Gold-halogen stretching frequencies

Williamson, Darcy; Baird, Michael C.

doi:10.1016/0022-1902(72)80233-1

Cited by 46 publications

(10 citation statements)

References 17 publications

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“…Compound 1 exhibits a sharp m(Au 35 Cl) band at 315 cm À1 with a m(Au 37 Cl) satellite at 308 cm À1 consistent with theory; m(AuCl) for the phosphite complex 8 has been reported at 326 cm À1 [20]. Combined with the crystallographic findings (see below) this suggests that the AuÁ Á ÁS contacts in 1 could weaken both Au-P and AuCl bonds compared to 8.…”

Section: Infrared Spectroscopysupporting

confidence: 62%

See 1 more Smart Citation

The preparation, properties and X-ray structures of gold(I) trithiophosphite complexes

Strasser

Cronje

Schmidbaur

et al. 2006

Journal of Organometallic Chemistry

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Section: Infrared Spectroscopysupporting

confidence: 62%

“…The Au-Cl stretching band for (PhO) 3 PAuCl was reported at 340 cm À1 [20], suggesting that both ligands induce a similar electronic effect since no close intermolecular contacts are observed in the molecular structures of these compounds (see below).…”

Section: Infrared Spectroscopymentioning

confidence: 94%

The preparation, properties and X-ray structures of gold(I) trithiophosphite complexes

Strasser

Cronje

Schmidbaur

et al. 2006

Journal of Organometallic Chemistry

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“…The observed IR bands are characteristic of tertiary phosphine-gold halide complexes. 28, 29 The bis(pentafluorophenyl) complex 18 also isomerises on heating in toluene or in CH 2 Cl 2 -C 6 D 6 to the corresponding gold(I)-gold(III) complex 31, which was isolated as a pale yellow solid that showed a pair of multiplets at d 50 and -62.5 in its 31 P NMR spectrum. This behaviour differs from that of the corresponding 2-C 6 H 4 PPh 2 complex, which rearranges predominantly by C-C coupling to the biphenyldiyl product, [Au 2 (C 6 F 5 ) 2 (m-2,2¢-Ph 2 PC 6 H 4 C 6 H 4 PPh 2 )], together with a small amount of the zwitterionic complex [(C 6 F 5 ) 2 Au III (m-2-C 6 H 4 PPh 2 ) 2 Au I ].…”

Section: Isomerisation Of the Digold(ii) Complexesmentioning

confidence: 99%

Synthesis and interconversions of digold(i), tetragold(i), digold(ii), gold(i)–gold(iii) and digold(iii) complexes of fluorine-substituted aryl carbanions

et al. 2009

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Treatment of [AuXL] (X = Br, L = AsPh(3); X = Cl, L = tht) with the lithium or trimethyltin derivatives of the carbanions [2-C6F4PPh2]- and [C6H3-n-F-2-PPh2]- (n = 5, 6) gives digold(I) complexes [Au2(mu-carbanion)2] (carbanion = 2-C6F4PPh2 2, C6H3-5-F-2-PPh2 3, C6H3-6-F-2-PPh2 4) which, like their 2-C6H4PPh2 counterpart, undergo oxidative addition with halogens X2 (X = Cl, Br, I) to give the corresponding, metal-metal bonded digold(II) complexes [Au2X2(mu-carbanion)2] (carbanion = 2-C6F4PPh2, X = Cl 5, Br 8, I 11; carbanion = C6H3-5-F-2-PPh2, X = Cl 6, Br 9, I 12; carbanion = C6H3-6-F-2-PPh2, X = Cl 7, Br 10, I 13). In the case of 2-C6F4PPh2 and C6H3-6-F-2-PPh2, the dihalodigold(II) complexes rearrange on heating to isomeric gold(I)-gold(III) complexes [XAu(I)(mu-P,C-carbanion)(kappa2-P,C-carbanion)Au(III)X] (carbanion = 2-C6F4PPh2, X = Cl 25, Br 26, I 27; carbanion = C6H3-6-F-2-PPh2, X = Cl 28, Br 29, I 30), in which one of the carbanions chelates to the gold(III) atom. This isomerisation is similar to, but occurs more slowly than, that in the corresponding C6H3-6-Me-2-PPh2 system. The Au2X2 complexes 6, 9 and 12, on the other hand, rearrange on heating via C-C coupling to give digold(I) complexes of the corresponding 2,2'-biphenyldiylbis(diphenylphosphine), [Au2X2(2,2'-Ph2P-5-F-C6H3C6H3-5-F-PPh2)] (X = Cl 32, Br 33, I 34), this behaviour resembling that of the 2-C6H4PPh2 and C6H3-5-Me-2-PPh2 systems. Since the C-C coupling probably occurs via undetected gold(I)-gold(III) intermediates, the presence of a 6-fluoro substituent is evidently sufficient to suppress the reductive eliminations, possibly because of an electronic effect that strengthens the gold(III)-aryl bond. Anation of 5 or 8 gives the bis(oxyanion)digold(II) complexes [Au2Y2(mu-2-C6F4PPh2)2] (Y = OAc 14, ONO2 15, OBz 16, O2CCF3 17 and OTf 20), which do not isomerise to the corresponding gold(I)-gold(III) complexes [YAu(mu-2-C6F4PPh2)(kappa2-2-C6F4PPh2)AuY] on heating, though the latter [Y = OAc 35, ONO2 36, OBz 37, O2CCF3 38] can be made by anation of 25-27. Reaction of the bis(benzoato)digold(II) complex 16 with dimethylzinc gives a dimethyl gold(I)-gold(III) complex, [Au(I)(mu-2-C6F4PPh2)2Au(III)(CH3)2] 19, in which both 2-C6F4PPh2 groups are bridging. In contrast, the corresponding reaction of 16 with C6F5Li gives a digold(II) complex [Au(II)2(C6F5)2(mu-2-C6F4PPh2)2] 18, which on heating isomerises to a gold(I)-gold(III) complex, [(C6F5)Au(I)(mu-2-C6F4PPh2)(kappa2-2-C6F4PPh2)Au(III)(C6F5)] 31, analogous to 25-27. The bis(triflato)digold(II) complex 20 is reduced by methanol or cyclohexanol in CH2Cl2 to a tetranuclear gold(I) complex [Au4(mu-2-C6F4PPh2)4] 21 in which the four carbanions bridge a square array of metal atoms, as shown by a single-crystal X-ray diffraction study. The corresponding tetramers [Au4(mu-C6H3-n-F-2-PPh2)4] (n = 5 22, 6 23) are formed as minor by-products in the preparation of dimers 3 and 4; the tetramers do not interconvert readily with, and are not in equilibrium with, the corresponding dimers 2-4. Addition of an excess ...

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“…O espectro de (HL)AuBr 3 .2CH 2 Cl 2 apresenta três estiramentos ν Au-Br a 315, 295 e 275 cm -1 que são semelhantes àqueles do AuBr 3 (PPh 3 ), que possui ν Au-Br a 254 e 222 cm -1 . Sendo assim, os estiramentos de Au-Br do novo complexo aparecem a uma energia mais alta do que no derivado-trifenilfosfina 11 . A condutividade singular de valor Λ o m = 76,6 Ω -1 cm 2 mol -1 pode ser resultado de hidrólise ou solvólise, embora um pouco abaixo dos limites estabelecidos para eletrólitos 1:1 definidos por Geary.…”

Section: Derivados De Ouro(iii)unclassified

Síntese e caracterização de cloro[ácido 2-(difenilfosfino)benzóico]-ouro(I) e alguns de seus derivados

Howe¹,

Parish²,

Pritchard³

1998

Quím. Nova

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Recebido em 23/4/97; aceito em 17/12/97 SYNTHESIS AND CHARACTERIZATION OF NEW GOLD (I) PHOSPHINE COMPLEXES. In this contribution a few new gold(I)phosphine complexes, [2-(PPh 2)C 6 H 4 CO 2 H]AuX (where X = Cl, SCN, Br 3) and a similar gold(III) derivative [{2-(PPh 2)C 6 H 4 CO 2 H}Au III Cl (C 6 H 4 CH 2 NMe 2)]Cl have been synthesised and characterised. The phosphine, 2-(diphenylphosphino)benzoic acid, has been employed for the first time in gold chemistry. This ligand is potentially bidentate through bonding of the phosphine and carboxylate groups. The X-ray structure of the complex chloro[2-(diphenylphosphino) benzoic acid]gold(I) has been elucidated and the bond lengths encountered show great similarity to those of chloro(triphenylphosphine)gold(I). [2-(PPh 2)C 6 H 4 CO 2 H]AuCl crystallises in the space group P2 1 /c with a = 9.113(2) Å, b = 10.925(2) Å, c = 23.069(4) Å, β = 99.95 o (3), V = 2299 Å 3 , Z = 4 and R = 0.091. Biological tests for anti-fungal and anti-bacterial activity demostrate that [2-(PPh 2)C 6 H 4 CO 2 H]AuCl exhibits broad spectrum activity against a range of organisms.

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Gold-halogen stretching frequencies

Cited by 46 publications

References 17 publications

The preparation, properties and X-ray structures of gold(I) trithiophosphite complexes

The preparation, properties and X-ray structures of gold(I) trithiophosphite complexes

Synthesis and interconversions of digold(i), tetragold(i), digold(ii), gold(i)–gold(iii) and digold(iii) complexes of fluorine-substituted aryl carbanions

Síntese e caracterização de cloro[ácido 2-(difenilfosfino)benzóico]-ouro(I) e alguns de seus derivados

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