Synthesis and structure of 4,6-disubstituted dibenzothiophenes and their use in the preparation of binuclear platinum(ii) complexes

Bidentate Chelate Complexes of Palladium(II) with the Carbanion 2-C6F4PPh2and Their Transformation into Complexes Containing Bridging 2-C6F4PPh2

“…We have shown previously that 2-Me 3 SnC 6 F 4 PPh 2 is also a convenient alternative to 2-LiC 6 F 4 PPh 2 in the preparation of the digold(I) complex [Au 2 (μ-2-C 6 F 4 PPh 2 ) 2 ] . Following the pioneering work of Eaborn, Pidcock, et al, − (aryl)trimethyltin reagents have been used extensively for the selective transfer, under mild conditions, of one or two aryl groups to platinum(II), − but in the case of palladium(II) the reaction is usually successful only when, as in our case, the aryl groups bear a donor center. − …”

Diversity-oriented synthesis of tetrathia[8]circulenes by sequential C–H borylation and annulation

“…The C-S bonds in 1b (1.724(3), 1.727(3), 1.722(3) and 1.719(3) Å) and 1d (1.716(7), 1.722(8), 1.719(7) and 1.712(7) Å) are slightly shorter than those in dibenzothiophenes (1.753-1.758 Å), and the average inner angles of the central eight-membered rings (1b: 134.81 and 1d: 135.01) are larger than the corresponding angles in dibenzothiophenes (1281-1301). 19 Interestingly, the packing structure of 1d (Fig. 1b) is quite different from that of 1b.…”

“…135.0°) are larger than the corresponding angles in dibenzothiophenes (128°-130°). 19 Interestingly, the packing structure of 1d (Figure 1b) is quite different from that of 1b. In the packing structure of 1d, the molecules are arranged in a face-to-face stacking manner and the distance between the π-planes is 3.47 Å.…”

3,5-Bis(trimethylsilyl)triphenyleno[1,12-bcd]thiophene

“…A pattern of bond alternation of C-C bonds in (1) is similar to that found in (4), although the lengths of the C-C bonds around the central and thiophene rings of (1) are slightly different from those of the corresponding bonds of (4). The C5-C6 and C11-C12 distances (1.467 (2) and 1.465 (2) Å) are slightly longer than those of (4) (ca 1.44 Å), while the C17-C18 distance (1.412 (2) Å) is slightly shorter than the corresponding bonds of (4) (ca 1.44 Å) and 4,6-bis(trimethyl-silyl)dibenzothiophene (1.448 (2) Å) (Chantson et al, 2003). The angles of C4-C5-C6 and C11-C12-C13 are 127.45 (15) and 127.38 (15) °, respectively, larger than the corresponding angles of triphenylene (4) (Ahmed & Trotter, 1963) (ca 120 °), reflecting a formation of the thiophene ring in (1).…”