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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 53, Number 5
JKCSEZ 53(5)
October 20, 2009 

 
Title
Synthesis and Spectroscopic Investigations of Some New Organotelluronium Salts Based on Dicyclohexyl Telluride

디시클로헥실 텔루르염에 기반한 유기텔루로늄염의 합성과 분광학적 분석
Author
Ali Z Al Rubaie*, Dhafir M H Al Mudhaffar, Ali H Al Mowali, Kahtan A Asker

Ali Z Al Rubaie*, Dhafir M H Al Mudhaffar, Ali H Al Mowali, Kahtan A Asker
Keywords
디시클로헥실 텔루르염, 텔루로늄염, 환원성 제거, 산화성 첨가, Tetraphenylborate , Dicyclohexyl telluride, Telluronium salts, Reductive elimination, Oxidative addition, Tetraphenylborate
Abstract
디시클로헥실 텔루르염은 에탄올 수용액에서 NaTeH와 디시클로헥실 브롬화물의 반응에 의해 높은 수율로 얻어진다. 일반식 (cyclo-C6H11)2Te(R)X (where R = CH3, X = I (1); R = C2H5, X = Br(2); R = C2H5, X = I (3); R = C3H5, X = Br (4)) 인 유기텔루로늄의 새로운 시리즈는 그에 상응하는 알킬 할로겐화물과 (cyclo-C6H11)2Te의 반응에 의해 만들어진다. NaBPh4와 1의 반응은 78% 수율로 화합물 5를 제공하였다. 벤질 브롬화물과 (cyclo-C6H11)2Te, 4-bromophenacyl bromide의 반응에서는 뜻밖에 각각dibenzylcyclohexyltelluronium 브롬화물과 and bis(4-bromophenacyl)cyclohexyltelluronium bromide을 얻었다. 높은 수율의 tetraphenylborate 유도체는 NaBPh4과 6의 반응으로 얻었다. CDCl3용매에서 1H NMR분석을 통해 화합물 1 이 알킬 할로겐화물의 제거 반응을 일으킴을 확인할 수 있었다. 새로운 화합물은 전도성, IR, 1H와13C NMR, 열분석를 통해 규명되었다.

Dicyclohexyl telluride was obtained in a high yield by the reaction of cyclohexyl bromide with NaTeH(prepared in situ) in an aqueous ethanolic solution. A series of new organotelluronium salts of the general formula (cyclo-C6H11)2Te(R)X (where R = CH3, X = I (1); R = C2H5, X = Br(2); R = C2H5, X = I (3); R = C3H5, X = Br (4)) were prepared by the reaction of (cyclo-C6H11)2Te with the corresponding alkyl halide. Reaction of 1 with NaBPh4 gave compound 5 ( i.e. R = CH3, X = BPh4 ?) in 78% yield. Reaction of (cyclo-C6H11)2Te with benzyl bromide and 4-bromophenacyl bromide gave unexpectedly dibenzylcyclohexyltelluronium bromide (6) and bis(4-bromophenacyl)cyclohexyltelluronium bromide (7), respectively. Reaction of 6 with NaBPh4 gave the corresponding tetraphenylborate derivative (8) in high yield. 1H NMR studies revealed that in CDCl3solution compound 1 eliminated alkyl halide. Conductivity, IR, 1H and 13C NMR and thermal data for the new compounds are presented and discussed.

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530 - 535
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