Syn and anti addition and A Life of Contrasts: Difference between pages
(Difference between pages)
Content deleted Content added
m Reverted edits by 82.30.84.39 to last version by Freestyle-69 (HG) |
mNo edit summary |
||
| Line 1: | Line 1: | ||
{{infobox Book | <!-- See [[Wikipedia:WikiProject Novels]] or [[Wikipedia:WikiProject Books]] --> |
|||
[[Image:syn_anti.PNG|frame|right|[[Ethylene]] undergoing syn and [[anti addition]]]] |
|||
| name = A Life of Contrasts |
|||
| title_orig = |
|||
| translator = |
|||
| image = <!--prefer 1st edition--> |
|||
| image_caption = |
|||
| author = [[Diana Mitford]] |
|||
| illustrator = |
|||
| cover_artist = |
|||
| country = [[United Kingdom]] |
|||
| language = [[English language|English]] |
|||
| series = |
|||
| genre = [[Autobiography]] |
|||
| publisher = [[Times Books]] |
|||
| release_date = 1977 |
|||
| english_release_date = |
|||
| media_type = Print ([[Hardcover|Hardback]] & [[Paperback]]) |
|||
| pages =296 |
|||
| isbn = |
|||
| preceded_by = |
|||
| followed_by = ''Loved Ones'' |
|||
}} |
|||
'''''A Life of Contrasts: The Autobiography of Diana Mitford Mosley''''' by [[Diana Mitford]] was published by [[Times Books]] in [[1977]]. In the book, she recounts her relationship with controversial political figures such as [[Sir Oswald Mosley]], founder of the [[British Union of Fascists]] whom she married as well as her association with leading [[Nazi]] figures. |
|||
In [[organic chemistry]], '''syn and anti addition''' are different ways in which two substituents can be added to a [[double bond]] or [[triple bond]]. This article will use alkenes as examples. |
|||
Syn addition is the addition of two [[substituent]]s to the same side (or ''face'') of a [[double bond]] or [[triple bond]], resulting in a decrease in [[bond order]] but an increase in number of substituents. Generally the [[Substrate (chemistry)|substrate]] will be an [[alkene]] or [[alkyne]]. An example of syn addition would be the oxidation of an [[alkene]] to a diol via a suitable oxidising agent such as OsO<sub>4</sub> or KMnO<sub>4</sub>. |
|||
==External links== |
|||
Anti addition is in direct contrast to syn addition. In anti addition, two substituents are added to opposite sides (or faces) of a double bond or triple bond, once again resulting in a decrease in bond order but an increase in number of substituents. The classical example of this is bromination of alkenes. |
|||
* [http://www.independent.co.uk/arts-entertainment/books/features/the-two-faces-of-diana-mosley-the-indestructible-536307.html The two faces of Diana Mosley the indestructible] |
|||
{{DEFAULTSORT:Life of Contrasts, A}} |
|||
Depending on the substrate double bond, addition can have different effects on the molecule. After addition to a [[alkane|straight-chain]] alkene such as [[Ethene|C<sub>2</sub>H<sub>4</sub>]], the resulting alkane will rapidly and freely rotate around its single [[sigma bond]] under normal conditions (i.e. [[room temperature]]). Thus whether substituents are added to the same side (syn) or opposite sides (anti) of a double can usually be ignored due to free rotation. However, if [[Chirality (chemistry)|chirality]] or the specific absolute orientation of the substituents needs to be taken into account, knowing the type of addition is significant. Unlike straight-chain alkenes, [[cycloalkane|cycloalkene]] syn addition allows stable addition of substituents to the same side of the ring, where they remain together. The cyclic locked ring structure prevents free rotation. |
|||
| ⚫ | |||
[[Category: Autobiographies]] |
|||
Syn elimination and anti elimination are the reverse processes of syn and anti addition. These result in a new double bond, such as in [[Ei mechanism|Ei elimination]]. |
|||
| ⚫ | |||
[[Category:Addition reactions]] |
|||
[[de:Syn-anti-Notation]] |
|||
[[es:Adición anti]] |
|||
[[fr:Syn]] |
|||
[[id:Adisi sin dan anti]] |
|||
Revision as of 18:45, 12 October 2008
| Author | Diana Mitford |
|---|---|
| Country | United Kingdom |
| Language | English |
| Genre | Autobiography |
| Publisher | Times Books |
Publication date | 1977 |
| Media type | Print (Hardback & Paperback) |
| Pages | 296 |
| Followed by | 'Loved Ones |
A Life of Contrasts: The Autobiography of Diana Mitford Mosley by Diana Mitford was published by Times Books in 1977. In the book, she recounts her relationship with controversial political figures such as Sir Oswald Mosley, founder of the British Union of Fascists whom she married as well as her association with leading Nazi figures.