91071-10-2Relevant academic research and scientific papers
New neutral and anionic alkynylgold(I) complexes via new synthetic methods. Crystal and molecular structures of [Au(C≡CSiMe3)(CNtBu)], and [Au(C≡CR)PR′3] (R′ = cyclohexyl, R = CH2Cl, CH2Br; R′ = Ph, R = SiMe3, tBu)
Vicente, José,Chicote, María-Teresa,Abrisqueta, María-Dolores,Jones, Peter G.
, p. 5628 - 5636 (2008/10/08)
[(PPh3)2N][Au(acac)2] (acac = acetylacetonate) reacts with terminal alkynes RC≡CH to give [(PPH3)2N][Au(C≡CR)2] (R = H, tBu, SiMe3, CH2X (X = Cl, Br, OH)) complexes. The reactions between [(PPh3)2N][Au(C≡CH)2] and [(PPh3)2N][AuX2] (X = Cl, Br, I) give [(PPh3)2N][Au(C≡CH)X] complexes. Neutral mononuclear [Au(C≡CR)(NHEt2)] (R = SiMe3, tBu), [Au(C≡CR)(PR′3)] (R = H, R′ = Ph, C6H4OMe-4; R = CH2Cl, CH2Br, CH2OH, R′ = Cy = cyclohexyl; R = SiMe3, R′ = Ph, C6H4OMe-4, Cy; R = tBu, R′ = Ph, Cy, C6H4OMe-4), [Au(C≡CR)(CNtBu)] (R = SiMe3, tBu), and [Au(C≡CR){C(NHtBu)(NEt2)}] (R = H, SiMe3, tBu) or dinuclear [(AuL)2{μ-C≡C(CH2)5C≡C)] (L = PPh3, CNtBu, C(NHtBu)(NEt2)) are obtained via a variety of synthetic methods: (i) reaction between [(PPh3)2N][Au(C≡CH)2] and [Au(PR3)2]ClO4, (ii) reaction of terminal alkynes with [Au(acac)(L)], (iii) reaction of [AuClL] complexes with terminal alkynes in diethylamine, (iv) substitution reactions (e.g., [Au(C≡CR)(NHEt2)] + PR′3), (v) reaction of diethylamine with alkynyl isocyanide derivatives to give alkynylcarbene complexes. The crystal structures of [(PPh3)2N][Au(C≡CCH2OH)2], [Au(C≡CSiMe3)(CNtBu)], and [Au(C≡CR)(PR′3)] (R′ = Cy, R = CH2Cl, CH2Br; R′ = Ph, R = SiMe3, tBu) were determined.
Alkynyl Gold(I) Complexes. The First Family of Ethynyl Gold(I) Complexes
Vicente, Jose,Chicote, Maria-Teresa,Abrisqueta, Maria-Dolores
, p. 497 - 498 (2007/10/02)
Complexes or (R = Ph or C6H4OMe-4) or (X = Cl or Br) have been prepared by reacting or (Hacac = acetylacetone) with acetylene, respectively, or with .
Preparation and Ligand-exchange Reactions of Phosphinegold Ethynyl Complexes
Cross, Ronald J.,Davidson, Michael F.
, p. 411 - 414 (2007/10/02)
Phosphinegold chlorides, , react readily with terminal alkynes RC*CH in ethanolic sodium ethoxide to produce high yields of ethynyl complexes .When R = H a second reaction leads to formation of .In a similar manner, the cyclopentadienyl complex can conveniently be made from , Na(OEt), and C5H6.The phosphine of rapidly exchanges in solutions with free phosphines.The compounds and > readily equilibrate with and >, a reaction which could also involve exchange of phosphines, but the exchange of Cl for C*CPh is another possible pathway.Phenylethynyl groups from exchange with both chlorides of HgCl2, cis-, and cis-.With the latter complex the exchange is non-stereospecific, unlike related reactions with organomercurials.
ETHYNYLGOLD(I) COMPLEXES
Cross, Ronald J.,Davidson, Michael F.,McLennan, Alistair J.
, p. C37 - C39 (2007/10/02)
Reactions between R3PAuCl, NaOEt, and HCCR' under mild conditions produce R3PAuCCR' in excellent yield.When R' = H, a second step leading to the formation of R3PAuCCAuPR3 can take place.Exchange reactions of ethynyl for chloride between the ethynylgold complexes and HgCl2, cis-, cis-, and R 3PAuCl have been monitored, revealing R3PAuCCR' to be useful alkynylating agents.In the reaction with cis-, the first substitution step is non-specific.
