Oligoacetylenic sulfides

Gold–ruthenium compounds containing bridging phosphide or thiolate groups: Crystal structures of the intermediate species [Ru3(CO)8L(μ3-η2,η4,η3-{Me3SiCC(C2Fc)SC(Fc)CSCCSiMe3})] (L=NMe3 or PPh2H)

“…FAB mass spectra were carried out on a WG AutoSpec spectrometer, using 3-nitrobenzylalcohol as matrix. Me 3 SiC" CSC"CFc [12], [AuClPPh 3 ] [13] and [AuSRPPh 3 ] [R = Et, Ph] [14] were prepared as previously reported. Crystal data and structure refinement parameters for compounds 2 and 3 are listed in Table 1.…”

Asymmetric acetylenic thioethers in ruthenium cluster chemistry

“…Table 1 Selected distances ( A) and angles (°) of [Ru 3 (CO) 9 (l,g 2 -SCBCSi i Pr 3 )(l 3 ,g 2 -CBCSiMe 3 )] alcohol as matrix. i Pr 3 SiCBCSCBCSiMe 3 and i Pr 3 SiCBCSCBCH were prepared as previously reported [8].…”

Molecular structures and electronic properties of helical thiophene carbon–sulfur oligomers, H2(C2S) n C2H2 (n = 1–20)

“…Helical carbon-sulfur (C 2 S) n oligoacetylenic sulfides and polymers of carbon disulfide prepared from the thiophenebased annulations of linear b-oligothiophenes were reported [5][6][7][8]. Annulated and functionalized b-trithiophenes (dithieno[2,3-b:3 0 ,2 0 -d]thiophenes), building blocks for the helically annulated, cross-conjugated b-oligothiophenes, were synthesized and their UV-Vis spectra were observed [9].…”

“…The asymmetric synthesis and characterization of helical (C 2 S) n b-undecathiophene and helical b-heptathiophene were studied and optical band gaps for the (C 2 S) n helix polymers were estimated [11]. Oligothiophene-based [7]helicenes were synthesized, characterized, and functionalized for design of organic chiral glasses with strong chirooptical properties [12][13][14]. Thiophene-based annulations of linear b-oligothiophenes giving helical carbon-sulfur (C 2 S) n oligomers for large n and possessing moderate curvature characteristic of helicenes were noted [6].…”

“…Chiral properties of [n]helicenes with n ortho-fused aromatic rings [22] were studied. Chirooptical properties and the degree of electron delocalization of functionalized thiophene-based [7]helicenes were determined and compared to those of analogous carbon-sulfur [7]helicene [23]. The spectroscopic Raman spectra of helically annulated b-oligothiophenes with 3, 7, and 11 thiophene rings analyzed with the B3LYP/6-31G** vibrational computations were reported [24].…”