Synthesis and catalytic application of palladium imidazol(in)ium-2-dithiocarboxylate complexes
作者:Martin J. D. Champion、Riten Solanki、Lionel Delaude、Andrew J. P. White、James D. E. T. Wilton-Ely
DOI:10.1039/c2dt31413d
日期:——
amounts of 2,10-dimethoxybenzo[h]quinoline were also isolated from these reactions. Using [Pd(C,N-bzq)(S2C·IDip)]+ and N-chlorosuccinimide as the oxidant led to the formation of 10-chlorobenzo[h]quinoline in moderate yield from benzo[h]quinoline. The molecularstructures of [Pd(S2C·IMes)(PPh3)2](PF6)2 and [Pd(S2C·IMes)(dppf)](PF6)2 were determined crystallographically.
The Use of Imidazolium-2-dithiocarboxylates in the Formation of Gold(I) Complexes and Gold Nanoparticles†Dedicated to Prof. Dr. Hubert Schmidbaur on the occasion of his 75th birthday.
作者:Saira Naeem、Lionel Delaude、Andrew J. P. White、James D. E. T. Wilton-Ely
DOI:10.1021/ic9021504
日期:2010.2.15
The imidazolium-2-dithiocarboxylate ligands IPr center dot CS2, Mes center dot CS2, and IDip center dot CS2 react with [AuCl(PPh3)] to yield [(Ph3P)Au(S2C center dot IPr))(+), [(Ph3P)Au(S2C center dot IMes)](+), and [(Ph3P)Au(S2C-IDip)](+), respectively. The compounds [(L)Au(S2C-IMes)](+) are prepared from the reaction of IMes center dot CS2 with [AuCl(L) (L = PMe3, PCy3, (CNBu)-Bu-t). The carbene-containing precursor [(IDip)AuCl] reacts with IPr center dot CS2 and IMes center dot CS2 to afford the complexes [(IDip)Au(S2C center dot IPr)](+) and [(IDip)Au(S2C center dot IMes)](+) with two carbene units, one bound to the metal center and the other to the dithiocarboxylate unit. Treatment of the diphosphine-gold complex [(dppm)(AuCl)(2)] with 1 equiv of IMes center dot CS2 yields [(dppm)Au-2(S2C center dot IMeS)](2+), while the reaction of [L-2(AuCl)(2)] (L-2 = dppb, dppf) with 2 equiv of IMes center dot CS2 results in [(L-2)Au (S2C center dot IMes)}(2)](2+). The homoleptic complexes [Au(S2C center dot IPr)(2)](2+), [Au(S2C center dot IMes)(2)](2+), and [Au(S2C center dot IDiP)(2)](2+) are obtained from the reaction of [AuCl(tht)] with 2 equiv of the appropriate imidazolium-2-dithiocarboxylate ligand. The compounds [(Ph3P)Au(S2C center dot NHC)](+) (NHC = IMes, IDip) and [(IDip)Au(S2C center dot NHC)](+) (NHC = IPr, IMes) are characterized crystallographically. The IMes center dot CS2 ligand is also used to prepare functionalized gold nanoparticles with diameters of 11.5 (+/-1.2) and 2.6 (+/-0.3) nm.
Zwitterionic dithiocarboxylates derived from N-heterocyclic carbenes: coordination to gold surfaces
作者:Ulrich Siemeling、Henry Memczak、Clemens Bruhn、Florian Vogel、Frank Träger、Joe E. Baio、Tobias Weidner
DOI:10.1039/c2dt11976e
日期:——
2+–CS2−–4+–CS2− were structurally characterised by single-crystal X-ray diffraction studies. The chemisorption of these zwitterionic dithiocarboxylates on solid gold substrates was investigated in situ and in real time by optical second harmonic generation (SHG). The resulting thin films were exemplarily characterised by near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and X-ray photoelectron
Dithiocarboxylate complexes of ruthenium(ii) and osmium(ii)
作者:Saira Naeem、Amber L. Thompson、Andrew J. P. White、Lionel Delaude、James D. E. T. Wilton-Ely
DOI:10.1039/c1dt10048c
日期:——
The ruthenium(II) complexes [Ru(R)(κ2-S2C·IPr)(CO)(PPh3)2]+ (R = CHCHBut, CHCHC6H4Me-4, C(CCPh)CHPh) are formed on reaction of IPr·CS2 with [Ru(R)Cl(CO)(BTD)(PPh3)2] (BTD = 2,1,3-benzothiadiazole) or [Ru(C(CCPh)CHPh)Cl(CO)(PPh3)2] in the presence of ammonium hexafluorophosphate. Similarly, the complexes [Ru(CHCHC6H4Me-4)(κ2-S2C·ICy)(CO)(PPh3)2]+ and [Ru(C(CCPh)CHPh)(κ2-S2C·ICy)(CO)(PPh3)2]+ are formed