Chemistry Lewis Dot Structure Calculator

Molecular Structure Calculations

1. Lewis Dot Structure Chemistry Worksheet
2. Lewis Dot Structure Chemistry
3. Chemistry Lewis Dot Structure Calculator Worksheet
4. Lewis Structure Calculator

This demo will convert a skeletal figure, provided by a drawing in the HTML5 SketcherCanvas component on the left, into a Lewis Dot Structure in the Canvas on the right. When you are finished drawing your 2D structure, click on the Get Lewis Dot Structure button to see the result. This feature is customizable with publication quality graphics output in ChemDoodle 2D. Lewis structure calculator, This page lets you easily convert IUPAC names, common names, SMILES codes, CAS numbers, and other identifiers into chemical structures. On the back end it employs OpenChemLib to decode SMILES codes, the OPSIN library developed by Daniel Lowe, data from PubChem, various drug and natural product dictionaries, and openmolecules software. Lewis Structures in Organic Chemistry. Here is the simple view on this important topic: In Lewis structures, we show each covalent bond as two dots which represent a pair of electrons. For example: Therefore, we can say that Lewis structures are electron dot representations for molecules. Notes on using a TI-85 or TI-86 calculator. Javascript Construct a Lewis Dot Structure. Lewis dot structure quiz from Univ. JavaScript BINGO cards - elements and simple ions. JavaScript Chemical Jeopardy 'What's in a Name?' (all about names.

Colby Chemistry, Paul J. Schupf Computational Chemistry Lab

The simple theories of bonding that we learn in General Chemistry are powerfuland useful. These theories, which include Lewis structures, VSEPR, andhybridization, are simple models that help predict chemicalproperties. However, Lewis dot structures and hybridization are approximationsthat may or may not match reality. We should verify the usefulness of oursimple predictions with molecular orbital theory. If thetheoretical calculations are done carefully, we can learn a lot about chemical structure by comparing our Lewis structures and hybridizationarguments with the molecular orbitals.

The calculations in this database includebond lengths, angles, atomic charges, the dipole moment,bond orders, and molecular orbital energies. The best Lewis structure thatfits the molecular orbitals is also calculated, so you can directlycompare with your predictions. This best Lewis structure is presented withformal electron pair localized bonds and the hybridization of the atomicorbitals used to form these localized bonds. The Chime plugin is neededto see the 3-D structure of the molecules in these pages. See thelink at the bottom of the page for the Chime plugin.

Molecular orbital theory is based on approximations also. These calculationsare done with some of the best available calculation methods (DFT forgeometry and molecular orbital energies and ab initio for properties).We use Alain St-Amant's DeFT program (University of Ottawa).

The Molecular Structure Input Form, see below, will allow you to do calculationsfor molecules not in the database.These calculations take time; 1-2 hours in some cases.

You can use the Formula Search page or browse the links below. As of 07/12/05 there are 1056structures in the database.
A Best Lewis Structure and Donor Acceptor Interactions Tutorialis available to help you interpret those output sections. These Lewisstructure calculations are done using NBO Analysis.
Answer some Study Questions to help your understanding of some interesting chemistry.

Example Molecular Orbital Results

LiHLiFLiClLiOHLiCNLiBrC₂N₂NOO₂COF₂

Many More Diatomic molecules and ions

H₃⁺Li₂OBeH₂BeCl₂diboraneBH₃BH₂CNBH₂SH
BF₃BF₃2-BF₄⁺BF₂O^-BCl₃BH₃NH₃BH₃COBH₃PH₃BO₂NO
C₃C₅H₂OH₃O⁺H₄O⁺O₃O₄CO₂OCScyclic CO₂CO₂^-HCO⁺HOC⁺
N₃ radicalN₃ quartetHN₃N₃^-NCOHNCNHCNNO
NO₂NO₂⁺NO₂^-HOONNOO^-NO₂^- triplet NO₂²⁺NO₃^-NO₃^-triplet NO₂O^-
N₂Ocyclic N₂Ocyclic N₂O₂N₂O₄NO₂NO
ONOOHN₂H₂N₂H₂ tripletH₂NNH₂NN tripletNH₂FNHF₂NF₃NF₄^-N₂F₂N₂F₄BNHF
HNCl⁺NH₂ClN₃ClNCl₂NCl₃NOClONClNClOClNO₂ClNOOt-ClONOOCl₂
OF₂FOO•FOOFFNO₂FOONF₃^-Cl₃^-Cl₃FClF₂⁺
AlH₃AlF₃AlCl₃Al₂Cl₆
SiH₄SiH₃SiH₃SiO₂
P₂PCl₃SO₂SO₃SO₃^-SOCl₂SO₂Cl₂ClO₂ClOOClO₂⁺ClO₂^-ClOO^-
FClOFClO₂K₂O How to open pcb gerber file.

Many More Binary Hydrides and their Anions, Cations, and Radicals
Many More Triatomic molecules and their Anions, Cations, and Radicals
Many More Period 3 Compounds, Al, Si, P, S, and Cl
Many More Period 4 Compounds, Ga, Ge, As, Se, and Br

Acids

Onium Ions:NH₄⁺NH₃F⁺NH₃Cl⁺H₃O⁺H₃O₂⁺H₂F⁺PH₄⁺H₃S⁺H₂Cl⁺H₂CN⁺
Hydrides:HFHClHCNHCN tripletHNCHNCOHOCNHONCHCNOHNCSHSCNHN₃
H₂N₂H₂N=NN₂H₄H₂O₂P₂H₄H₂SH₂S₂
Oxyacids:H₂CO₃HONHNOHNO₂HNO₃H₂O₂HOFHOCl
HClO₃HClO₄H₃PO₂H₃PO₃H₃PO₄HSOHH₂SO₃H₂SO₄

Anions

Hydride Conjugates:F^-Cl^-OH^-CN^-NCO^-CNO

^-NCS^-CNS^-NSC^-N₃^-HN₂^-N₂H₃^-HOO^-
P₂H₃^-HS^-
Oxyanions:HCO₃^-CO₃^2-CO₃OH^-CO₃O^2-NO^-NO₂^-NO₃^-HO₂^-O₂^2-OF^-OCl^-ClO₂^-
ClO₃^-ClO₄^-H₂PO₂^-H₂PO₃^-H₂PO₄^-HPO₄^2-PO₄^3-HOS^-HSO^-
HSO₃^-SO₃^2-HSO₄^-SO₄^2-S₂O₃^2-

Many MoreHydroxyl Compounds, Donor-Acceptor Oxides, Oxyacids, and Anions
Many MoreFormally Double Bonded Hydroxyl Compounds, Donor-Acceptor Oxides, and Oxyacids (e.g.Carbonic and Nitric acid)

Organics

ethaneethyleneacetyleneH₂C=C, vinylidene
methanolformaldehydeformic acidmethylamineCF₃Cl

Screen record on mac no sound. Many More Carbon Compounds, Organics, and Organic Reagents
Many MoreOrganic Radical Cations, Neutral Radicals, Cations, and Anions

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Oxides

NH₃->OCH₃NH₂->OCH₂NH->OCH₃OH->OCH₂O->OCH₂O->O tripletH₂N₂->O
PH₃->OCH₃PH₂->OH₂S->OCH₃SH->OCH₃F->OCH₃OFCH₃Cl->OH₂S->O₂

Reactive Intermediates

OH radicalHOO radicalH₂O₂⁺ radicalHCO₃ radicalCO₃^- radical CO₃OH^-CO₃O^2-peroxodicarbonate dianion, O₂COOCO₂^2-
methylene singlet (CH₂)methylene triplet (CH₂)methyl radical (CH₃)CH₃⁺
ethyl radical (CH₃CH₂)CH₃CH₂⁺ethylene tripletcyclopropane radicalHCC•HCC^-
CH₃NH^-CH₃OH⁺CH₃OH₂⁺CH₃O^-CH₃O radicalCH₂OH⁺CH₃CO⁺CH₂CHO^-
CF₂ singletCF₂ tripletCF₃•CF₃⁺CCl₂ singletCCl₂ triplet
CHCl singletCHCl tripletCHBr singletCHBr triplet
H₂CF⁺CH₂Cl⁺CH₂Cl^-trans-C₂H₄Cl₂⁺Cl₂C=C singlet
allyl⁺allyl radicalallyl^-allylalcoholradicalallylchloride radical1-chloropropane radical
HCONH^-N₃ radicalN₃³⁺ singlet N₃³⁺ triplet N₂H⁺

Hydrogen Bonded and Neutral Complexes

H₂O dimerNH₃ dimerHF..waterHF..NH₃HCl..NH₃H₂O..H₂SH₂S..H₂OSO₂..H₂OH₂O..formaldehyde
HCN..formaldehydeHCN..H₂CCwater..COwater..HPO₂CO₂..H₂CO

Lewis Dot Structure Chemistry Worksheet

₂..CO₂
CO₂..waterH₂O..SO₃H₂S..SO₃PCl₃..Cl₂Cl₂..Cl₂CH₃radical..H₂H₂O..Cl•

Ion-Molecule Complexes

Li⁺.H₂OLi⁺.(H₂O)₂BeCl₂²⁺water..superoxide^-
Be²⁺..H₂C=CH₂ unsymmetricalBe²⁺..H₂C=CH₂ symmetricalBe⁺..H₂C=CH₂ unsymmetricalBe⁺..H₂C=CH₂ symmetrical
FHF^-CO₂F^-H₂..OH^-water..HCONH^-O₃..Br^-
H₃O⁺..H₂OH₃O⁺..CO₂H₃O⁺..N₂H₃O⁺..HO•NO⁺..H₂ONO⁺..N₂NO⁺..O

Lewis Dot Structure Chemistry

₂

Atomic and Ionic Energies

atomic energiescation energiesanion energies

Weird, Wacky, High Energy Structures

HCl^-H₃ClCH₄²⁺COH₂CH₂.HClCH₃OHCH⁺HNCO-cyclicC₄N₂CO₂O^2-CO₂^2-BH₄⁺AlH₄⁺FClPClPF

Chemistry Lewis Dot Structure Calculator Worksheet

₄⁺F^-

Lewis Structure Calculator

ClF₄^-

Go to the

Molecular Structure Input Form

Get your

Results Here

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This work was supported by an Academic Research Infrastructure Grant from the National Science Foundation, no. 9512457.Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

About the calculation methods

Every chemistry student has to learn how to draw Lewis Dot Structures. The key is to understand the steps and practice.

Lewis Structures are important to learn because they help us predict:

• the shape of a molecule.
• how the molecule might react with other molecules.
• the physical properties of the molecule (like boiling point, surface tension, etc.).

That helps us understand and predict interactions with things like medicine and our body, materials used to make buildings and airplanes, and all sorts of other substances. Lewis structures don't tell us everything, but along with molecule geometry and polarity they are hugely informative.

Search 100+ Lewis Structures on our site. (Opens new window.)

Click the Chemical Formula to see the Lewis Structure Acetone (C3H6O) AsCl3 (Arsenic Trichloride) AsF3 (Arsenic Trifluoride) AsF5 (Arsenic Pentafluoride) AsF6- (AsF6-) AsH3 (Arsenic Trihydride) AsO33- (Arsenite Ion) BBr3 (Boron Tribromide) BCl3 (Boron Trichloride) BF3 (Boron Trichloride) BF4- (Tetrafluoroborate Ion) BH3 (Boron Hydride) BH4- (BH4-) B(OH)3 (B(OH)3) BeCl2 (Beryllium Chloride) BeF2 (Beryllium Fluoride) BeH2 (Beryllium Hydride) Br2 (Bromine Gas or Elemental Bromine) Br3- (Tribromide Ion) BrF (Bromine Monofluoride) BrF2 (Bromine Difluoride) BrCl3 (Bromine Trichloride) BrF3 (Bromine Trifluoride) BrF5 (Bromine Pentafluoride) BrO- (Hypobromite Ion) BrO2- (Bromite Ion) BrO3- (Bromate Ion) C22- (Dicarbide Ion) CBr4 (Carbon Tetabromide) CCl4 (Carbon Tetachloride) ClF (Chlorine Monofluoride) CF2Cl2 (Dichlorodifluoromethane) CH2Cl2 (CH2Cl2) CH3- (CH3-) CH3Br (CH3Br) CH3Cl (Chloromethane or Methyl Chloride) CH3CN (Acetonitril or Methyl Cyanide) CH3COO- CH3COO- CH3COOH (Acetic Acid) CH3F (CH3F) CH3NH2 (Methylamine) CH3NO2 (CH3NO2) CH3OCH3 (Dimethyl Ether or Methoxymethane) CH3OH (Methanol or Methyl Alcohol) CH4 (Methane) C2F4 (C2F4) C2H2 (Ethyne or Acetylene) C2H2Br2 (C2H2Br2) C2H2Cl2 (C2H2Cl2) C2H4 (Ethene) C2H6 (Ethane) C2H6O C2H6O C3H6 (C3H6) C3H8 (Propane) C4H10 (Butane) C6H6 (Isomers - including Benzene) C6H12 (C6H12) CHCl3 (Chloromethane) CH2F2 (Difluoromethane) CH2O (Methanal or Formaldehyde) CH4O (CH4O) Cl2 (Chlorine Gas or Elemental Chlorine) Cl2CO (Cl2CO) Cl2O (Dichlorine Monoxide) Cl3PO (Phosphoryl Trichloride) ClF3 (Chlorine Trifluoride) ClF5 (Chlorine Tetrafluoride) ClO- (Hypochlorite Ion) ClO2 (Chlorine Dioxide) ClO2- (Chlorite Ion) ClO3- (Chlorate Ion) ClO4- (Perchlorate Ion) CO (Carbon monoxide) CO2 (Carbon Dioxide) CO32- (Carbonate Ion) COCl2 (COCl2) COF2 (COF2) COH2 (COH2) CN- (Cyanide Anion) CS2 (Carbon Disulfide) F2 (Fluorine Gas, Difluorine) H2 (Hydrogen Gas or Elemental Hydrogen) H2CO (Formaldehyde or Methanal) H2CO3 (Carbonic Acid) H2O (Water or Dihydrogen monoxide) H3O+ (Hydronium Ion) H2O2 (Hydrogen Peroxide or Dihydrogen Dioxide) HBr (Hydrogen Bromide or Hydrobromic Acid) HF (Hydrogen Fluoride or Hydrofluoric Acid) HCCH (Ethyne) HCl (Hydrogen Chloride or Hydrochloric Acid) HCO2- (Formate Ion) HCO3- (Hydrogen Carbonate Ion or Bicarbonate Ion) HCOOH (Methanoic Acid or Formic Acid) HI (Hydrogen Iodide or Hydroiodic Acid) HClO3 (Chloric Acid) HCN (Hydrogen Cyanide) HNO2 (Nitrous Acid) HNO3 (Nitric Acid) H2S (Dihydrogen Sulfide) HOCl (Hypochlorous Acid) H2Se (Dihydrogen Selenide) HSO3- (Bisulfite Ion) HSO4- (Bisulfate Ion) H2SO3 (Sulfurous Acid) H2SO4 (Sulfuric Acid) H3PO4 (Phosphoric Acid) I2 (Iodine Gas or Elemental Iodine) I3- (I3-) IBr2- (IBr2-) ICl (Iodine Chloride) ICl2- (ICl2-) ICl3 (ICl3) ICl4- (ICl4-) ICl5 (Iodine Pentachloride) IF2- (IF2-) IF3 (Iodine Trifluoride) IF4- (IF4-) IF5 (Iodine Pentafluoride) IO3- (Iodate Ion) IO4- (Perioiodate Ion) N2 (Nitrogen Gas, also called Elemental Nitrogen) N3- (Azide Ion) N2F2 (Dinitrogen Difluoride) N2H2 (Dinitrogen Dihydride) N2H4 (Dinitrogen Tetrahydride or Hydrazine or Diamine) N2O3 (Dinitrogen Trioxide) N2O4 (Dinitrogen Tetroxide) N2O5 (Dinitrogen Pentoxide) NCl3 (Nitrogen Trichloride) NF3 (Nitrogen Trifluoride) NH2- (NH2-) NH2Cl (Chloroamine) NH2OH (Hydroxylamine) NH3 (Ammonium or Nitrogen Trihydride) NH4+ (Ammonium Ion) NI3 (Nitrogen Triiodide) NO+ (Nitrosonium Ion) NO (Nitric Oxide or Nitrogen Monoxide) N2O (Nitrous Oxide or Dinitrogen Monoxide) NO2 (Nitrogen Dioxide) NO2- (Nitrite Ion) NO2Cl (NO2Cl) NO2F (NO2F) NO3- (Nitrate Ion) NOBr (Nitrosyl Bromide) NOCl (Nitrosyl Chloride) NOF (Nitrosyl Fluoride) O2 (Oxygen Gas, also called Elemental Oxygen) O22- (Perioxide Ion) O3 (Ozone) O3 O3 Resonance Structures OCl2 (OCl2) OCN- (Cyanate Ion) OCS (OCS) OF2 (Oxygen Difluoride) OH- (Hydroxide Ion) PBr3 Phosphorus Tribromide PBr5 Phosphorus Pentabromide PCl3 Phosphorus Trichloride PCl4- PCl4- PCl5 Phosphorus Pentachloride PF3 Phosphorus Trifluoride PF5 Phosphorus Pentafluoride PF6- Hexafluorophosphate Ion PH3 Phosphorus Trihydride POCl3 Phosphoryl Chloride or Phosphorus Oxychloride PO33- (Phosphite Ion) PO43- (Phosphate Ion) SBr2 (Sulfur Dibromide) SCl2 (Sulfur Dichloride) SCl4 (Sulfur Tetrachloride) SCN- (Thiocyanate) SeF4 (Selenium Tetrafluoride) SeF6 (Selenium Hexafluoride) SeO2 (Selenium Dioxide) SF2 (Sulfur Difluoride) SF4 (Sulfur Tetrafluoride) SF6 (Sulfur Hexafluoride) S2Cl2 (Diulfur Dichloride) SiCl4 (Silicon Tetrachloride) SiF4 (Silicon Tetrafluoride) SiF62- (Silicon Hexafluoride Ion) SiH4 (Silicon Tetrahydride) SiO2 (Silicon Dioxide) SnCl2 (Tin (II) Chloride) SOCl2 (SOCl2) SO2 (Sulfur Dioxide) SO3 (Sulfur Dioxide) SO32- (Sulfite Ion) SO42- (Sulfate Ion) Water (H2O) XeCl4 Xenon Tetrachloride XeF2 XeF2 XeF4 Xenon Tetrafluoride XeF6 Xenon Hexafluoride XeH4 XeO4 XeO3 XeO3 XeO2F2 XeO2F2

Steps for Writing Lewis Structures Find the total valence electrons for the molecule. Explain How Examples: H2S, NCl3, OH- Put the least electronegative atom in the center. Note: H always goes outside. Examples: NOCl, CF2Cl2, HCN Put two electrons between atoms to form a chemical bond. Examples: CH4, NH3, I2 Complete octets on outside atoms. Note: H only needs two valence electrons. If central atom does not have an octet, move electrons from outer atoms to form double or triple bonds. Examples: O2, N2, C2H4 Advanced Steps If you have extra electrons after the above steps add them to the central atom. Note: elements in the Period Three (usually S, P, or Xe) can have more than eight valence electrons. Examples: ClF3, SF4,XeH4 Check the Formal Charges to make sure you have the best Lewis Structure. Explain How Examples: SO42-, N2O, XeO3 Notable Exceptions to the Octet Rule H only needs 2 valence electrons. Be and B don't need 8 valence electrons. S and P sometimes have more than 8 val. Electrons. Elements in Period Three, Four, etc (on the periodic table) can hold more than 8 valence electrons.