Diaroyl Tellurides: Synthesis, Structure and NBO Analysis of (2-MeOC6H4CO)2Te – Comparison with Its Sulfur and Selenium Isologues. The First Observation of [MgBr][R(C=Te)O] Salts

Molecules

Osamu Niyomura¹  Shoho Nakaiida¹  Ryo Yamada¹  Shinzi Kato²  Masaru Ishida¹  Masahiro Ebihara¹  Fumio Ando² 

[1] Department of Chemistry, School of Engineering, Gifu University, Gifu, Japan;Department of Applied Chemistry, College of Engineering, Chubu University, Kasugai, Japan

关键词: diacyl telluride;    diacyl selenide;    diacyl sulfides;    Grignard reagent;    magnesium carbotelluroate;   

DOI  :  10.3390/molecules14072555

来源: mdpi

【 摘 要 】

A series of aromatic diacyl tellurides were prepared in moderate to good yields by the reactions of sodium or potassium arenecarbotelluroates with acyl chlorides in acetonitrile. X-ray structure analyses and theoretical calculations of 2-methoxybenzoic anhydride and bis(2-methoxybenzoyl) sulfide, selenide and telluride were carried out. The two 2-MeOC₆H₄CO moieties of bis(2-methoxybenzoyl) telluride are nearly planar and the two methoxy oxygen atoms intramolecularly coordinate to the central tellurium atom from both side of C(11)-Te(11)-C(22) plane. In contrast, the oxygen and sulfur isologues (2-MeOC₆H₄CO)₂E (E = O, S), show that one of the two methoxy oxygen atoms contacts with the oxygen atom of the carbonyl group connected to the same benzene ring. The structure of di(2-methoxybenzoyl) selenide which was obtained by MO calculation resembles that of tellurium isologues rather than the corresponding oxygen and sulfur isologues. The reactions of di(aroyl) tellurides with Grignard reagents lead to the formation of tellurocarboxylato magnesium complexes [MgBr][R(C=Te)O].

【 授权许可】

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© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.