1 Butyne And 2 Butyne

Cardinal Divergence – ane-Butyne vs 2-Butyne

All unproblematic aliphatic hydrocarbons are broadly categorized into 3 types based on the presence of carbon-carbon single or multiple bonds: alkanes, alkenes, and alkynes. Alkanes are saturated hydrocarbons and contain merely single carbon-carbon bonds. The full general formula of paraffin is C_northwardH_2n+2 . Some common alkanes include marsh gas, ethane, propane, and butane. Alkenes are the unbranched unsaturated hydrocarbons with at least one carbon-carbon double bond. The full general formula of alkene is C_northwardH_2n . The simplest alkene is ethylene. Butene, hexene, propene are some common examples for alkenes. Alkynes are the unsaturated hydrocarbons with at to the lowest degree ane carbon-carbon triple bail. The general formula of alkyne is C_nH_2n-2 . 1-butyne and ii-butyne are two simple alkynes that contain ane carbon-carbon triple bond in different places. Both has the aforementioned molecular formula of C₄H_{half dozen}, simply have some differences. The key difference betwixt 1-butyne and ii-butyne is that in 1-butyene, the triple bond is found between first and second carbon, whereas in 2-butyene, it is found between 2nd and third carbon atoms. Considering of this difference, these 2 substances have entirely unlike feature features.

i. Overview and Key Difference
2. What is i-Butyne
iii. What is 2-Butyne
four. Next Comparison – 1-Butyne vs 2-Butyne in Tabular Form
v. Summary

What is i-Butyne?

1-butyne is chosen a terminal alkyne due to the presence of last triple bond between the first and 2nd carbon atoms of the carbon chain. Considering of the presence of this final bond, 1-butyne can be distinguished from 2-butyene by two main tests. In the first test, ammoniacal cuprous chloride solution gives a cherry-red precipitate with 1-butyene, resulting in copper ane-butynide. In the 2nd test, ammoniacal silver nitrate solution reacts with ane-butyne, resulting in silver 1-butynide, which is a white precipitate. Both these two solutions do not react with two-butyne.

Figure 01: i-Butyne

1-butyne is an extremely flammable colorless gas. It is dense than normal air. The IUPAC name of ane-butyne is but-1-yne.

What is 2-Butyne?

2-butyne is a non-terminal alkyne, which has its triple bail in the middle of the carbon chain, connecting the second and the third carbon atoms. Unlike concluding alkynes, 2-butyne do not react with either ammoniacal cuprous chloride solution or ammoniacal silver nitrate solution to give feature precipitates. The terminal alkyl groups of 2-butyne provide electrons to sp-hybridized carbon, thus stabilizing the alkyene while decreasing the estrus of hydrogenation. Hence, the heat of hydrogenation is less in 2-butyne than in one-butyne. 2-butyne is a colorless liquid and emits a petroleum-like scent. Information technology has a low density than water and is not soluble in water. The IUPAC name is but-2-yne.

Figure 02: 2-Butyne

What is the Difference Between 1-Butyne and ii-Butyne?

1-Butyne vs 2-Butyne
1-Butyne is a terminal alkyne with a triple bond that connects starting time and 2nd carbon atoms.	2-Butyne is a not-last alkyne with a triple bail that connects 2nd and third carbon atoms.
Oestrus of Hydrogenation
Rut of hydrogenation is 292 kJ/mol.	Heat of hydrogenationis 275 kJ/mol.
Phase
one-Butyne is a colorless gas.	2-Butyne is a colorless liquid.
Stability
1-Butyne is less stable than 2-Butyne due to the presence of terminal triple bond.	ii-Butyne is more stable.
With Ammoniacal Cuprous Chloride Solution
1-Butyne gives a red precipitate of copper 1-butynide.	ii-Butyne gives no such precipitate.
With Ammoniacal Silver Nitrate Solution (Tollen's Reagent)
one-Butyne gives a white precipitate of silver acetylide.	2-Butyne gives no such precipitate.
IUPAC Name
IUPAC name is only-1-yne.	IUPAC proper noun is just-2-yne.
Mutual Name
Common name is ethylacetylene.	Common name is Dimethylacetylene.

Summary – 1-Butyne vs 2-Butyne

Both 1-butyne and ii-butyne are hydrocarbons that belong to the group of alkynes. 1-butyne is a terminal alkyne that has a triple bond connecting C1 and C2. It is a colorless gas. 2-butyne is a colorless liquid that has its triple bond connecting C2 and C3 atoms. Hence 2-butyne is a not-last alkyne. Due to this difference between 1-Butyne and 2-Butyne, these two hydrocarbons have entirely different chemical and physical properties. However, their chemical formula is the same, i.due east., C₄H₆.

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References:

1. Carey, Francis A., and Richard J. Sundberg. Advanced Organic Chemistry Part A: Structure and Mechanisms. Boston, MA, Springer US, 2007.
2. Lon, Clive. X-Kit FET Grade 12 PHYS Scientific discipline CHEMISTRY. S Africa, Pearson, 2008.
three. "1-BUTYNE." National Middle for Biotechnology Information. PubChem Chemical compound Database, U.S. National Library of Medicine, Bachelor hither. Accessed 8 Sept. 2017.
iv. "2-BUTYNE." National Center for Biotechnology Information. PubChem Chemical compound Database, U.South. National Library of Medicine, Bachelor here. Accessed eight Sept. 2017.

Image Courtesy:

1. "Ethylacetylene" By Magmar452 – Own work (CC0) via Commons Wikimedia
2. "Dimethylacetylene" By Edgar181 – Ain work (Public Domain) via Commons Wikimedia