Article (Scientific journals)
Gold(I) complexes bearing mixed-donor ligands derived from N-heterocyclic carbenes
Chia, Eugene Y; Naeem, Saira; Delaude, Lionel et al.
2011In Dalton Transactions, 40 (25), p. 6645-6658
Peer reviewed
 

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Abstract :
[en] The new 2-phenylthiocarbamoyl-1,3-dimesitylimidazolium inner salt (IMes•CSNPh) reacts with [AuCl(L)] in the presence of NH4PF6 to yield [(L)Au(SCNPh•IMes)]+ (L = PMe3, PPh3, PCy3, CNBut). The carbene-containing precursor [(IDip)AuCl] reacts with IMes•CSNPh under the same conditions to afford the complex [(IDip)Au(SCNPh•IMes)] + (IDip = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene). Treatment of the diphosphine complex [(dppm)(AuCl)2] with one equivalent of IMes•CSNPh yields the digold metallacycle, [(dppm)Au 2(SCNPh•IMes)]2+, while reaction of [L 2(AuCl)2] with two equivalents of IMes•CSNPh results in [(L2){Au(SCNPh•IMes)}2]2+ (L2 = dppb, dppf, or dppa; dppb = 1,4-bis(diphenylphosphino)butane, dppf = 1,1'-bis(diphenylphosphino)ferrocene, dppa = 1,4- bis(diphenylphosphino)acetylene). The homoleptic complex [Au(SCNPh•IMes) 2]+ is formed on reaction of [AuCl(tht)] (tht = tetrahydrothiophene) with two equivalents of the imidazolium-2- phenylthiocarbamoyl ligand. This product reacts with AgOTf to yield the mixed metal compound [AuAg(SCNPh•IMes)2]2+. Over time, the unusual trimetallic complex [Au(AgOTf)2(SCNPh•IMes) 2]+ is formed. The sulfur-oxygen mixed-donor ligands IMes•COS and SIMes•COS (SIMes = 1,3-bis(2,4,6-trimethylphenyl) imidazolin-2-ylidene) were used to prepare [(L)Au(SOC•IMes)]+ and [(L)Au(SOC•SIMes)]+ from [(L)AuCl] (L = PPh3, CNtBu). The bimetallic examples [(dppf){Au(SOC•IMes)} 2]2+ and [(dppf){Au(SOC•SIMes)}2] 2+ were synthesized from the reaction of [(dppf)(AuCl)2] with the appropriate ligand. Reaction of [(tht)AuCl] with one equivalent of IMes•COS or SIMes•COS yields [Au(SOC•IMes) 2]+ and [Au(SOC•SIMes)2]+, respectively. The compounds [(Ph3P)Au(SCNPh•IMes)]PF 6, [(Cy3P)Au(SCNPh•IMes)]PF6 and [Au(AgOTf)2(SCNPh•IMes)2]OTf were characterized crystallographically.
Disciplines :
Chemistry
Author, co-author :
Chia, Eugene Y
Naeem, Saira
Delaude, Lionel  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie organométallique et catalyse homogène
White, Andrew J P
Wilton-Ely, James D E T
Language :
English
Title :
Gold(I) complexes bearing mixed-donor ligands derived from N-heterocyclic carbenes
Publication date :
2011
Journal title :
Dalton Transactions
ISSN :
1477-9226
eISSN :
1477-9234
Publisher :
Royal Society of Chemistry, Cambridge, United Kingdom
Volume :
40
Issue :
25
Pages :
6645-6658
Peer reviewed :
Peer reviewed
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