The importance of interligand interactions to structure and reactivity of coordinatively unsaturated ruthenium and iron half-sandwich complexes - Application of the TSC concept II

Valentin N. Sapunov, Roland Schmid, Karl Kirchner, Hideo Nagashima

Research output: Contribution to journalReview article

21 Citations (Scopus)

Abstract

The interaction between any fragments bonded to some central atom are increasingly recognized as an important factor in determining, e.g. the geometry and properties of metal complexes. Here we analyze the class of the two-legged piano stool complexes Cp′ML2 (Cp′= cyclopentadienyl or a derivative, M = Fe(II) and Ru(II), L = phosphorus and nitrogen co-ligands) with the aid of the through-space coupling (TSC) concept. This is the molecular orbital representation of van der Waals-like repulsive-attractive forces between the ligands in addition to the interactions with the metal center. The combination of both, i.e. the interaction between the new collective ligands orbitals and the metal AO's is shown to be the main determinant for deciding whether a planar or pyramidal structure is adopted and further, whether the complex is diamagnetic or paramagnetic. In addition the TSC concepts aids in understanding the effect of intercomplex interactions on the nucleophilic and electrophilic behavior of the 16e-complexes towards an incoming ligand. In fact, interpretations hitherto solely in terms of electronic ligand effects appear to be inadequate. The present paper is a continuation of our former work in which we successfully applied the TSC concept to rationalize the diverse array of structural arrangements as well as reactivities of the main-group Cp metal complexes (Sapunov et al. Coord. Chem. Reviews 214 (2001) 143).

Original languageEnglish
Pages (from-to)363-382
Number of pages20
JournalCoordination Chemistry Reviews
Volume238-239
DOIs
Publication statusPublished - Mar 1 2003

Fingerprint

Ruthenium
ruthenium
Iron
reactivity
Ligands
iron
ligands
Coordination Complexes
Metal complexes
metals
interactions
Metals
planar structures
Molecular orbitals
determinants
Phosphorus
phosphorus
molecular orbitals
Nitrogen
fragments

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

The importance of interligand interactions to structure and reactivity of coordinatively unsaturated ruthenium and iron half-sandwich complexes - Application of the TSC concept II. / Sapunov, Valentin N.; Schmid, Roland; Kirchner, Karl; Nagashima, Hideo.

In: Coordination Chemistry Reviews, Vol. 238-239, 01.03.2003, p. 363-382.

Research output: Contribution to journalReview article

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