Jer-Jye Chiu

Peri interaction between selenium atoms in dinaphtho[1,8-b,c]-1,5-diselenocin and 1,8-bis(methylseleno)naphthalene

Abstract A new symmetrical diseleno peri -bridged naphthalene, dinaphtho[1,8- b,c ]-1,5-diselenocin ( 1 ), and 1,8-bis(methylseleno)naphthalene ( 2 ) have been synthesized. The cyclic voltammogram of 1 and 2 showed one reversible oxidation peak with remarkably low oxidation potential. Selenide 1 in CHCl 3 under air and scattered light undergoes oxidation to give the corresponding Se -oxide 11 . The peri selenium-selenium interaction of 1 and 2 was found in electrochemical oxidation, in concentrated sulfuric acid, and in EI mass spectrum.

Transannular interaction between selenium and sulfur atoms in 5H,7H-dibenzo[b,g][1,5]selenathiocin: Formation of a new heteroatom dication [>Se+−+S<]

Abstract A new medium-sized heterocycles, 5H,7H-dibenzo[ b,g ][1,5]selenathiocin ( 1 ) has been prepared. The transannular interaction between selenium and sulfur atoms in 1 and the formation of dication were found in the reaction of 1 , and its oxides with concd H 2 SO 4 .

Synthesis of a new type of quadruply ortho-bridged biphenyl compounds with disulfide linkage, and its sulfur extrusion in concentrated H2SO4 and photochemical condition

A new methanodithiomethano-bridged dibenzotrithionin (1) has been synthesized. The electrochemical oxidation of 1 and its analogous compound was studied by cyclic voltammetry. A new type of the sulfur extrusion of 1 was found in the reaction of 1 with concd H2SO4 or 2 equiv of NOPF6 and in its photochemical reaction.

A new double bond bridged dibenzodithiocin: Preparation, characterization, and its transannular pπ-(>S+S+) interaction

A new heterocyclic compound, 1,11-(etheno)-5H,7H-dibenzo[b,g][1,5]dithiocin (1) has been prepared by treatment of mono-sulfonium salt of 1,11-(methanothiomethano)-5H,7H-dibenzo[b,g][1,5]dithiocin with t-BuOK in a one step; the reactivities and the transannular pπ-(>S+S+<) interaction in 1 are described.

New evidence for intramolecular sulphur–sulphur interaction in 2,6-bis(methylthiomethyl)phenyl phenyl sulphide

Evidence for intramolecular sulphur–sulphur interaction between the three sulphur atoms of 2,6-bis(methylthiomethyl)phenyl sulphide was found in the reactions of the corresponding sulphoxides with conc. H2SO4 and in electrochemical oxidation.

Formation of new hydroxyselenonio and hydroxyammonio-selenuranes from reaction of Se-oxides of 5H,7H-dibenzo[b,g][1,5]diselenocine and N-methyl-5H,7H-dibenzo[b,g][1,5]selenazocine with silyl triflates

The transannular reaction of 5H,7H-dibenzo [b,g][1,5] diselenocine Se-oxide 1 or N-methyl-5H,7H-dibenzo[b,g][1,5]selenazocine Se-oxide 2 with 1 equiv. of silyl triflates, CF3SO3SiMe3 and CF3SO3SiMe2But, produced a new hypervalent selenurane which consists of two Unsymmetrical apical ligands such as the hydroxy group and the selenonio or ammonio group.

A new preparative method and reactivity of diselenide dication salt from 5H,7H-dibenzo[b,g][1,5]diselenocine

A new medium-sized heterocycle, 5H,7H-dibenzo[b,g][1,5]diselenocine 1, has been synthesized; the reaction of the selenoxide of 1 with two equivalents of CF3SO3SiMe3 gave the stable diselenide dication salt, this is a new method for the preparation of the diselenide dication.