CCCBDB calculation results Page

using model chemistry: PBE1PBE/3-21G

States and conformations

State	Conformation	minimum conformation	conformer description	state description
1	2	yes	C1	¹A

State

Conformation

minimum conformation

conformer description

state description

yes

¹A

Conformer 1 (Cs)

Jump to S1C2

Vibrational Frequencies calculated at PBE1PBE/3-21G

Rotational Constants (cm^-1) from geometry optimized at PBE1PBE/3-21G
See section I.F.4 to change rotational constant units

Geometric Data calculated at PBE1PBE/3-21G

Electronic energy levels

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1

Energy calculated at PBE1PBE/3-21G

	hartrees
Energy at 0K	-206.563202
Energy at 298.15K	-206.566726
HF Energy	-206.563202
Nuclear repulsion energy	101.312579

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 PBE1PBE/3-21G

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)	Raman Act (Å⁴/u)	Dep P	Dep U
1	A	3542	3402	8.87	80.62	0.31	0.47
2	A	3139	3014	2.10	83.25	0.40	0.57
3	A	3040	2920	22.08	103.39	0.19	0.32
4	A	2369	2275	0.19	41.98	0.27	0.43
5	A	1542	1481	8.32	21.07	0.67	0.80
6	A	1418	1362	22.06	12.75	0.75	0.86
7	A	1401	1346	1.20	10.71	0.74	0.85
8	A	1274	1223	21.68	5.96	0.67	0.80
9	A	1038	997	35.79	7.16	0.34	0.51
10	A	994	954	55.95	1.23	0.75	0.85
11	A	909	873	24.84	1.91	0.09	0.17
12	A	618	594	2.38	2.24	0.30	0.46
13	A	467	448	39.70	1.78	0.73	0.84
14	A	347	334	142.94	8.21	0.75	0.85
15	A	234	224	6.20	4.11	0.75	0.86

Unscaled Zero Point Vibrational Energy (zpe) 11165.5 cm^-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 10723.3 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 PBE1PBE/3-21G

A	B	C
1.08145	0.16006	0.14470

See section I.F.4 to change rotational constant units

Geometric Data calculated at PBE1PBE/3-21G

Point Group is C₁

Cartesians (Å)

Atom	x (Å)	y (Å)	z (Å)
C1	-0.554	0.604	0.038
C2	0.827	0.123	0.002
O3	-1.524	-0.459	-0.114
H4	-0.694	1.191	0.959
H5	-0.720	1.274	-0.811
H6	-1.419	-1.074	0.657
N7	1.912	-0.297	-0.019

Atom - Atom Distances (Å)

	C1	C2	O3	H4	H5	H6	N7
C1		1.4635	1.4463	1.1007	1.0939	1.9867	2.6262
C2	1.4635		2.4248	2.0906	2.0925	2.6286	1.1631
O3	1.4463	2.4248		2.1353	2.0333	0.9922	3.4404
H4	1.1007	2.0906	2.1353		1.7714	2.3971	3.1560
H5	1.0939	2.0925	2.0333	1.7714		2.8561	3.1655
H6	1.9867	2.6286	0.9922	2.3971	2.8561		3.4863
N7	2.6262	1.1631	3.4404	3.1560	3.1655	3.4863

picture of cyanomethanol state 1 conformation 2

More geometry information
Calculated Bond Angles

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	N7	177.954	C1	O3	H6	107.662
C2	C1	O3	112.877	C2	C1	H4	108.407
C2	C1	H5	108.954	O3	C1	H4	113.239
O3	C1	H5	105.502	H4	C1	H5	107.639

Electronic energy levels

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)

Number	Element	Mulliken
1	C	-0.238
2	C	0.335
3	O	-0.537
4	H	0.257
5	H	0.298
6	H	0.367
7	N	-0.482

Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)

	x	y	z	Total
	-2.049	1.149	1.518	2.797
CHELPG
AIM
ESP

Electric Quadrupole moment
Quadrupole components in D Å

Primitive
	x	y	z
x	-31.595	1.225	-2.212
y	1.225	-20.335	-1.865
z	-2.212	-1.865	-21.533

Traceless
	x	y	z
x	-10.661	1.225	-2.212
y	1.225	6.229	-1.865
z	-2.212	-1.865	4.432

Polar
3z²-r²	8.863
x²-y²	-11.260
xy	1.225
xz	-2.212
yz	-1.865

Polarizabilities
Components of the polarizability tensor.
Units are Å³ (Angstrom cubed)
Change units.

	x	y	z
x	4.774	-0.372	-0.040
y	-0.372	3.187	-0.203
z	-0.040	-0.203	2.643

<r²> (average value of r²) Å²

<r²>	79.312
(<r²>)^1/2	8.906

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
	Home All data for one species Geometry Experimental Experimental Geometries Same bond/angle many molecules Internal Coordinates by type Bond angles Calculated Calculated geometry Rotational constant Moments of inertia Products of moments of inertia BSE Bond lengths Show me a calculated geometry Comparisons Bonds, angles Rotational Constants Products of moments of inertia Point group Bad Calculations Bad moment of inertia Tutorials and Explanations Angle formulas Vibrations Experimental Vibrational frequencies Calculated Frequencies Scale factors Reactions Entropies Ions List Ions Energy Calculated Ionization Energy Compare Ionzation energy Electron Affinity Calculated Electron affinity Compare Electron affinity Proton Affinity Calculated Proton affinity Compare Proton affinity Ionization changes point group Experimental One molecule all properties One property a few molecules Enthalpy of formation Entropy Integrated Heat Capacity Heat Capacity Rotational Constants Vibrational Frequencies Dipole moment Ionization Energy Polarizability Quadrupole Point Groups Geometry Experimental Geometries Internal Coordinates by type Bond angles Rotational Constants Point Groups Diatomic bond lengths Vibrations Vibrational frequencies Diatomic Triatomics Energy Atomization Energy Internal Rotation Electrostatics Dipole Quadrupole Polarizability Reference Data Reference states Spin Splittings Molecules with good enthalpy Enthalpy at 0 Kelvin Calculated Energy Optimized Energy Energy 298K Minimum conformation Hydrogen bonds H bond with counterpoise Reaction Reaction Energy 0K Reaction Energy 298K Internal Rotation Barriers to internal rotation Rotational barrier and dipole Rotational Barrier 2 molecules Orbital HOMO LUMO gap HOMO Orbital Energies Nuclear repulsion energy Correlation Full vs Frozen core energies Partial correlation energies Ion Calculated Ionization Energy Vertical ionization Energy Calculated Electron affinity Calculated Proton affinity Atom charge differences Excited State Singlet triplet gap Electronic state Transition state Basis Set Extrapolation BSE energy BSE Bond lengths Geometry Calculated geometry AIM bond orders One type of bond Rotation Rotational constant Products of moments of inertia Moments of inertia Inertial defects Second moments Point group State symmetry <r2> Sorted by r2 Z-matrix Bad Calculations Bad moment of inertia Bad Calculated Bond Lengths Bad point group Worst molecules Vibrations Frequencies Animated vibrations Anharmonic Zero point energy (ZPE) Scale Factors Scale factors Scale factor uncertainty Calculate a scale factor Why scale vibrations Set scaling factors Bad Calculations Bad Vib. HF vs MP2 Bad vib. Calc. vs exp. Big anharmonicity Electrostatics Charges Mulliken CHELP Aim ESP Dipole Dipole Dipole angle Dipole calculation types Quadrupole Polarizability Spin Spin density Entropy and Heat Capacity Entropy Reaction entropy Heat Capacity Reaction Reaction Energy 0K Reaction Energy 298K Isodesmic reactions Transition State Transition state Transition state frequencies Transition state geometries IRC Lookup by property By frequency Comparisons Geometry Bonds, angles Bond, angle, or dihedral DFT grid size on point group DFT grid on bond length Core correlation - bond length Same bond/angle many molecules Isoelectronic diatomics Isoelectronic triatomic angles Average bond lengths Rotation Rotational Constants Products of moments of inertia Point group Vibrations Vibrations 2 calculations Frequency differences One frequency Zero point energy Intensity Intensity for one mode Vibrational intensities Reduced mass comparison Anharmonic Triatomic Scale factors Energy Reaction Reaction Energy 0K Reaction Energy 298K Atomization 0K Atomization 298K Single point vs optimized DFT grid size on energy Semiempirical enthalpy Internal rotation Similar molecules Conformation Sets of isomers Sets of tautomers Isomers Entropy Entropy Heat capacity Entropy of several molecules Integrated heat capacity Reaction entropy Electrostatics Dipole Polarizability Several molecules Quadrupole Ion Compare Ionzation energy Koopman ionization energy Koopman IE for a few molecules Compare Electron affinity Compare Proton affinity Protonation Site Resources Info on Results Calculations Done Method and basis set List molecules One molecule Multiple conformers, states Multiple conformers, states Basis functions used I/O files Input/output files MOL file Z-matrix wfn files Glossary Conversion Forms B to I, I to B Angle formulas Integrated heat Capacity Calculating Enthalpy Links NIST Links NIST webbook bibliographic data CCCBDB Experimental data External links Basis Set Exchange Computational Chemistry List Thermochemistry in Gaussian Minnesota Database Collection Benchmark Energy and Geometry Point Groups Thermochemistry Thermochemistry Molecules with good enthalpy A → B + C Reference states Tutorials Vibrations Why scale vibrations Zero-point energies Entropy Methyl rotor entropy Entropy and conformations Energy Getting enthalpy of formation Vertical vs adiabatic IE Thermo from calculations Electrostatics Dipole parts by point group Quadrupoles Geometry Angle formulas Cost Cost Comparison Timings Comparison Bad Calculations Geometry Bad moment of inertia Bad Calculated Bond Lengths Bad point group Worst molecules Vibrations Bad vib. Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HOCH2CN (cyanomethanol)

using model chemistry: PBE1PBE/3-21G

States and conformations

Conformer 1 (Cs)

Conformer 2 (C1)

All results from a given calculation for HOCH₂CN (cyanomethanol)