| | | |
| |
| |||||||
 |
| | LinkBack | خيارات الموضوع | طريقة العرض |
|
#1
2008-03-12, 03:42 PM
| |||
| | |||
| اللي يقدر يساعدني ياليت يتكرم ويدخل انا طالبه في قسم الكيمياء وعندي بحث تخرج مو عارفه اطلع اي شيء من النت ولا من مجلات علميه بحثي في الكيمياء العضويه عن AMIDINIUM SALTS  |
| عدد 2 من الطلاب تقدموا بالشكر لكاتب الموضوع دلوعه ابوها علي هذه المشاركة الطيبة : | ||
ابن العراق (2008-03-12), اسماعيلو (2008-03-12) | ||
|
#2
2008-03-12, 08:01 PM
| |||||||||||||||||||||||
| | |||||||||||||||||||||||
Please try A New Binding Motif for Amidinium Cations – Strong Binding of Amidinium Salts with m-Xylylene Bisphosphonate Moieties Thomas Grawe,a Thomas Schrader*b http://pages.unibas.ch/mdpi/ecsoc-4/c0027/c0027.htm also try http://en.wikipedia.org/wiki/Amidinium http://dissertations.ub.rug.nl/FILES...talhout/c2.pdf Also try this link http://www.orgsyn.org/orgsyn/prep.asp?prep=cv6p0492 and make a search on http://www.orgsyn.org/ Please also see the attached 3 pdf files hope it is yseful |
|
#4
2008-03-15, 01:16 AM
| |||
| | |||
| شكرا جزاك الله خير وانشا الله تكون لك في موازين حسناتك |
|
#5
2008-03-15, 02:09 AM
| ||||
| | ||||
| Quaternary Ammonium Salts (Best Synthetic Methods) (Hardcover) by R. Alan Jones  Book Description This text provides experimental methods for a wide range of organic reactions, systematically arranged according to reaction type, and describes the advantages and limitations of the procedures. Traditional methods to speed up organic reactions involve energy-consuming processes and costly and environmentally "unfriendly" solvents. Additionally, isolation of the product requires energy and time-consuming purification processes. A simple solution, especially for reactions involving anionic reactants, is the use of phase-transfer catalysis. Quaternary ammonium cations have the ability to transfer the anionic reactants as non-solvated ion-pairs from aqueous media into organic media. The resultant effect is to increase the rate of the organic reaction by enhancing the reactivity of the anionic species and increasing the encounter rate with the organic substrate. Side reactions are frequently eliminated so that the overall yield of the desired product is increased. Quaternary Ammonium Salts presents procedures for reducing reaction times and the need for extreme conditions, which are frequently encountered under standard reaction procedures. This is the only book to be published on quaternary ammonium salts. Best Synthetic Methods volumes allow the practicing synthetic chemist to choose between all the alternatives and assess their real advantages and limitations. Each volume of the series deals with a particular topic from a practical point of view, giving detailed examples and precise experimental directions and hints. With the emphasis on laboratory use, these volumes represent a comprehensive and practical guide to modern synthetic organic chemistry. About the Author R. Alan Jones is a Senior Fellow at the University of East Anglia, where he held the position of Dean of the School of Chemical Sciences until 1997. He spent a period on the Faculty at the University of Adelaide, holds a Sc.D. and Ph.D. from the University of Cambridge and a degree from the University of Oxford. Download from here http://rapidshare.com/files/59817470/4ehjdf85.rar.html |
|
#6
2008-03-16, 02:03 AM
| |||
| | |||
| شكرا اخوي جبار على مساعدتك |
|
| مواقع النشر (المفضلة) |
| يتصفح الموضوع حالياً : 1 (0 عضو و 1 ضيف) | |
| خيارات الموضوع | |
| طريقة العرض | |
|
|
مواضيع مشابهة للموضوع: اللي يقدر يساعدني ياليت يتكرم ويدخل | ||||
| الموضوع | الكاتب | القسم | الردود | آخر مشاركة |
| اللي يقدر يساعدني ياليت يدخل ويتكرم | نجوم | الكيمياء العامة | 3 | 2008-05-05 10:56 PM |
| لو سمحتوا اللي يقدر يساعدني يتفضل | دلوعه ابوها | الكيمياء العامة | 3 | 2008-03-21 06:26 PM |
| مين يقدر يساعدني ؟ | دلوعه ابوها | الكيمياء العامة | 2 | 2008-03-18 04:27 PM |
| ياليت اللي عنده خبره يساعدني | aBo YaRa | الهندسة الإلكترونية والكهربائية | 3 | 2007-03-15 03:29 AM |
النمط المتتابع
