MIT 5 311 - THE PREPARATION OF FERROCENE & ACETYLFERROCENES (20 pages)

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THE PREPARATION OF FERROCENE & ACETYLFERROCENES



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THE PREPARATION OF FERROCENE & ACETYLFERROCENES

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Pages:
20
School:
Massachusetts Institute of Technology
Course:
5 311 - Introductory Chemical Experimentation

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WARNING NOTICE The experiments described in these materials are potentially hazardous and require a high level of safety training special facilities and equipment and supervision by appropriate individuals You bear the sole responsibility liability and risk for the implementation of such safety procedures and measures MIT shall have no responsibility liability or risk for the content or implementation of any of the material presented Legal Notice Experiment 4 The Preparation of Ferrocene Acetylferrocene MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Chemistry 5 311 Introductory Chemical Experimentation EXPERIMENT 4 THE PREPARATION OF FERROCENE ACETYLFERROCENES1 I Purpose The principal aims of this experiment are to provide background information about and experience in the synthesis and electronic structure of ferrocene 1 h5 C5H5 2Fe bis pentahaptocyclopentadienyl iron 2 the synthesis of an ionic liquid as environment for the acetylation of ferrocene the use of inert atmospheres including glove box techniques recrystallization or sublimation the use of GC MS and thin layer chromatography as analytical tools and column chromatography as a purification technique the concepts of Green Chemistry such as Atom Economy3 and alternative non polluting solvents Ferrocene is a historically important molecule The initial recognition of the structure of C10H10Fe in 19514 spawned a vast area of chemistry viz transition metal organometallic chemistry This field is still developing and has produced a huge number of compounds in which saturated unsaturated and aromatic organic fragments are bonded directly to metals All carbon atoms in the two cyclopentadienyl rings are equally bonded to the central ion by p electrons in the rings The sandwich structure proposed by Wilkinson and Fischer5 6 Nobel prize in 1973 in early 1 Mircea D Gheorghiu designed the experiment to include the acetylation of ferrocene in ionic liquid The word hapto means in Greek to fasten Pentahapto therefore



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