25749-32-0Relevant articles and documents
Hypercoordinated compounds of gold(I) 1. Synthesis and properties of mon- and binuclear organogold(I) derivatives of diphenyl ether
Baukova, T. V.,Oleinikova, N. A.,Lemenovskii, D. A.,Kuz'mina, L. G.
, p. 681 - 688 (1994)
Mono- and binuclear gold(I) derivatives of ortho-substituted diphenyl ether, C6H5OC6H4AuPPh3 and O(C6H4)2(AuPPh3)2, were prepared by the reaction of the 2,2'-dilithium derivative of diphenyl ether with ClAuPPh3.X-Ray structural study has shown that these compounds contain secondary intramolecular bonds between the gold and oxygen atoms.The interaction of C6H5OC6H4AuPPh3 with (AuPPh3)BF4 affords the BF4 cationic complex.The latter react with PPh3 to give the starting C6H5OC6H4AuPPh3 complex. - Key words: synthesis. diphenyl ether, hypercoordinated organogold(I) compounds, secondary bonds, X-ray diffractional analysis.
Ligand exchange at a gold(I) carbene complex
Jahnke, Mareike C.,Pape, Tania,Hahn, F. Ekkehardt
, p. 467 - 473 (2013)
Gold complex [AuCl(NHC)] (NHC=N,N′-dipropylbenzimidazolin-2-ylidene) 1 undergoes facile substitution reactions at the gold(I) center. Treatment of 1 with anionic phenylacetylide or thiophenolate led to the neutral gold complexes 2 and 3, respectively. The cationic gold complexes [Au(NHC)(pyridine)](BF 4) [4]BF4 and [Au2(NHC)2(4,4′- bipyridine)](BF4)2 [5](BF4)2 were obtained via abstraction of the chloro ligand from 1 and reaction with the appropriate amine. Reaction of 1 with AgBF4 in the presence of PPh3 instead of an amine led to an inseparable product mixture of the mixed NHC=PPh3 complex [6]BF4, the dicarbene complex [Au(NHC)2]BF4, [7]BF4, and [Au(PPh 3)2]BF4, [8]BF4. Crystals of 2 and [6]BF4 were obtained, and X-ray diffraction structure analyses revealed that the gold(I) atoms are coordinated in a linear fashion by the NHC and the co-ligand.
Transition metal coordination and reactivity of 2-(azidomethyl)-, 2-(chloromethyl)- and 2-(iodomethyl)phenyl isocyanides
Basato, Marino,Facchin, Giacomo,Michelin, Rino A.,Mozzon, Mirto,Pugliese, Sandra,Sgarbossa, Paolo,Tassan, Augusto
, p. 349 - 356 (2008/10/09)
2-(Azidomethyl)phenyl isocyanide, 2-(CH2N3)C 6H4N≡C (AziNC), coordinates to {M(CO)5} (M=W, Cr) fragments to afford the corresponding isocyanide complexes [M(CO) 5(AziNC)] (M=W (1), Cr (2)). AziNC coordinates also to some Au(I) species such as [AuCl(AziNC)] (3), derived from the reaction of [AuCl(Me 2S)] with AziNC, and [Au(AziNC)2][BF4] (4), obtained from the reaction of 3 with AgBF4, followed by treatment with AziNC. Complexes 1 and 2 undergo the Staudinger reaction with PPh 3 affording the phosphinimine-isocyanide derivatives [M(CO) 5{C≡NC6H4-2-(CH2N=PPh 3)}] (M=W (5), Cr (6)). Complex 6 reacts with H2O affording a mixture of the amino-isocyanide [Cr(CO)5{C≡NC 6H4-2-(CH2NH2)}] (7) and the carbene [Cr(CO)5{CN(H)C6H4-2-CH 2N(H)}] (8) species. Complexes 3 and 4 react with 1 or 2 equiv. of PPh3 displacing the isocyanide with the formation of the complexes [AuCl(PPh3)] (9) and [Au(PPh3)2][BF 4] (10), respectively. The halogeno-isocyanide complexes [W(CO) 5(CNC6H4-2-CH2Cl)] (11) and [W(CO)5(CNC6H4-2-CH2I)] (12) show different reactivity towards amines so that only 12 reacts with MeNH 2 to afford in low yield the N-heterocyclic carbene species [W(CO)5{CN(H)C6H4-2-CH2N(Me)}] (13).
Heteronuclear complexes containing {Au2Rh}, {Au2Ir} and {AuIr} cores with a dithiolate ligand bridging the metal centres - X-ray structures of [Au2Ir(μ-S2C6H4)(cod) (PPh3)2]BF4 and [AuIr(μ-S2C6H3CH3)(cod) (PPh3)]
Rio, Inmaculada del,Terroba, Raquel,Cerrada, Elena,Hursthouse, Michael B.,Laguna, Mariano,et al.
, (2008/10/08)
The use of dinuclear gold derivatives [Au2(μ-S-S)(PR3)2] (S-S = benzenedithiolate, toluenedithiolate; PR3 = PPh3, PPh2Me) as S-donor ligands, with rhodium and iridium complexes [M(cod)2]BF4 (M = Rh, Ir; cod = cyclooctadiene) affords new heteronuclear compounds containing the {Au2M} core, with the general formulation [Au2M(μ-S-S)-(cod)(PR3)2]BF4. One of these decomposes upon heating to give [AuIr(μ-S2C6H4CH3)(cod) (PPh3)]. The crystal structure of the former and [Au2Ir(μ-S2C6H4)(cod) (PPh3)2]BF4 have been established by X-ray diffraction, The sulfur atoms from the dithiolene ligands bridge two different metal centres.
