Preparation of Highly Reactive Electrogenerated Zinc
DOI:
https://doi.org/10.11113/jt.v41.702Abstract
Logam zink berkereaktifan tinggi yang dihasilkan secara elektrolisis (EGZn/Naph) disediakan dengan mudah dalam larutan N,N–dimetilformamida (DMF) yang mengandungi naftalena dan elektrolit penyokong di dalam sebuah sel yang telah dipasang siap dengan katod platinum dan anod zink. EGZn/Naph ini adalah agregat zarah sangat halus yang lebih kecil berbanding logam zink komersial ataupun zink yang dihasilkan secara elektrolisis biasa (EGZn). Kereaktifan zink berkereaktifan tinggi ini dibuktikan dengan transformasi bromoalkana kepada organozink bromida yang berkesan, yang tidak boleh dicapai dengan menggunakan zink biasa mahupun logam EGZn. Reaksi ganding silang organozink bromida ini dengan iodobenzena mudah berlaku dalam kehadiran mangkin paladium untuk menghasilkan produk terganding silang, etil 4–fenilbutanoata sebanyak 96%. Kata kunci: Elektrolisis, reaktif zink, naftalena, bromoalkana, organozink kompoun Highly reactive electrogenerated zinc metal (EGZn/Naph) was readily prepared by the electrolysis of an N,N–dimethylformamide (DMF) solution containing naphthalene and a supporting electrolyte in a one–compartment cell fitted with a platinum cathode and a zinc anode. This EGZn/Naph is an aggregation of very fine particles which are much smaller in size than commercial zinc metal or the usual electrogenerated zinc (EGZn). The reactivity of this highly reactive zinc was elucidated by the efficient transformation of bromoalkane into the corresponding organozinc bromide, which cannot be achieved by the use of both usual zinc or EGZn metals. Subsequent cross–coupling reaction of the organozinc bromide with iodobenzene readily took place in the presence of a palladium catalyst to give the corresponding cross–coupled product, ethyl 4–phenylbutanoate in 96% yield. Key words: Electrolysis, reactive zinc, naphthalene, bromoalkanes, organozinc compound.Downloads
Published
2012-02-25
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Science and Engineering
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How to Cite
Preparation of Highly Reactive Electrogenerated Zinc. (2012). Jurnal Teknologi, 41(1), 37–44. https://doi.org/10.11113/jt.v41.702