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Can. J. Chem. 68, 1564 (1990).The mechanism of the reaction of dicarbonyl(rls-cyclopentadienyl)phenyliron, 1, with diphenylacetylene to give 2,3-diphenyl-[lH]-inden-1-one has been investigated using a partially deuterated 1. The mechanistic pathway of the reaction is discussed in terms of the labelling of the indenones obtained. The reaction of phenylacetylene with 1 gives a mixture of products including 2,4,6-triphenyl-4'-methylbenzophenone and C-4,C-6a-dihydro-4-(4'-methylphenyl)-2-phenylpentalene(l-r-3aH)one.Key words: indenones, acetylenes, iron, carbonyl.IAN R. BUTLER, JOANNE L. ELLIOT et JEAN HOUDE, JR. Can. J. Chem. 68, 1564 (1990).Utilisant un composk 1 partiellement deutCrt, on a examink le mCcanisme de la reaction du dicarbonyl(r15-cyclopentadiknyl)phCnylfer, 1, avec le diphknylacktylkne qui conduit la 2,3-diphknyl-[1H]-indkn-1-one. On discute des diverses voies mkcanistiques de la rkaction en fonction de la position des marqueurs dans les indenones obtenues. La rkaction du phknylacCtylkne avec le composk 1 conduit i un mklange de produits incluant la 2,4,6-triphknyl-4'-mCthylbenzophCnone et la C-4,C-6a-dihydro-4-(4'-mkthylphknyl)-2-phknylpentalene(l-r-3aH)one.

Thermal and Photochemical Reactions of η5-Cyclopentadienyl( naphthoyl)(dicarbonyl)iron Complexes with Alkynes: Formation of Benzindenones and Dihydropentalenones.-2-Naphthoylchloride shows a similar reactive behavior as the 1-isomer ( II), the analogous product to (V) being (VII). Both (VI) and (VII) have space group P21/n, Z = 4. -(BUTLER, I. R.; CHARLAND, J.-P.; ELLIOT, J. L.; HOUDE, J. JUN.; LINDSELL, W. E.; MCCULLOUGH, K. J.; PRESTON, P. N.; RETTIE, A.

reactions of organo-metal compounds reactions of organo-metal compounds O 0350 -134A Deuterium Labeling Study into the Insertion of Diphenylacetylenes into Iron-Aryl Bonds. -The mechanism of the reaction of the complexes (I) with diphenylacetylene (II) to give the indenones (III) is investigated using partially deuterated derivatives of (I). -(BUTLER, I. R.; ELLIOT, J. L.; HOUDE, J. JUN.; Can.