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  • Essay / History of lead and organoledric compounds - 935

    Organoledric compoundsI. Context. Lead: A brief history [1]i. Organolelead refers to lead attached to at least one carbon ii. Lead was used in the past and first appeared around 3000 BC. iii. Received a bad reputation due to its toxicity, particularly tetraethyl lead. iv. Lead poisoning from paint first discovered-1904b. General properties: physical and chemical [1], [2], [3]i. Bluish gray, soft ii. Occurs naturally iii. General synthesis routes: from metal such as Grignard reagents or from other reactions. [3][3]Catalytic properties[3]Stabilization properties[3] iv. Tarnishes on exposure to air. organoToxic lead1. High levels required2. No obvious symptoms vi. Generally not soluble in water vii. Stored in the bones and tissues of the body viii. Non-corrosive when using acid ix. Will corrode many things. Uses: Past and Present [1], [2], [3] Lead and organoledramatic compounds have had wide-ranging uses since their discovery in 3000 BC. Lead has been found in decorative sculptures and weapons from past civilizations. It is still used today for bullets. Before lead was known for its toxic properties, it was most commonly identified and known for its use as a base for paints. Lead has been identified in things like roofing and pipes. Today, lead is most commonly used as a radiation shield for x-ray machines. It is also used for electrodes in electrolysis. It is also found as a component in lead-acid batteries used in automobiles. Organoledic compounds such as tetraethyl lead were once used as antiknock agents, added to gasoline. This practice ceased once the toxic and derogatory effects on humans and the environment were discovered. While organoledric compounds suffer from bad publicity due to their toxic nature, there are avenues to move away from this and come up with new methods. Look at Pb(thd) 2 as a replacement for tetraethyl lead. I found that with ozone it could be used for the growth of thin PbO2 films with low H and CV impurities. The future of organoledric compoundsa. As an antimicrobial agent [10]i. Due to antibiotic resistance, new compounds are needed ii. iii. Review of fungicide studies, bacterial studies, and tuberculosis-like diseases. iv. Concluded that the antibacterial properties could be improved and would certainly possess antimicrobial properties.v. The lead complexes in the antimyco were effective in killing tuberculosis microorganismsb. As a sensitizer in photovoltaic cells [11], [12]Photovoltaic cells used for the conversion of light to energy seeking to overcome low absorption coefficients and narrow absorption bands. Effectively sensitized titanium oxide. Including spectral reactivity Capable of high photovoltages