Template:Chem2

This template uses Lua: Module:Chem2 (sandbox)

This template should not be used in citation templates such as Citation Style 1 and Citation Style 2, because it includes markup that will pollute the COinS metadata they produce; see Wikipedia:COinS.

{{chem2}} is a template used to format a chemical formulaorequation.

• 1 Use
  • 1.1 Formula punctuation
  • 1.2 end }-bracket issue
• 2 Formulas, charges, equations
• 3 Wikilinks
  • 3.1 Whole formula link
  • 3.2 Link each element (C, Hg) and generic element code (R, X)
  • 3.3 Link functional groups
  • 3.4 All recognised symbols and codes
  • 3.5 Elements and element-style symbols
  • 3.6 Groups
• 4 Examples and tests
  • 4.1 More
  • 4.2 Chem vs chem2
• 5 Predefined codes (groups etc.)
• 6 TemplateData
• 7 Tracking
• 8 See also

When input ends correctly with a }-bracket, like with A_{x}H_{1-x}, the final }-brackets are technically mixed up:

{{chem2|A_{x}H_{1-x}}} → A_xH_{−1x} N

The closing bracket {..} of input and end of template brackets }}.

• Solutions:

add empty pipe: {{chem2|..{..}|}} (empty parameter #2)

add parameters numbers 1 and 2 (empty): {{chem2|1=..{..}|2=}}

add a space: {{chem2|..{..} }}

Result: {{chem2|A_{x}H_{1-x}|}} → A_xH_1−x Y

Formulas (without charge) are just written:

• {{chem2|CH3(CH2)5CH3}} → CH₃(CH₂)₅CH₃
• {{chem2|Fe3S2(CO)9}} → Fe₃S₂(CO)₉
• {{chem2|C_{''n''}H_{2''n''+2}|}} → C_nH_2n+2

Charges are written inside parentheses:

• {{chem2|SO4(2-)}} → SO2−4
• {{chem2|S19(2+)}} → S2+19

Charges +1 and −1 can be written plain:

• {{chem2|Na+}} → Na⁺
• {{chem2|O2-}} → O−2

same as {{chem2|O2(-)}} → O−2

Chemical equations:

• {{chem2|2 S + 3 O2 + 2 H2O -> 2 H2SO4}} → 2 S + 3 O₂ + 2 H₂O → 2 H₂SO₄
• {{chem2|2S + 3O2 + 2H2O -> 2H2SO4}} → 2S + 3O₂ + 2H₂O → 2H₂SO₄

The arrows can be written as -> or just →. All characters (and unicode markup) are valid input except \, = (Mediawiki use it), _ and - (endash etc.)

• {{chem2|2 H2(g) + O2(g) -> 2H2O(g)|}} → 2 H₂(g) + O₂(g) → 2H₂O(g)
• {{chem2|NH2RCHCO2H <-> NH3+RCHCO2-}} → NH₂RCHCO₂H ⇌ NH+3RCHCO−2

Hapticity and mu:

• {{chem2|W(CO)3(PiPr3)2(\h{2}H2)}} → W(CO)₃(PiPr₃)₂(η²-H₂)
• {{chem2|W(CO)3(PiPr3)2(\h{2}H2)|auto=yes}} → W(CO)₃(PiPr₃)₂(η²-H₂)

As of March 2023^[update], {{chem2}} should not be used inside wikilinks; this can cause erratic failures to properly render sub/superscripts in other invocations on the same page. Instead, use the following options.

Link the whole formula with |link=<wiki pagename>:

• {{chem2|FeCl3|link=Iron(III) chloride}} → FeCl₃

Or use wikilink brackets in input like [[ammonia|NH3]]:

• {{chem2|3[[hydrogen|H2]] + 2[[nitrogen|N2]] <->2[[ammonia|NH3]]}} → 3H₂ + 2N₂ ⇌ 2NH₃

Use |auto=yes to link from the first occurrence of each element symbol, and some functional-group symbols such as Ph

• {{chem2|CH3CH2CH3CBrFCIClCH3|auto=yes}} → CH₃CH₂CH₃CBrFCIClCH₃

Some common groups are recognized and linked if you wikilink them using [[ ]]

• {{chem2|R\-[[COOH]]}} → R-COOH
• {{chem2|[[CH3]]C[[R]]2[[I]]}} → CH₃CR₂I
• In particular H2O links to water of crystallizationin{{chem2|CuSO4 * 5 [[H2O]]}} → CuSO₄ ·5H₂O, because a link to water is generally unnecessary.

You can link to any article even if chem2 is unaware of it:

• {{chem2|[[C6H5NH2]]}} → C₆H₅NH₂

To change the default link:

• {{chem2|[[water|H2O]]}} → H₂O

(The first『→』in each example is not part of the output; it separates the example from its output.)

• {{chem2|[Cl4Re\qReCl4](2-)|}} → [Cl₄Re≣ReCl₄]²⁻
• {{chem2|NH2RCHCO2H <-> NH3+RCHCO2−}} → NH₂RCHCO₂H ⇌ NH+3RCHCO−2

• {{chem2|\\hallo}} → \hallo
• {{chem2|H3CC\tCH <-> H2C\dC\dCH2}} → H₃CC≡CH ⇌ H₂C=C=CH₂
• {{chem2|4 NH3 + 5 O2 -> 4 NO + 6 H2O}} → 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

• {{chem2|H2O → H2O}} → H₂O → H₂O
• {{chem2|H2O(l) -> H2O(g)}} → H₂O(l) → H₂O(g)

• {{chem2|4 NH3 + 5 O2 → 4 NO + 6 H2O}} → 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O
• {{chem2|4NH3 + 5O2 → 4NO + 6H2O}} → 4NH₃ + 5O₂ → 4NO + 6H₂O
• {{chem2|2Mn2(+)}} → 2Mn+2
• {{chem2|2Mn2(+) + 3H2O}} → 2Mn+2 + 3H₂O
• {{chem2|Mn–}} → Mn⁻

• {{chem2|Mn2(2-)}} → Mn2−2
• {{chem2|Mn2☃+}} → Mn₂☃⁺;
• {{chem2|Mn2(2☃–)}} → Mn₂(₂☃⁻)
• {{chem2|Mn2(+)}} → Mn+2
• {{chem2|Mn2+}} → Mn+2
• {{chem2|Mn2(-)}} → Mn−2
• {{chem2|Mn2-}} → Mn−2

• {{chem2|C_{''n''}H_{2''n'' + 2}|}} → C_nH_2n + 2
• (chem: {{chem|C|''n''|H|2''n'' + 2}} → C
  _nH
  _2n + 2
• {{chem2|C_{abc}|}} → C_abc
• {{chem2|CoCl2*1.5H2O}} → CoCl₂·1.5H₂O
• {{chem2|Cu2C2*H2O}} → Cu₂C₂·H₂O

Special

• {{chem2|[Me2Al(\m{2}Me)]2}} → [Me₂Al(μ₂-Me)]₂
• {{chem2|^{13}CO2}} → ¹³CO₂
• {{chem2|^{13}CO2|auto=yes}} → ¹³CO₂
• {{chem2|\h{5}(C5H5)2TiCl2}} → η⁵-(C₅H₅)₂TiCl₂
• (bad) {{chem2|\h{5}\s(C5H5)2TiCl2}} → η⁵-−(C₅H₅)₂TiCl₂
• {{chem2|CH2\dCH2\sCH2\sC\tCH\qMn}} → CH₂=CH₂−CH₂−C≡CH≣Mn

• {{chem2|RC(OR')3}} → RC(OR')₃
• {{chem2|C\\C}} → C\C
• {{chem2|C2*NH3}} → C₂·NH₃
• {{chem2|C2*2NH3}} → C₂·2NH₃
• {{chem2|C1.2H3.5}} → C_1.2H_3.5

• {{chem2|\b\bAbC\e\e}} → AbC
• {{chem2|C2(μ\-C)}} → C₂(μ-C)

• {{chem2|SO4(2-)}} → SO2−4
• {{chem2|2Mn2(2+)}} → 2Mn2+2
• {{chem2|CH3-CH2-OH}} → CH−3CH−2OH
• {{chem2|[ZnCl4]-}} → [ZnCl₄]⁻
• {{chem2|[ZnCl4](2-)}} → [ZnCl₄]²⁻
• {{chem2|((H2O)5{CoCl2})2|auto=yes}} → ((H₂O)₅{CoCl₂})₂
• {{chem2|Si(OH)4}} → Si(OH)₄

• {{chem2|Cu2C2*H2O|auto=yes}} → Cu₂C₂·H₂O
• {{chem2|Cu2C2*2H2O}} → Cu₂C₂·2H₂O
• {{chem2|CuSO*2H2O}} → CuSO·2H₂O
• {{chem2|CuSO4*15H2O}} → CuSO₄·15H₂O
• {{chem2|CuSO4(H2O)5}} → CuSO₄(H₂O)₅
• {{chem2|H+ + OH- → H2O}} → H⁺ + OH⁻ → H₂O
• {{chem2|H → O}} → H → O

• {{chem2|ZxPo4}} → ZxPo₄     Unknown element.
• {{chem2|((Na)Cl}} → ((Na)Cl     Too many "(".
• {{chem2|Si(OH))4}} → Si(OH))₄     Too many ")".
• {{chem2|Si&[[☃]]Si}} → Si&☃Si
• {{chem2|1=CH2=CH2}} → CH₂=CH₂

• {{chem2|Cl2O6|link=dichlorine hexoxide}} → Cl₂O₆
• {{chem2|[Fe(Phen)(Phen)3](2+)}} → [Fe(Phen)(Phen)₃]²⁺
• {{chem2|[Fe(Phen)(Phen)3](2+)|auto=yes}} → [Fe(Phen)(Phen)₃]²⁺
• {{chem2|[C2O2](2+)}} → [C₂O₂]²⁺
• {{chem2|SI4|link=Tomato}} → SI₄
• {{chem2|H2SO4+}} → H₂SO+4
• {{chem2|Mn-}} → Mn⁻
• {{chem2|Mn22+}} → Mn+22, {{chem2|Mn22-}} → Mn−22
• {{chem2|Mn(2+)}} → Mn²⁺
• {{chem2|Mn2(+)}} → Mn+2
• {{chem2|Mn(22-)}} → Mn²²⁻
• {{chem2|Mn3(22-)}} → Mn22−3
• {{chem2|Mn(22+)}} → Mn²²⁺
• {{chem2|Mn2(22+)}} → Mn22+2
• {{chem2|Mn2(2+)}} → Mn2+2
• {{chem2|Mn22(2+)}} → Mn2+22

• {{chem|(CH|3|)|2|CO}} → (CH
  ₃)
  ₂CO
• {{chem2|(CH3)2CO}} → (CH₃)₂CO
• {{chem|H|2|+}} → H⁺
  ₂
• {{chem2|H2+}} → H+2

• Category:Pages using Chem2 with parameter issues (0)

• {{Chem}}
• <chem>: WP:MATHCHEM — by TeX

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