The so-called indenyl effect also describes changes in hapticity in a substitution reaction.
2.
He lectured across the world on metal complexes of cyclopentadienyl, indenyl, arenes, olefins, and metal carbonyls.
3.
Metals studied with 2, 2'- bis ( 2-indenyl ) biphenyl include titanium, zirconium, and hafnium.
4.
Hydrogenation of the arene ring in the indenyl ligand resulted in CO substitution at about half the rate of the cyclopentadienyl compound.
5.
Veiros conducted a study comparing the rate of substitution on [ ( ? 5-X ) Mn ( CO ) 3 ] where X is cyclopentadienyl, indenyl, fluorenyl, cyclohexadienyl, and 1-hydronaphthalene.
6.
Mawby and Jones later studied the rate of CO substitution with P ( OEt ) 3 with Fe ( ? 5-C 9 H 7 ) ( CO ) 2 I and Fe ( ? 5-C 5 H 5 ) ( CO ) 2 I and found that both occur by an S N 1 pathway with the indenyl substitution occurring about 575 times faster.
7.
Subsequent work by Hart-Davis, Mawby, and White compared CO substitution by phosphines in Mo ( ? 5-C 9 H 7 ) ( CO ) 3 X and Mo ( ? 5-C 5 H 5 ) ( CO ) 3 X ( X = Cl, Br, I ) and found the cyclopentadienyl compounds to substitute by an S N 1 pathway and the indenyl compounds to substitute by both S N 1 and S N 2 pathways.
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