16.04
g/mol
0.062344
mol
4e+22
count
1
atoms
0
atoms
0
atoms
0.7488
g
0
g
0
g
0
g
16.04
g/mol
0.062344
mol
4e+22
count
1
atoms
0
atoms
0
atoms
0.7488
g
0
g
0
g
0
g
The Chemical Name Calculator provides instant identification of IUPAC systematic names, molecular formulas, molar masses, and functional groups for common organic compounds. In organic chemistry, every compound has both a common (trivial) name and a systematic IUPAC name — for example, acetone is systematically named propan-2-one, and vinegar's active ingredient acetic acid is formally called ethanoic acid. This tool bridges the gap between everyday chemical nomenclature and formal IUPAC standards by presenting comprehensive information for 20 frequently encountered organic molecules. Whether you are a student learning nomenclature conventions, a laboratory technician identifying reagent bottles, or a researcher cross-referencing chemical databases, this calculator provides a quick reference for structure types and functional group classification of important organic compounds.
This calculator uses a curated database of 20 common organic compounds, mapping each common name to its corresponding IUPAC systematic name, molecular formula, molar mass, structure type, and primary functional group.
IUPAC nomenclature follows strict rules established by the International Union of Pure and Applied Chemistry. The systematic name encodes the molecular structure:
$$\text{Prefix(substituents)} + \text{Root(chain length)} + \text{Suffix(functional group)}$$
For example, ethanol breaks down as: eth- (2 carbons) + -an- (single bonds) + -ol (alcohol). The molar mass is calculated from atomic weights:
$$M = \sum n_i \times A_i$$
where $$n_i$$ is the count of each element and $$A_i$$ is its atomic weight. For ethanol ($$C_2H_6O$$): $$M = 2(12.011) + 6(1.008) + 15.999 = 46.069 \text{ g/mol}$$.
The functional group classification follows IUPAC priority rules: carboxylic acids rank highest, followed by esters, amides, aldehydes, ketones, alcohols, amines, and finally hydrocarbons.
The results provide five key pieces of information. The IUPAC Name is the internationally standardized systematic name used in scientific publications and databases. The Molecular Formula shows the elemental composition using Hill system ordering (C first, H second, then alphabetical). The Molar Mass in g/mol is essential for stoichiometric calculations, solution preparation, and analytical quantification. The Structure Type classifies the compound into its organic family (alkane, alcohol, aldehyde, aromatic, etc.), which predicts general chemical behavior. The Functional Group identifies the reactive portion of the molecule responsible for its characteristic chemical properties and reactions.
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Aspirin (acetylsalicylic acid) contains both an ester group and a carboxylic acid. Its IUPAC name reflects the acetoxy substituent on benzoic acid.
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Chloroform's IUPAC name trichloromethane describes three chloro substituents on a methane backbone. It is a common organic solvent.
Common names are historical or trivial names that developed before systematic nomenclature existed (e.g., acetone, chloroform). IUPAC names follow standardized rules that encode the molecular structure, making them unambiguous and universally understood (e.g., propan-2-one, trichloromethane).
IUPAC names provide a unique, unambiguous identifier for every chemical compound. Unlike common names, which can vary by region and language, IUPAC names allow scientists worldwide to identify the exact same compound, preventing confusion in research and industry.
Molar mass is the sum of atomic weights of all atoms in the molecular formula. Each element's atomic weight (from the periodic table) is multiplied by its count and the products are summed. For example, water (H2O): 2(1.008) + 15.999 = 18.015 g/mol.
A functional group is a specific arrangement of atoms within a molecule that determines the compound's chemical reactivity and properties. Common functional groups include hydroxyl (-OH) in alcohols, carbonyl (C=O) in ketones and aldehydes, and carboxyl (-COOH) in carboxylic acids.
This calculator includes 20 of the most commonly encountered organic compounds. For compounds not in the database, you would need to apply IUPAC nomenclature rules manually or use a comprehensive chemical database like PubChem or ChemSpider.
For alkanes: (1) find the longest continuous carbon chain, (2) number carbons from the end nearest a substituent, (3) name substituents with position numbers, (4) use the root name for chain length (meth-, eth-, prop-, but-) plus the suffix -ane.
Alcohols use the suffix -ol. The parent chain must include the carbon bearing the -OH group, and the chain is numbered to give the -OH the lowest possible number. For example, butan-2-ol indicates a 4-carbon chain with -OH on carbon 2.
The Hill system orders elements in a molecular formula with carbon first, hydrogen second, and all remaining elements in alphabetical order. For compounds without carbon, all elements are listed alphabetically. This is the standard format used in chemical databases.
Glucose has five stereocenters, and the IUPAC name must specify the configuration (R or S) at each one. The full name (2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal describes the stereochemistry, the five hydroxyl groups, and the aldehyde function on a 6-carbon chain.
IUPAC assigns priority rankings to functional groups for naming purposes. The highest-priority group determines the suffix: carboxylic acid (-oic acid) > ester (-oate) > amide (-amide) > aldehyde (-al) > ketone (-one) > alcohol (-ol) > amine (-amine). Lower-priority groups become prefixes.
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