FERROCENE AND ITS TECHNOLOGICAL APPLICATION


Ferrocene is an organometallic complex with formular Fe(C5H5)2 , it was first discovered accidentally in 1940s by process technicans inspecting pipes at a union carbide cracker. it was reported by two group of scientists in late 1951 and early 1952 independently,The discovery and characterisation of the structure of ferrocene, Fe(C5H5)2 in the early 1950's, led to an explosion of interest in d-block metal carbon bonds and brought about development and the now flourishing study of organometallic chemistry. Until this report organometallic complex were restricted to grignard reagent (R-MgBr), zeise's salt and few others. This caused argument between chemists since no stable molecule composed of only transition metal and hydrocarbons, it was like someone that is used to seeing monkeys, ants and other domestic animals then eventually sees an elephant or gorilla. In the attempt to explain this compound its structure was proposed.

STRUCTURE OF FERROCENE
So many structures where proposed by scientists, but each is replaced with evolution or evidence in researches. Here are some of the structures as proposed by different scientists.


- The first structure was proposed by miller et al where he depicted the structure to be just ionic in nature




 - The second one was proposed by wilkinson et al and was attributed to the aromatic character of the organoiron compound, it also obeys the huckel rule.


The third structure is the sandwich structure




TECHNOLOGICAL APPLICATIONS OF FERROCENE
Ferrocene is a vital part of the small electronic device that measures blood sugar level. these device use exactly the same enzyme that oxidizes glucose in the body, glucose oxidase, but kept together by making it inform of a solution. when one glucose molecule has been oxidized, the enzyme has taken up a pair of electron from the glucose and needs to get ride of them before it can take on another glucose molecule. the device does this with two ferrocenium cation. So for every glucose molecule in the blood sample to re-oxidize the enzyme, two ferrocenium cations are turned into ferrocene. To regenerate the original ferrocenium cations the device passes an electric current between two electrodes, electrolysing the the ferrocene. the device measures the current and converts it to micro-moles of glucose per litter of the blood on the display.

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