Page 1 Notes - Chemical Nomenclature: Monatomic Cations (IUPAC vs Traditional Names)

IUPAC (Stock System) name

The first, systematic name given for a monatomic cation (example: iron(II)).

Traditional name

Older, common name for a monatomic cation indicating its oxidation state (example: ferrous for Fe2+).

Monatomic cations

Cations formed from a single element; include multiple possible charges (e.g., Mn2+, Fe2+, Cu+, Fe3+, etc.).

Manganous

Traditional name for Mn2+ (manganese(II)).

Manganic

Traditional name for Mn3+ (manganese(III)).

Manganese(II)

IUPAC (Stock) name for Mn2+. Also called manganous in traditional nomenclature.

Iron(II)

IUPAC (Stock) name for Fe2+. Traditional name is ferrous.

Ferrous

Traditional name for Fe2+ (iron(II)).

Ferric

Traditional name for Fe3+ (iron(III)).

Iron(III)

IUPAC (Stock) name for Fe3+. Traditional name ferric.

Cobaltous

Traditional name for Co2+. (Cobalt(II).)

Cobaltic

Traditional name for Co3+. (Cobalt(III).)

Cobalt(II)

IUPAC (Stock) name for Co2+. Traditional name cobaltous.

Nickelous

Traditional name for Ni2+. (Nickel(II).)

Nickelic

Traditional name for Ni3+. (Nickel(III).)

Nickel(II)

IUPAC (Stock) name for Ni2+. Traditional name nickelous.

Cuprous

Traditional name for Cu+ (copper(I)).

Cupric

Traditional name for Cu2+ (copper(II)).

Copper(I)

IUPAC (Stock) name for Cu+. Traditional name cuprous.

Copper(II)

IUPAC (Stock) name for Cu2+. Traditional name cupric.

Stannous

Traditional name for Sn2+ (tin(II)).

Stannic

Traditional name for Sn4+ (tin(IV)).

Tin(II)

IUPAC (Stock) name for Sn2+. Traditional name stannous.

Tin(IV)

IUPAC (Stock) name for Sn4+. Traditional name stannic.

Plumbous

Traditional name for Pb2+ (lead(II)).

Plumbic

Traditional name for Pb4+ (lead(IV)).

Lead(II)

IUPAC (Stock) name for Pb2+. Traditional name plumbous.

Lead(IV)

IUPAC (Stock) name for Pb4+. Traditional name plumbic.

Aurous

Traditional name for Au+ (gold(I)).

Auric

Traditional name for Au3+ (gold(III)).

Gold(I)

IUPAC (Stock) name for Au+. Traditional name aurous.

Gold(III)

IUPAC (Stock) name for Au3+. Traditional name auric.

Argentous

Traditional name for Ag+ (silver).

Mercurous

Traditional name for mercury(I) ion (Hg2^+ or Hg2^2+ depending on context; commonly Hg2^+ in older nomenclature).

Mercuric

Traditional name for mercury(II) ion (Hg2+).

Chromous

Traditional name for Cr2+ (chromium(II)).

Chromic

Traditional name for Cr3+ (chromium(III)).

Chromium(II)

IUPAC (Stock) name for Cr2+. Traditional name chromous.

Chromium(III)

IUPAC (Stock) name for Cr3+. Traditional name chromic.

Cerous

Traditional name for Ce3+ (cerium(III)).

Ceric

Traditional name for Ce4+ (cerium(IV)).

Cerium(III)

IUPAC (Stock) name for Ce3+. Traditional name cerous.

Cerium(IV)

IUPAC (Stock) name for Ce4+. Traditional name ceric.

Arsenous

Traditional name for As3+ (arsenic(III)).

Arsenic

Traditional name for As5+ (arsenic(V)) in classic nomenclature; modern IUPAC name is arsenic(V) or arsenic.

Arsenic(III)

IUPAC (Stock) name for As3+. Traditional name arsenous.

Arsenic(V)

IUPAC (Stock) name for As5+. Traditional name arsenic (arsenicic).

Antimonous

Traditional name for Sb3+ (antimony(III)).

Antimonic

Traditional name for