartrees
Energy at 0K-93.552396
Energy at 298.15K-93.553708
HF Energy-93.346579
Nuclear repulsion energy27.608317
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 QCISD/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' 3285 3165 8.41      
2 A' 2991 2882 67.28      
3 A' 1764 1700 16.91      
4 A' 1039 1001 120.02      
5 A' 921 888 176.72      
6 A" 927 893 14.03      

Unscaled Zero Point Vibrational Energy (zpe) 5463.4 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 5264.5 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 QCISD/6-31G
ABC
13.80720 1.22544 1.12554

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.108 0.658 0.000
N2 0.108 -0.598 0.000
H3 -0.673 1.439 0.000
H4 -0.727 -1.206 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.25611.10402.0431
N21.25612.18101.0330
H31.10402.18102.6456
H42.04311.03302.6456

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 126.107 H3 C1 N2 134.965
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at QCISD/6-31G
 hartrees
Energy at 0K-93.560251
Energy at 298.15K-93.561611
HF Energy-93.352427
Nuclear repulsion energy27.524189
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 QCISD/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' 3425 3301 0.02      
2 A' 3069 2957 37.50      
3 A' 1704 1642 19.22      
4 A' 1234 1189 24.40      
5 A' 967 932 231.86      
6 A" 1013 976 120.87      

Unscaled Zero Point Vibrational Energy (zpe) 5705.7 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 5498.1 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 QCISD/6-31G
ABC
13.92632 1.22214 1.12354

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.002 0.671 0.000
N2 -0.002 -0.599 0.000
H3 0.901 1.299 0.000
H4 -0.881 -1.129 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.26951.09992.0032
N21.26952.10141.0271
H31.09992.10143.0119
H42.00321.02713.0119

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 121.085 H3 C1 N2 124.824
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability