- 2-Butanol
- N-Butanol
- 2-Metil-2-pentanol
- 2-Metil-1-butanol
- Bahan bakar butanol
- Tert-Amil alkohol
- Isobutanol
- Tert-Butil alkohol
- Butanol
- Heksanol
- 2-Butanol
- Butanol
- Tert-Butyl alcohol
- Tert-Amyl alcohol
- Isopropyl alcohol
- 1-Butanol
- 3-Methyl-2-butanol
- 2-Methyl-1-butanol
- Isobutanol
- Pinacolyl alcohol
- Comparison of boiling points between 2‐butanol and isobutanol
- organic chemistry - Boiling points of Butan-2-ol and Butan-1-ol ...
- Synthesis of 2-Phenyl-2-Butanol from Grignard Reagent
- Calculating the percentage of (+)-2- butanol in the sample
- Synthesizing 2-methyl-2-butanol - Chemistry Stack Exchange
- How to prepare 2-bromobutane from 1-butanol? [closed]
- How to convert 2-propanol to 2-butanol? - Chemistry Stack …
- Why does CH3CH (OH)CH2CH3 give iodoform test?
- Why is this named 3-phenyl-2-butanol instead of 2-phenyl-3 …
- Rate of dehydration for butan-2-ol and butane-2,3-diol
2-Butanol GudangMovies21 Rebahinxxi LK21
2-Butanol, atau sec-butanol, adalah senyawa organik dengan rumus kimia CH3CH(OH)CH2CH3. Alkohol sekunder ini berupa cairan tak berwarna yang mudah terbakar dan dapat bercampur dengan air (perbandingan 2-butanol:air = 1:3), dan bercampur sempurna dengan pelarut organik. 2-Butanol ini diproduksi dalam skala besar, terutama sebagai prekursor untuk metil etil keton, suatu pelarut industri. 2-Butanol bersifat kiral sehingga dapat diperoleh sebagai dua stereoisomer yang disimbolkan sebagai (R)-(−)-2-butanol dan (S)-(+)-2-butanol. Normalnya dijumpai sebagai campuran kedua stereoisomer tersebut dengan perbandingan 1:1 — suatu campuran rasemat.
Pabrikasi dan pembuatan
2-Butanol dibuat secara industri dengan hidrasi 1-butena atau 2-butena:
Asam sulfat digunakan sebagai katalis untuk konversi ini.
Dalam skala laboratorium, ia dapat dibuat melalui reaksi Grignard dengan mereaksikan etilmagnesium bromida dengan asetildehida dalam dietil eter kering atau tetrahidrofuran (THF).
Meskipun beberapa 2-butanol digunakan sebagai pelarut, ia utamanya diubah menjadi butanon (metil etil keton, MEK), suatu pelarut industri yang penting dan ditemukan dalam banyak pembersih rumah tangga dan penghilang cat. Meskipun penghilang cat sudah mulai menghindari pemakaian MEK karena masalah kesehatan dan legalitas baru. Ester volatil dari 2-butanol memiliki aroma yang harum dan dalam jumlah yang kecil digunakan sebagai parfum atau perisa buatan.
Kelarutan
Kelarutan 2-butanol yang dicantumkan seringkali tidak tepat, termasuk beberapa referensi yang sangat terkenal seperti Merck Index, CRC Handbook of Chemistry and Physics, dan Lange's Handbook of Chemistry. Bahkan International Programme on Chemical Safety mencantumkan juga kelarutan yang salah. Kesalahan berjamaah disebabkan oleh Beilstein's Handbuch der Organischen Chemie (Handbook of Organic Chemistry). Karya ini menyantumkan kelarutan yang salah yaitu 12,5 g/100 g air. Banyak sumber lain menggunakan kelarutan ini, yang telah menggelinding bagaikan bola salju menjadi kesalahan massal di dunia industri. Data yang benar (35,0 g/100 g pada 20 °C, 29 g/100 g pada 25 °C, dan 22 g/100 g pada 30 °C) pertama kali dipublikasikan pada tahun 1886 oleh Alexejew dan data yang serupa dilaporkan oleh ilmuwan lain termasuk Dolgolenko dan Dryer berturut-turut pada tahun 1907 dan 1913.
Pencegahan
Seperti butanol lainnya, 2-butanol memiliki toksisitas aku yang rendah. LD50nya adalah 4400 mg/kg (tikus, oral).
Beberapa kejadian ledakan telah dilaporkan selama distilasi konvensional 2-butanol, nampaknya akibat dari penumpukan peroksida dengan titik didih yang lebih tinggi dari pada alkohol murni (sehingga terkonsentrasi pot penampung selama distilasi). Oleh karena alkohol, tidak seperti eter, tidak diketahui mampu membentuk peroksida renik, bahayanya menjadi terabaikan. 2-Butanol adalah Bahan Kimia Pembentuk Peroksida Kelas B (Class B Peroxide Forming Chemicals).
Referensi
Pranala luar
International Chemical Safety Card 0112
"NIOSH Pocket Guide to Chemical Hazards #0077". National Institute for Occupational Safety and Health (NIOSH).
IPCS Environmental Health Criteria 65: Butanols: four isomers
IPCS Health and Safety Guide 4: 2-Butanol
Kata Kunci Pencarian:
2 Butanol - Alchetron, The Free Social Encyclopedia
2-Butanol | 19440 | Honeywell Research Chemicals
2-Butanol: Properties, Production And Uses
2-butanol Formula Estrutural Wholesale Savings | www.micoope.com.gt
2-Butanol | CAS 78-92-2 | SCBT - Santa Cruz Biotechnology
2-Phenyl-2-butanol | CAS 1565-75-9 | SCBT - Santa Cruz Biotechnology
Butanol H Nmr Spectrum
2-Butanol Grade: Technical Grade at Best Price in Mumbai | Antares Chem ...
2-Butanol Structure - C4H10O - Over 100 million chemical compounds | CCDDS
1-Butanol,2-ethyl-2-methyl- 18371-13-6 wiki
Production and properties of 2-Butanol_Chemicalbook
Draw the structure of the compound 2-butanol. | Homework.Study.com
2 butanol
Daftar Isi
Comparison of boiling points between 2‐butanol and isobutanol
May 16, 2022 · Which has higher boiling points among butan‐2‐ol (1) and 2‐methylpropan‐1‐ol (2)? I know that branching decreases the boiling points, but I want to know how position of substituents affects the me...
organic chemistry - Boiling points of Butan-2-ol and Butan-1-ol ...
Apr 16, 2023 · But in the case of 1-butanol, the molecule is linear while 2-butanol is not. This stereochemical difference affects the way the molecules attract each other. The linear molecules are able to come closer, thus creating stronger bonds or in other words raising the boiling point, because a higher amount of energy has to be applied in order for one ...
Synthesis of 2-Phenyl-2-Butanol from Grignard Reagent
Jan 25, 2015 · 2-Phenyl-2-Butanol can be synthesized by three different combinations of a grignard reagent and a ketone. Show each combination. I can only think of one. Butanone with Br-Mg-Ph; I can't think of anything else. I'm not too sure if this will work: phenylbutanone withe Br-Mg-Me. now i'm stuck. i can't think of the last one.
Calculating the percentage of (+)-2- butanol in the sample
Dec 14, 2020 · Specific rotation of (+)-2-butanol is 12.5 $^{\circ}$.A sample of 2-butanol containing both the enantiomers was found to have specific rotation value of –2.8 $^{\circ}$.
Synthesizing 2-methyl-2-butanol - Chemistry Stack Exchange
Aug 18, 2015 · Any trace of a secondary alcohol product (derived from a elimination without hydride shift), if isolable, could be added to a reaction environment described in the first step, as it would easily convert to a trisubstituted alkene, that via Markovnikov hydration, again, gives 2-Methyl-2-butanol.
How to prepare 2-bromobutane from 1-butanol? [closed]
So my answer (g then b) was incorrect. I thought that the bulky strong base of b would do E2 on 2-bromobutane, making it but-1-ene, then just add $\ce{HBr}$.
How to convert 2-propanol to 2-butanol? - Chemistry Stack …
Jun 11, 2016 · Can someone confirm that this is a correct way to make 2-butanol starting from 2-propanol? First add Cl2 and UV-light to it to become 1-chloro-2-propanol. Make from CH3Cl a Grignard reagent by adding Mg and dry ether. Let a nucleophile substitution happen between CH3MgCl and 1-chloro-2-propanol. You get 2-butanol?
Why does CH3CH (OH)CH2CH3 give iodoform test?
The substrate you have provided (2-butanol) would indeed give a positive test. The iodoform test is performed in presence of iodine and potassium or sodium hydroxide, which first oxidizes the aforesaid compound to 2-Butanone.
Why is this named 3-phenyl-2-butanol instead of 2-phenyl-3 …
Jan 6, 2019 · Why is the following compound named 3-phenyl-2-butanol and not 2-phenyl-3-butanol? Does the alcohol or the phenyl group have priority?
Rate of dehydration for butan-2-ol and butane-2,3-diol
Jul 21, 2020 · 2-butanol dehydrates to give but-2-ene Butane-2,3-diol dehydration is nicely described in this paper from Emerson 1 : Aqueous 2,3-butanediol was shown to react in a pseudo-first-order reaction in the presence of sulfuric acid to form methyl ethyl ketone.