摘要:

The coordination chemistry of cyclopentadienyl ligands that contain an additional coordination site appended to the ring-periphery by a covalent bridge Z, C5R4−Z-X or C5R4−Z-L, is outlined. When transition metals are coordinated both to the cyclopentadienyl group C5R4and the pendent donor site X or L (X = CH2NR′, O; L = HC˭CH2NR2′, PR2′, OR′, SR′), the resulting complexes possess distinct properties due to the chelate effect. In such complexes the coordination sphere is defined by the nature of the bridge Z and the coordinating groups X and L and a series of metallacyclic complexes becomes available of which the chemistry is different from that of their non-bridged analogs.

ISSN:0260-3594    

DOI:10.1080/02603599408035859

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Many features of the structural, magnetochemical, spectral, electrochemical, and chemical behavior of transition metal complexes with redox-active dioxolene ligands indicate that most of them are valence-localized species with well defined and experimentally distinguishable metal- and dioxolene-oxidation states. The valence localization results mainly from large structural differences between individual oxidation states of the dioxolene ligands. It is shown that dioxolene complexes may be treated like weakly coupled mixed-valence compounds, and a qualitative “localized-valence” model is developed in order to interpret physical and chemical properties of dioxolene complexes, including their bistability, in a unifying way.

ISSN:0260-3594    

DOI:10.1080/02603599408035860

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

If the activation entropies ΔS*) for a series of thermal or Hg2+−assisted chloride release aquation rates from chloroam(m)ine complexes are ranked, orders for the effect of the non-replaced ligands are obtained. These orders are within reasonable expectation for the extent of interchange that takes place as the reaction proceeds.

ISSN:0260-3594    

DOI:10.1080/02603599408035861

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0260-3594    

DOI:10.1080/02603599408035858

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor