139142-47-5Relevant academic research and scientific papers
Ring Opening versus Phenyl-Phosphorous Bond Clevage in incorporating a Phosphole into Triosmium Clusters
Deeming, Antony J.,Powell, Nicholas I.,Arce, Alejandro J.,Sanctis, Ysaura De,Manzur, Jorge
, p. 3381 - 3386 (1991)
The five-membered heterocyclic compound 3,4-dimethyl-1-phenylphosphole (PhPCH=CMeCMe=CH) reacts with or to give the simple substitution products 12-x(PhPC4H2Me2)x> (x = 1 or 2) in which the phospholes are co-ordinated as tertiary phosphines through the phosphorous atoms.Thermolysis of these compounds gives decarboxylation compounds containing modified phosphole ligands.Phosphorous-carbon bonds either to the phenyl group or within the five-membered ring have been cleaved.The X-ray structure of the main product 1 shows that the organic μ3 ligand is a six-electron donor which is co-ordinated differently from the corresponding eight-electron donating ligand derived from 1-phenylphosphole in the cluster .There is evidence for the reversible generation of this alternative form, 3, of the methylated compound 1 by photolysis.A minor product of the thermolysis is the hydrido cluster CH=CMeCMe=CH)(μ3-C6H4)(CO)9> 2 which contains a five-membered phospholyl ring and an o-phenylene (benzyne) ligand which originated from the phenyl group.The X-ray structure shows that the phospholyl ligand bridges two osmium atoms as a phosphido ligand through the phosphorous atom.The major and minor products, 1 and 2, are both derived by C-P bond cleavage, either in the phosphole ring or to the phenyl substituent respectively.
