X-Ray structure of a novel product formed from 2,5-dimethylhex-3-yne-2,5-diol by catalytic action of dibromobis(triphenylphosphine)nickel

Furlani, A.; Bicev, P.; FRANZOSO, S.; Villa, A. Chiesi; Manfredotti, A. Gaetani; Guastini, Carlo

doi:10.1039/p29770001011

Cited by 7 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in some instances, partial dehydration occurs on nickel; for example 2,5-dimethylhex-3-yne-2,5-diol undergoes linear/ cyclic oligomerization (5 alkyne molecules) with loss of water and formation of ether linkages. 25 Finally, the (carbonylative) formation of oxygenated metallacycles and of lactones from unsaturated diols in the presence of diiron nonacarbonyl has been reported; in this process loss of hydrogen and/or of water occurs. 26…”

Section: Reaction Pathwaysmentioning

confidence: 99%

Activation of alkynols on transition metal carbonyl clusters. Reactions of 1-ethynylcyclohexanol with Fe3(CO)12 and Co2(CO)8. Crystal structures of Co3(CO)9[μ3-CCH2(C6H10OH)], Fe3(CO)9(μ-CO)[μ3-η2-CC(C6H10)] and Co2Fe(CO)6(μ-CO)[μ3-η7-(C6H9)CC(H)C(H)C(H)(C6H10)]

Gatto

Gervasio

Marabello

et al. 2001

J. Chem. Soc., Dalton Trans.

View full text Add to dashboard Cite

The reactions of Co 2 (CO) 8 with 1-ethynylcyclohexanol (HC᎐ ᎐ ᎐ CC 6 H 10 OH, ECY) in benzene led mainly to Co 2 (CO) 6 (ECY) 1 and to smaller amounts of the methylidyne complex Co 3 (CO) 9 [µ 3-CCH 2 (C 6 H 10 OH)] 2. The reactions of Fe 3 (CO) 12 with ECY in the same solvent led to binuclear metallacyclic derivatives Fe 2 (CO) 6 (ECY) 2 (isomers 3a, 3b) or Fe 2 (CO) 6 [(ECY) 2 Ϫ H 2 O] 3c as the main products; small yields of trinuclear complexes Fe 3 (CO) 9 (µ-CO)[µ 3-η 2-1,2-HC᎐ ᎐ ᎐ C(C 6 H 10 OH)] 4, Fe 3 (CO) 9 (µ-CO)[µ 3-η 2-1,2-C᎐ ᎐ C(C 6 H 10)] 5 and Fe 3 (CO) 7-[µ 3-η 7-(C 6 H 10 OH)CCHCHC(C 6 H 9)] 6 {containing respectively a parallel alkynol, an allenylidene and a dimeric metallacyclic ligand} were also obtained, together with 7, a thermal decomposition product of 6. Finally, when Co 2 (CO) 8 was treated with ECY in benzene, and Fe 3 (CO) 12 was added, the heterometallic complex Co 2 Fe(CO) 6-(µ-CO)[µ 3-η 7-(C 6 H 9)CC(H)C(H)C(H)(C 6 H 10)] 8 was obtained in low yields. The complexes have been characterized by means of IR and 1 H NMR spectroscopies and by mass spectrometry. The structures of 2, 5, 8 have been determined by X-ray diffraction. Complex 2 contains an "hydrogenated" ECY ligand, 5 an allenylidene ligand formed upon dehydration of ECY (loss of the OH and of the terminal hydrogen), whereas 8 contains a ligand formed by tail-to-tail coupling of two ECY molecules, with loss of water and oxygen and shift of hydrogen. The elemental analysis of complex 8 gave a Co : Fe ratio of 2 : 1; on the basis of this analysis, the refinement of the diffraction data allowed a hypothesis on the distribution of the metal atoms in the cluster. Reaction pathways for the formation of these clusters are proposed and dehydration mechanisms for the ligand discussed.

show abstract

Section: Reaction Pathwaysmentioning

confidence: 99%

Activation of alkynols on transition metal carbonyl clusters. Reactions of 1-ethynylcyclohexanol with Fe3(CO)12 and Co2(CO)8. Crystal structures of Co3(CO)9[μ3-CCH2(C6H10OH)], Fe3(CO)9(μ-CO)[μ3-η2-CC(C6H10)] and Co2Fe(CO)6(μ-CO)[μ3-η7-(C6H9)CC(H)C(H)C(H)(C6H10)]

Gatto

Gervasio

Marabello

et al. 2001

J. Chem. Soc., Dalton Trans.

View full text Add to dashboard Cite

show abstract

ChemInform Abstract: X‐RAY STRUCTURE OF A NOVEL PRODUCT FORMED FROM 2,5‐DIMETHYLHEX‐3‐YNE‐2,5‐DIOL BY CATALYTIC ACTION OF DIBROMOBIS(TRIPHENYLPHOSPHINE)NICKEL

Furlani¹,

Bicev²,

FRANZOSO³

et al. 1977

Chemischer Informationsdienst

View full text Add to dashboard Cite

Rhodium and platinum complexes as catalysts for the polymerization of phenylacetylene

Furlani

Licoccia

Russo

et al. 1986

J. Polym. Sci. A Polym. Chem.

108

View full text Add to dashboard Cite

In polymerization reactions of phenylacetylene three different types of polyphenylacetylene (PPA) were prepared by using Rh and Pt complexes as catalysts in different reaction conditions. Type I PPA is obtained with [Rh (COD) Chel] PF6 complexes (COD = cis,cis‐cycloocta 1,5‐diene; chel = 2,2′‐bipyridine, 1,10‐phenanthroline, 2,9‐dimethyl‐1,10‐phenanthroline, 5,6‐dimethyl‐1,10‐phenanthroline, 3,4,7,8‐tetramethyl‐1,10‐phenanthroline) in bulk, benzene methanol, while type II PPA is obtained with the same catalysts in p‐dioxane and type III PPA in the presence of [Pt (CCPh)2(PPh3)2] in bulk. Type I, II, and III PPA exhibit different IR and 1H‐NMR spectra, which have been compared with literature data. Correlations proposed by different Authors between spectral properties of PPA and chain structures are also discussed.

show abstract

X-Ray structure of a novel product formed from 2,5-dimethylhex-3-yne-2,5-diol by catalytic action of dibromobis(triphenylphosphine)nickel

Cited by 7 publications

References 0 publications

Activation of alkynols on transition metal carbonyl clusters. Reactions of 1-ethynylcyclohexanol with Fe3(CO)12 and Co2(CO)8. Crystal structures of Co3(CO)9[μ3-CCH2(C6H10OH)], Fe3(CO)9(μ-CO)[μ3-η2-CC(C6H10)] and Co2Fe(CO)6(μ-CO)[μ3-η7-(C6H9)CC(H)C(H)C(H)(C6H10)]

Activation of alkynols on transition metal carbonyl clusters. Reactions of 1-ethynylcyclohexanol with Fe3(CO)12 and Co2(CO)8. Crystal structures of Co3(CO)9[μ3-CCH2(C6H10OH)], Fe3(CO)9(μ-CO)[μ3-η2-CC(C6H10)] and Co2Fe(CO)6(μ-CO)[μ3-η7-(C6H9)CC(H)C(H)C(H)(C6H10)]

ChemInform Abstract: X‐RAY STRUCTURE OF A NOVEL PRODUCT FORMED FROM 2,5‐DIMETHYLHEX‐3‐YNE‐2,5‐DIOL BY CATALYTIC ACTION OF DIBROMOBIS(TRIPHENYLPHOSPHINE)NICKEL

Rhodium and platinum complexes as catalysts for the polymerization of phenylacetylene

Contact Info

Product

Resources

About