Metal Carbene Complexes from Alkynes

摘要: Electron-rich metal carbene complexes, the 1,3-dithiol-2-ylidene iron(0) derivatives obtained in one step from Fe(CS2)(CO)2(PR3)2 and alkynes, can be stabilized by donor-acceptor Hg(II)→Fe(0) bond formation. Their protonation mechanism involves formation of trans hydrido iron intermediate, isomerisation into cis species, 1,2-hydrogen shift to carbon coordination sulphur atom. The dimerisation ligand tetrathiafulvalene derivative is achieved either thermolysis, oxidation with iodine or electrocatalysis. interaction RuCl2(PR3)(arene) complexes terminal alkynes presence alcohol provides a general route arene-ruthenium-carbene via arene-ruthenium-vinylidene intermediates. react vinylacetylene produce allylcarbene ruthenium disubstituted propargyl alcohols give, an allenylidene vinylcarbene-ruthenium complexes. electronic RuCl(PR3)2(C5H5) have different potential behave quite differently toward alkynes.