Acetylene

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Acetylene
Acetylene
Acetylene
Acetylene – space-fillin model
space-fillin model o solid acetylene
Names
IUPAC name
Acetylene
Seestematic IUPAC name
Ethyne[1]
Identifiers
Jmol-3D images Image
ChEBI CHEBI:27518 YesY
ChEMBL ChEMBL116336 YesY
ChemSpider 6086 YesY
ECHA InfoCard 100.000.743
KEGG C01548 YesY
UNII OC7TV75O83 YesY
UN nummer 1001 (dissolved)
3138 (in mixtur wi ethylene an propylene)
Properties
C2H2
Molar mass 26.04 g·mol−1
Density 1.097 g/L = 1.097 kg/m3
Meltin pynt −80.8 °C, 192.4 K, −113.4 °F
Bylin pynt −84 °C (−119 °F; 189 K)
slightly soluble
Acidity (pKa) 25
Structur
Molecular shape Linear
Thermochemistry
Staundart molar
entropy
So298
201 J·mol−1·K−1
Std enthalpy o
formation
ΔfHo298
+226.88 kJ/mol
Hazards
NFPA 704
Flammability code 4: Will rapidly or completely vaporize at normal atmospheric pressur an temperatur, or is readily dispersed in air an will burn readily. Flash pynt ablo 23 °C (73 °F). E.g., propane Health code 1: Exposur would cause irritation but anly minor residual injury. E.g., turpentine Reactivity code 3: Capable of detonation or explosive decomposition but requires a strong initiatin soorce, must be heatit unner confinement afore initiation, reacts explosively wi watter, or will detonate if severely shocked. E.g., fluorine Special hazards (white): no codeNFPA 704 four-colored diamond
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Acetylene (seestematic name: ethyne) is the chemical compoond wi the formula C2H2. It is a hydrocarbon an the simplest alkyne.[2] This colourless gas is widely uised as a fuel an a chemical biggin block. It is unstable in pure furm an thus is uisually haundled as a solution.[3] Pure acetylene is odorless, but commercial grades uisually hae a marked odor due tae impurities.[4]

As an alkyne, acetylene is unsaturatit acause its twa carbon atoms are bondit thegither in a triple bond. The carbon–carbon triple bond places aw fower atoms in the same straicht line, wi CCH bond angles of 180°. Syne acetylene is a linear symmetrical molecule, it possesses the D∞h pynt group.[5]

References[eedit | eedit soorce]

  1. Acyclic Hydrocarbons. Rule A-3. Unsaturated Compounds and Univalent Radicals, IUPAC Nomenclature of Organic Chemistry
  2. R.H.Petrucci, W.S.Harwood and F.G.Herring "General Chemistry", 8th edn.(Prentice-Hall 2002), p.1072
  3. Peter Pässler, Werner Hefner, Klaus Buckl, Helmut Meinass, Andreas Meiswinkel, Hans-Jürgen Wernicke, Günter Ebersberg, Richard Müller, Jürgen Bässler, Hartmut Behringer, Dieter Mayer "Acetylene" in Ullmann's Encyclopedia of Industrial Chemistry, 2008, Wiley-VCH, Weinheim. doi:10.1002/14356007.a01_097.pub3. Article Online Posting Date: 15 October 2008
  4. Compressed Gas Association (1995) [www.stoodyind.com/safety/msds/Acetylene.pdf Material Safety and Data Sheet – Acetylene].
  5. Housecroft, C. E.; Sharpe, A. G. (2008). Inorganic Chemistry (3rd ed.). Prentice Hall. pp. 94–95. ISBN 978-0131755536. 

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