Carbon asimetric

În chimia organică, termenul de carbon asimetric (carbon chiral) face referire la un atom de carbon care formează patru legături cu patru atomi sau grupe de atomi diferite.^[1]^[2] Conform regulii Le Bel-van't Hoff rule, numărul de stereoizomeri ai unui compus organic este egal cu 2ⁿ, unde n reprezintă numărul de atomi de carbon asimetrici care se află în molecula compusului.^[3]

Exemple

De exemplu, acidul malic are o catenă formată din patru atomi de carbon, dar doar unul dintre aceștia este asimetric. Atomul de carbon asimetric este legat de alți doi atomi de carbon, un atom de oxigen și un atom de hidrogen. În ciuda legăturii pe care o formează cu alți doi atomi de carbon, aceștia fac parte din grupe diferite de atomi:

O tetroză ce conține 2 atomi de carbon asimetrici are 2² = 4 stereoizomeri:

O aldopentoză ce conține 3 atomi de carbon asimetrici are 2³ = 8 stereoizomeri:

O aldohexoză ce conține 4 atomi de carbon asimetrici are 2⁴ = 16 stereoizomeri:

Vezi și

Chiralitate (chimie)

Referințe

^ Stereochemistry of Organic Compounds Ernest L. Eliel, Samuel H. Wilen
^ IUPAC definition http://goldbook.iupac.org/A00479.html
^ „Le Bel-van't Hoff rule”. TheFreeDictionary's Medical dictionary.

Read other articles:

Daftar Perdana Menteri Barbados

Berikut merupakan daftar kepala pemerintahan Barbados.. Kantor Perdana Menteri Barbados (c.a. November 2000) Berikut adalah daftar pejabat dan mantan pejabat kepala pemerintahan Barbados. Pada masa pra-kemerdekaan dikenal dengan Premier (Menteri Utama) dan ketika merdeka dikenal dengan Perdana Menteri. Premier (Menteri Utama) Pejabat Periode jabatan Afiliasi politik Mulai menjabat Akhir jabatan Grantley Herbert Adams 1 Februari 1954 17 April 1958 Partai Buruh Barbados Hugh Gordon Cummins 17 A...

Eugoides ulrichi

Artikel ini sebatang kara, artinya tidak ada artikel lain yang memiliki pranala balik ke halaman ini.Bantulah menambah pranala ke artikel ini dari artikel yang berhubungan atau coba peralatan pencari pranala.Tag ini diberikan pada Januari 2023. Eugoides ulrichi Klasifikasi ilmiah Kerajaan: Animalia Filum: Arthropoda Kelas: Insecta Ordo: Coleoptera Famili: Cerambycidae Genus: Eugoides Spesies: Eugoides ulrichi Eugoides ulrichi adalah spesies kumbang tanduk panjang yang tergolong famili Ceramby...

Distrik di Libya

Dua puluh dua distrik (shabiya) di Libya saat ini (sejak tahun 2007) Distrik adalah wilayah administratif tingkat satu di Libya. Lihat pula ISO 3166-2:LY lbsDistrik di Libya sejak 2007Al Bayda · Al Butnan · Al Jabal al Akhdar · Al Jabal al Gharbi · Al Jfara · Al Jufrah · Al Kufrah · Al Marj · Al Murgub · An Nuqat al Khams · Al Wahat · Az Zawiyah · Benghazi �...

Shraddha Kapoor

Shraddha KapoorKapoor di Lakme Fashion Week, 2017Lahir03 Maret 1987 (umur 37)[1]Mumbai, Maharashtra, IndiaKebangsaanIndianPekerjaanPemeranPerancangPenyanyiPembuat lirikTahun aktif2010–sekarangKerabatLihat Keluarga Mangeshkar-Burman Shraddha Kapoor (lahir 3 Maret 1987) adalah seorang pemeran dan penyanyi asal India yang berkarya dalam perfilman Hindi. Putri dari pemeran Shakti Kapoor ini memulai karier aktingnya dengan peran singkat dalam film tahun 2010 Teen Patti, dan me...

Ali Ahmad

Ali Ahmad Anggota Dewan Perwakilan Rakyat Republik IndonesiaPetahanaMulai menjabat 1 Oktober 2019PresidenJoko WidodoKetua DPRPuan MaharaniDaerah pemilihanJawa Timur VMayoritas47.507 (2019) Informasi pribadiLahir1 Januari 1967 (umur 57)Gondanglegi, MalangPartai politikPKBSuami/istriAnik ZuliyahAnak3Alma materUniversitas Islam MalangPekerjaanPolitikusSunting kotak info • L • B H. Ali Ahmad, S.H. atau akrab dipanggil Gus Ali (lahir 1 Januari 1967) adalah politikus Indonesi...

Great Appalachian Storm of 1950

Extratropical cyclone that struck the Eastern United States in 1950 Great Appalachian Storm of November 1950Category 5 Extreme (RSI/NOAA: 34.69)Surface analysis showing cyclone near time of maximum intensity on November 25, 1950 TypeExtratropical cycloneNor'easterBlizzardWinter stormFormedNovember 24, 1950[1]DissipatedNovember 30, 1950 Lowest pressure978 mbar (28.88 inHg) Maximum snowfallor ice accretion57 inches (1,400 mm) Fatalities383 fatalitiesDamage$...

Wrestling at the 2012 Summer Olympics – Men's Greco-Roman 96 kg

Men's Greco-Roman 96 kgat the Games of the XXX OlympiadVenueExCeL LondonDate7 August 2012Competitors19 from 19 nationsMedalists Ghasem Rezaei Iran Rustam Totrov Russia Artur Aleksanyan Armenia Jimmy Lidberg Sweden← 20082016 → Wrestling at the2012 Summer OlympicsQualificationFreestyleGreco-RomanWomen55 kg55 kg48 kg60 kg60 kg55 kg66 kg66 kg63 kg74 kg74 kg72 kg84 kg84 kg96 kg96 kg120 kg120 kgvte Main article: Wrestling at the 2012 Summer O...

Staind

American rock band StaindStaind live at the LEC in Laredo, Texas, in 2009Background informationOriginSpringfield, Massachusetts, U.S.Genres Nu metal hard rock post-grunge alternative metal Years active 1995–2012 2014 2017 2019–present Labels Flip Elektra Atlantic Roadrunner BMG Members Aaron Lewis Mike Mushok Johnny April Sal Giancarelli Past members Jon Wysocki Websitestaindofficial.com Staind (/steɪnd/ STAYND) is an American rock band from Springfield, Massachusetts, formed in 1995. Th...

FIBA Basketball World Cup qualification

The FIBA Basketball World Cup qualification is the process that a national basketball team goes through to qualify for the FIBA Basketball World Cup finals. Qualifiers are held within four FIBA continental zones Africa, Americas, Europe, and Asia-Oceania play in a combined Asia-Pacific region to qualify for the FIBA Basketball World Cup, which are organized by their respective confederations. One extra berth is allocated for the specific continental zone that hosts the event, in addition to t...

Žiar nad Hronom District

This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Žiar nad Hronom District – news · newspapers · books · scholar · JSTOR (September 2009) (Learn how and when to remove this template message) District in Banská Bystrica Region, SlovakiaŽiar nad Hronom DistrictDistrictCountrySlovakiaRegion (kraj)Banská Bystrica RegionCultural...

Sargon II

Ukiran timbul berbahan alabaster menggambarkan Raja Sargon II. Ukiran ini ditemukan di istana Raja Sargon II di Dur-Sharrukin. Kini ukiran ini terpajang di Museum Irak. Sargon II (bahasa Akadia Šarru-kên raja yang benar, Ibrani: סרגון, sar·ḡō·wn; berkuasa 722 – 705 SM) adalah raja Asyur. Sargon II menjadi penguasa bersama dengan Salmaneser V pada tahun 722 SM dan menjadi penguasa satu-satunya atas kerajaan Asyur pada tahun 722 SM setelah wafatnya Salmaneser. Tidak jelas apak...

Let It Rain (Tinchy Stryder song)

2011 single by Tinchy Stryder Let It RainSingle by Tinchy Stryder featuring Melanie Fionafrom the album Third Strike Released27 January 2011Recorded2010GenreR&BelectronicLength3:40Label Takeover Entertainment Limited Universal Island Composer(s)Kwasi Danquah IIILyricist(s) Emeli Sandé Melanie Fiona Producer(s)Nathan RetroTinchy Stryder singles chronology Game Over (2010) Let It Rain (2011) Bring It (2011) Melanie Fiona singles chronology Gone and Never Coming Back(2011) Let It Ra...

Battle of Ascalon

For the siege and capture of Ascalon in 1153, see Siege of Ascalon. 1099 final battle of the First Crusade Battle of AscalonPart of the First CrusadeBataille d'Ascalon, 12 août 1099 (oil on canvas by Jean-Victor Schnetz, 1847), Salles des Croisades, Palace of VersaillesDate12 August 1099LocationAscalon, Fatimid Caliphate31°40′14″N 34°33′29″E / 31.67056°N 34.55806°E / 31.67056; 34.55806Result Crusader victory[1] Fatimid army retreats to Egypt End of...

Catherine Cadière

Artikel ini perlu diwikifikasi agar memenuhi standar kualitas Wikipedia. Anda dapat memberikan bantuan berupa penambahan pranala dalam, atau dengan merapikan tata letak dari artikel ini. Untuk keterangan lebih lanjut, klik [tampil] di bagian kanan. Mengganti markah HTML dengan markah wiki bila dimungkinkan. Tambahkan pranala wiki. Bila dirasa perlu, buatlah pautan ke artikel wiki lainnya dengan cara menambahkan [[ dan ]] pada kata yang bersangkutan (lihat WP:LINK untuk keterangan lebih lanjut...

National Register of Historic Places listings in Pike County, Missouri

Location of Pike County in Missouri This is a list of the National Register of Historic Places listings in Pike County, Missouri. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Pike County, Missouri, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map.[1] There are 21 properties and districts listed on the...

Aq Bolagh Castle

Castle in Lorestan Province, Iran Aq Bolagh castleقلعه آقبلاغGeneral informationTypeCastleTown or cityBorujerd CountyCountry IranAq Bolagh castle (Persian: قلعه آقبلاغ) is a historical castle located in Borujerd County in Lorestan Province, The longevity of this fortress dates back to the Qajar dynasty.[1][2] References ^ قلعه ای تاریخی در دل روستایی سرسبز/ ذخیره گاه درختان کمیاب بروجرد میزبان گر�...

Deán Borges

Questa voce sull'argomento cestisti portoricani è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Deán Borges Nazionalità Stati Uniti Porto Rico Altezza 196 cm Peso 100 kg Pallacanestro Ruolo Ala piccola Termine carriera 2006 CarrieraGiovanili 1986-1991 Wagner SeahawksSquadre di club 1986-1987 Marat. de Coamo561989-1995 Marat. de Coamo2131996-1997 Avan. de Villalba631998&...

All the Love in the World (lagu The Corrs)

All the Love in the WorldLagu oleh The Corrsdari album In BlueDirilis17 Juni 2001FormatSingel promosiDirekam2000GenrePop rock, soft rockDurasi4:22 (album)3:55 (remix Mutt Lange)LabelWEA InternationalPenciptaRobert John Mutt Lange Andrea Corr Caroline Corr Jim Corr Sharon CorrProduserRobert John Mutt Lange All the Love in the World adalah lagu grup musik pop rock Irlandia The Corrs dalam album studio ketiganya, In Blue (2000). Lagu ini dirilis tahun 2001 sebagai singel promosi untuk film komed...

阿尔马桑多斯布齐奥斯

此條目没有列出任何参考或来源。 (2021年4月24日)維基百科所有的內容都應該可供查證。请协助補充可靠来源以改善这篇条目。无法查证的內容可能會因為異議提出而被移除。阿尔马桑多斯布齐奥斯Armação dos Búzios市镇阿尔马桑多斯布齐奥斯在巴西的位置坐标：22°44′49″S 41°52′55″W / 22.7469°S 41.8819°W / -22.7469; -41.8819国家巴西州里约热内卢州面积 • ...

Royal Society of Arts

British organisation FRSA redirects here. For other uses, see FRSA (disambiguation). The article's lead section may need to be rewritten. Please help improve the lead and read the lead layout guide. (August 2023) (Learn how and when to remove this message) Royal Society of ArtsRoyal Society for the Encouragement of Arts, Manufactures and CommerceAbbreviationRSAEstablished1754; 270 years ago (1754)FounderWilliam ShipleyFounded atLondon, EnglandTypeRegistered charity[1]...