Reaction of the sulfur-coordinated thiophene in Cp*(CO)2Re(SC4H4) to give the thiophene-bridged Cp*(CO)2Re(.mu.-SC4H4)Fe(CO)3

Choi, Moon Gun; Angelici, Robert J.

doi:10.1021/ja00205a046

Cited by 48 publications

(21 citation statements)

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“…Conventionally, thiophene is considered to coordinate poorly to transition metals although there are several recent examples in which M-S(thiophene) distances have been found that are roughly equal to the sum of the covalent radii of divalent sulfur and the metal involved (7)(8)(9)(10)(11)(12)(13)(14)(15). In addition, there are compounds in which weaker interactions occur that can be detected spectroscopically and for which the M-S distance is much longer (16).…”

Section: %mentioning

confidence: 99%

X-ray structural and nuclear magnetic resonance study of open chain and macrocyclic thioether complexes

Lucas¹,

Liu²,

Newlands³

et al. 1990

Can. J. Chem.

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. Can. J. Chem. 68, 1357 (1990). Preparations of the thiophenophane and open chain thioether complexes MX2.BBTE (M = Pd; X = C1, I) (M = Pt; X = C1) (BBTE = 1,2-bis(benzy1thio)ethane) and MX2.L (M = Pd; X = C1, Br, I, SCN) (M = Pt; X = C1) (L = 2,5,8-trithia[9](2,5)thiophenophane) are described. The molecular structure of PdBr2.L which contains a weak thiophene-sulfur-topalladium interaction has been determined: space group P2]/n, a = 8.3569(3), b = 16.3254(15), c = 11.1462(3) A, P = 92.833(4)", Z = 4, Rf = 0.060, R, = 0.058. The electronic, low frequency ir, and I3C nrnr spectra are described. Variable temperature 'H nmr spectra are discussed and it is concluded that the open chain complexes undergo rapid conformational exchange at room temperature but are configurationally rigid unless the temperature is increased. In contrast, the macrocyclic complexes undergo very limited conformational and no configurational exchange up to theu decomposition temperatures. They are also nonfluxional in the same temperature range. Chemical exchange of acidic ligand hydrogens and a metal-ligand dissociative equilibrium were also detected when X = SCN.Key words: thiophene, thioether, macrocyclic metal complexes. On discute des spectres rmn du 'H a tempkrature variable et on en conclut que, a la temptrature ambiante, les complexes avec des chaines ouvertes subissent des tchanges conformationnels rapides; toutefois, ils sont rigides d'un point de vue configurationnel, i moins que l'on augmente la temptrature. Par ailleurs, lorsqu'on soumet les complexes avec des macrocycles B des temptratures allant jusqu'i leurs temptratures de dtcomposition, ils ne subissent que des tchanges conformationnels et configurationnels trts limitts. Dans le cas oil X = SCN, on a aussi dttectt un tchange chimique impliquant les hydrogtnes acides agissant comme ligands ainsi qu'un tquilibre mttal ligand impliquant une dissociation.

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Section: %mentioning

confidence: 99%

X-ray structural and nuclear magnetic resonance study of open chain and macrocyclic thioether complexes

Lucas¹,

Liu²,

Newlands³

et al. 1990

Can. J. Chem.

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“…[Re(η-C 5 Me 5 )(CO) 2 -(thf )] (thf = tetrahydrofuran) will react with simple thiophenes to give [Re(η-C 5 Me 5 )(CO) 2 {η 1 (S)-C 4 H 4Ϫx Me x S}] as air-stable solids. 6 The η 5 co-ordination mode of thiophene in which the ligand acts as a six-electron donor analogous to C 5 H 5 Ϫ is commonly encountered, indeed the first example was reported as long ago as 1958. 7 A recent review 8 suggests that electron density on the sulfur heteroatom increases in the following order: dibenzothiophene (dbt) > benzothiophene (bt) > thiophene.…”

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“…When the reaction of compound 4 with [Co(cp) 2 ] was carried out in the presence of triiron dodecacarbonyl a complex sequence of reactions was observed. The products isolated and characterised are given in Scheme 2 (5)(6)(7)(8); in addition some free dbt was recovered. Compounds 6 and 8 are known; 6 is the dibenzoferrole recently reported 1 and [{Fe(η-C 5 Me 5 )(CO) 2 } 2 ], where the C 5 Me 5 groups must have originated from rhodium, was first reported by Teller and Williams.…”

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confidence: 99%

Heterocyclic organotellurium compounds as precursors for new organometallic derivatives of rhodium

Badyal¹,

McWhinnie²,

Chen³

et al. 1997

J. Chem. Soc., Dalton Trans.

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“…However, all model adducts of this type [Eqs. (1 2) and (13)] have the adducted metal group on the opposite side of the thiophene ring from theq4-coordinating metal; thisarrangement seems unlikely to occur on a surface.…”

Section: Q4-thiophene Bindingmentioning

confidence: 99%

Organometallic Complexes as Models for the Adsorption of Thiophenes on Hydrodesulfurization (HDS) Catalysts

Angelici

1995

Bulletin des Soc Chimique

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Reaction of the sulfur-coordinated thiophene in Cp(CO)2Re(SC4H4) to give the thiophene-bridged Cp(CO)2Re(.mu.-SC4H4)Fe(CO)3

Cited by 48 publications

References 1 publication

X-ray structural and nuclear magnetic resonance study of open chain and macrocyclic thioether complexes

X-ray structural and nuclear magnetic resonance study of open chain and macrocyclic thioether complexes

Heterocyclic organotellurium compounds as precursors for new organometallic derivatives of rhodium

Organometallic Complexes as Models for the Adsorption of Thiophenes on Hydrodesulfurization (HDS) Catalysts

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