%0 Journal Article %A Tan, Gengwen %A Zhu, Hongping %D 2011 %T Probing Stepwise Reaction of NNP–Ligand Copper(I) Complex with Elemental Sulfur by Using N-Heterocyclic Carbene as a Trapper %U https://acs.figshare.com/articles/journal_contribution/Probing_Stepwise_Reaction_of_NNP_Ligand_Copper_I_Complex_with_Elemental_Sulfur_by_Using_i_N_i_Heterocyclic_Carbene_as_a_Trapper/2627486 %R 10.1021/ic200008z.s002 %2 https://acs.figshare.com/ndownloader/files/4278236 %K 3C %K S 8 %K CuS %K NNP %X The dinuclear NNP–ligand copper(I) complex [o-NCH(C4H3N)–PPh2C6H4]2Cu2 (1) has been synthesized by the reaction of (CuMes)4 (Mes = 2,4,6-Me3C6H2) with N-((1H-pyrrol-2-yl)-methylene)-2-(diphenylphosphino)benzenamine under an elimination of MesH. Further reaction of 1 with an excess of S8 produced a mononuclear Cu(II) complex [o-NCH(C4H3N)–P(S)Ph2C6H4]2Cu (5) and CuS. CuS was identified by Raman spectroscopy and 1 and 5 were clearly confirmed by X-ray crystallography. The N-heterocyclic carbene was employed to react with 1 to give a mononuclear [o-NCH(C4H3N)–PPh2C6H4]Cu{C[N(iPr)CMe]2} (2). The reactions of 2 were carried out with 1/8, 2/8, and 5/8 equiv of S8, leading to compounds [o-NCH(C4H3N)–P(S)Ph2C6H4]Cu{C[N(iPr)CMe]2} (3), [o-NCH(C4H3N)–P(S)Ph2C6H4]Cu (4), and 5 respectively, in which CuS was generated in the third reaction and SC[N(iPr)CMe]2 in the latter two reactions. The clean confirmation of 24 demonstrates a stepwise reaction process of 1 with S8 to 5 and CuS and the N-heterocyclic carbene acts well as a trapping agent. %I ACS Publications