P4-Liganden mit maximaler Elektronendonorfähigkeit

Quantitative analysis of bonding in P4 clusters

“…The mechanism of this transformation agrees with the ESR results [12]. X-ray diffraction analysis of the complex ((Fe(CO) 4 (µ-P 2 )) 2 (µ-Fe 2 (CO) 6 ) 2 , formed in the reaction of white phosphorus with Fe 2 (CO) 9 in boiling benzene, has confirmed the existence of the planar P 4 fragment [13]. There is also some evidence of the formation of the tetraphosphorus anion [14].…”

Coordination Behavior of [Cp′′2Zr(η1:1‐P4)] towards Different Lewis Acids

“…[16] At this point, we becamei nterested in this compound to complete its characterization and to use it as aP 4 2À transfer reagent. Moreover,t he stability of the obtainedm etal carbonyl substituted complexes of [Cp'' 2 Zr(h 1:1 -P 4 )] is in contrast to the labilityo fw hite phosphorus in the presence of metal carbonyls, leading to transformed cyclo-P 4 (H) [19] and double P 2 (I) [20] containing complexes,r espectively. [18] Therefore,t he need arose to substitute the P 4 framework with Lewis acidic units to increaset he solubility of the products subsequentt ot he P 4 transfer.D uring these investigations,w ef ound an interesting dependence of the coordination modes on the electronic and steric properties of the Lewis acids.…”

Synthesis of Anionic Iron Polyphosphides by Reaction of White Phosphorus with “Cp*Fe−”

“…The single-crystal X-ray structure of K3 shows that the [(Cp*Fe) 3 Figure 3) is well-separated from the two crystallographically independent [K( [18]crown-6)(thf) 2 ]…”

“…[1,3,4] However, these reactions require thermal or photolytic activation and are not very selective. Anionic iron polyphosphides have not been described until very recently.…”

“…Furthermore, the structure contained a toluene solvate molecule that was severely disordered over a crystallographic inversion center. No satisfactory model for this disorder could be found, and the electron density associated with this solvate molecule was removed from the refinement using the program SQUEEZE (111 electrons/cell in a solvent accessible void of 374.8 3 …”