Lab 2 O-Chem

Lab 2 O-Chem - Introduction: Formyl ferrocene is valuable...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Introduction: Formyl ferrocene is valuable compound in organic chemistry because it is a great compound to use when preparing chiral ligands (Tang). Formyl ferrocene is usually synthesized through a process called the Vilsmeier reaction, however; the yield achieved is very low. Instead of the Vilsmeier method, a new method with better yield was recentley developed in China and this new method was the purpose in this experiment. Whereas the former method relied on the reaction of foerrocene with disubstituted formamides and phophorus oxychloride, this new method was a reaction of ferrocene with triethyl orthoformate and aluminum chloride. It has been found that aromatic solvents were the best solvents to use when reacting with ferrocene (Tang), thus; toluene was the solvent of choice. The ending results of the experiment should yield the formyl ferrocene. In this experiment there were two previously used techniques implemented to analyze the ending results. The first analysis technique used was thin layer-chromatography. TLC is a useful tool where samples of different solutions are placed in one drop sizes at one end of a TLC plate and emersed in a solvent, toluene in this experiment, until the solvent almost reaches the other end. The Rf value is a quantative number that divides how far the spot traveled from the original drop by how far the solvent travelled. These Rf values are a basis of purity because when there are more substituents in a mixture, it is going to travel a different distance than the mixture. Knowing that, TLC can can be used to determine the purity of the finished product by comparing
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/15/2009 for the course CHM 238 taught by Professor Pruis during the Spring '08 term at ASU.

Page1 / 4

Lab 2 O-Chem - Introduction: Formyl ferrocene is valuable...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online