title: 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.
abstract: A series of aromatic diacyl tellurides were prepared in moderate to good yields by the reactions of sodium orpotassium 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-MeOC(6)H(4)CO 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-MeOC(6)H(4)CO)(2)E (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].
authors.affiliation: Department of Chemistry, School of Engineering, Gifu University, Gifu, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Niyomura
authors.forename: Shoho
authors.initials: S
authors.lastname: Nakaiida
authors.forename: Ryo
authors.initials: R
authors.lastname: Yamada
authors.forename: Shinzi
authors.initials: S
authors.lastname: Kato
authors.forename: Masaru
authors.initials: M
authors.lastname: Ishida
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ebihara
authors.forename: Fumio
authors.initials: F
authors.lastname: Ando
authors.forename: Jugo
authors.initials: J
authors.lastname: Koketsu
mesh_terms: D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012492:Salts / Q000737:chemistry; D012643:Selenium / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D013691:Tellurium / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D012492:Salts; D013455:Sulfur; D012643:Selenium; D013691:Tellurium