103887-87-2Relevant academic research and scientific papers
Synthesis and Spectroscopic Characterisation of New Bis(thiolato)- and Endithiolato-bis(η5-cyclopentadienyl)hafnium(IV) Complexes
Koepf, Hartmut,Klapoetke, Thomas
, p. 1338 - 1343 (2007/10/02)
The hafnocene thiophenolates Cp2Hf(SC6H4R)2 (Cp = η5-C5H5; R = H, o-Me, p-Me, p-NH2) and cis-1,2-endithiolates Cp2Hf(S2C6H4), Cp2Hf(S2C6H3Me-4), and Cp2Hf were prepared by reaction of Cp2HfCl2 with equivalent amounts of the appropriate lithium thiolates or endithiolates, or with Na2S2C2(CN)2, respectively.From variable temperature 1H NMR studies of the endithiolate complexes with aromatic ligands a folded ( envelope ) conformation of the five-membered chelate rings, undergoing rapid inversion at room temperature, can be derived. - Key words: Hafnocene Derivatives, Bis(thiolato)bis(η5-cyclopentadienyl)hafnium(IV) Complexes, Endithiolato-bis(η5-cyclopentadienyl)hafnium(IV) Complexes, Dithiolene Chelate Ring Conformation
