Hydrodesulfurization of thiophene to butadiene and butane by a homogeneous iridium complex

C–S Bond Activation and Partial Hydrogenation of Thiophene by a Dinuclear Trihydride Platinum Complex

“…Consistent with literature data, [35,36,45] high temperature, significant excess of thiophene with respect to the platinum complex, and sev-eral hours are required for optimum rate and yield. While under these experimental conditions we always observed the concomitant formation of two platinum complexes, their relative amounts were dependent on the presence or absence of benzene or toluene solvent.…”

“…[42][43][44] In terms of mono-and dinuclear transition-metal complexes, the only example of a complete desulfurization of thiophene to butadiene was achieved by means of a dinuclear polyhydride iridium complex in the presence of a hydrogen acceptor compound. [45] Several intermediate species identified by NMR showed how the activation of the second C-S bond is subsequent to the hydrogenation of the thiophenic chain. Within this context, it is worth noting that in the examples where the first C-S bond activation is accompanied by hydrogenation (Scheme 1, lefthand side), [32,46,47] the complete desulfurization has usually required further treatment with H 2 .…”

Binuclear cyclopentadienyliridium hydride chemistry: Terminal versus bridging hydride and cyclopentadienyl ligands

“…In addition to Cp* 2 Ir 2 (µ-H) 2 , the hydrogenricher species Cp* 2 Ir 2 H 6 has been synthesized but not characterized structurally. 6,13 Re H This paper reports a systematic density functional theory study of the cyclopentadienyliridium hydrides CpIrH n (n = 4, 2) and Cp 2 Ir 2 H n (n = 6, 4, 2) as well as the hydride-free Cp 2 Ir 2 . The mononuclear CpIrH 4 , but not the other species, was studied theoretically some time ago by Lin and Hall.…”

“…16 The hexahydride Cp* 2 Ir 2 H 6 has been shown to hydrodesulfurize thiophene to give butadiene and butane. 13 …”

Allylpalladium (II) complexes with dichalcogenoimidodiphosphinate ligands: Synthesis, structure, spectroscopy and their transformation into palladium chalcogenides

“…Platinum group metal chalcogenolates have been important in view of their rich reaction chemistry [1][2][3][4], structural diversity and relevance in catalysis [5][6][7][8]. Of late, they have also gained much attention due to their possible role as single source molecular precursors for metal chalcogenides [9][10][11][12], which find extensive applications in catalysis [13][14][15][16][17] and material science [18][19][20].…”