Dimethylphosphanylethylcyclopentadienyl Complexes of Lanthanum and Yttrium

Karsch, Hans H.; Gräf, Volker; Reisky, Manfred; Witt, Eva

doi:10.1002/(sici)1099-0682(199810)1998:10<1404::aid-ejic1403>3.0.co;2-3

Cited by 8 publications

(5 citation statements)

References 37 publications

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“…Neutral phosphino groups coordinated to Sc or Y are present in complexes containing anionic PNP ligands, including {N(SiMe 2 CH 2 P i Pr 2 ) 2 } − , {pyrrole-2,5-(CH 2 PCy 2 ) 2 } − , and {bis(2-diisopropylphosphino-4-tolyl)amide} − as well as related P 2 N 2 -donor dianionic macrocycles, and in complexes bearing pendant phosphino groups on a Cp – ring . In these cases the anionic N or C centers significantly contribute to the stability of the Sc/Y–P linkage.…”

Section: Introductionmentioning

confidence: 99%

Rare Neutral Diphosphine Complexes of Scandium(III) and Yttrium(III) Halides

et al. 2016

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Reaction of MePCHCHPMe or o-CH(PMe) (L-L) with a suspension of ScI or YI in MeCN solution under rigorously anhydrous and oxygen-free conditions produced the highly unusual complexes [ScI(L-L)], [YI(MePCHCHPMe)], and [YI{o-CH(PMe)}MeCN]. X-ray crystal structures reveal that the scandium complexes adopt seven-coordinate, pentagonal-bipyramidal geometries with chelating diphosphines, while the eight-coordinate [YI{o-CH(PMe)}MeCN] is dodecahedral. The complexes were characterized by microanalysis and IR and multinuclear NMR spectroscopy. Solid-state NMR data (Sc, Y,P) and variable-temperature solution NMR data (H, P{H}, Sc) are presented and compared, leading to the conclusion that the same species are present in both the solid state and CHCl solution. Attempts to prepare complexes with other scandium halides and with aryl diphosphines and o-CH(AsMe) are briefly described.

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Section: Introductionmentioning

confidence: 99%

Rare Neutral Diphosphine Complexes of Scandium(III) and Yttrium(III) Halides

et al. 2016

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“…The silanes 3a and 3b, in their turn, were synthesized from alkali metal salts 2a [2,11], 2b-Li or 2b-Na (prepared analogously to its Ph 2 P-counterpart [12]) (see Scheme 1). Noteworthy, application of silanes 3a and 3b allows to completely avoid formation of the corresponding sandwich complexes and facilitates the synthetic procedure, especially in part concerning isolation of the target half-sandwiches.…”

Section: Resultsmentioning

confidence: 99%

“…Trimethylchlorosilane (Fluka) was refluxed with and distilled from aluminium powder (high vacuum line). [g 5 -C 5 (CH 3 ) 5 ]-ZrCl 3 [22,23], solutions of Me 2 PLi and Me 2 PNa in THF [24], 4,5,6,7-tetramethylspiro [2,4]heptadiene-4,6 [12], and lithium salt 2a [2,11] were prepared accordingly to the reported procedures. 1 H, 13 …”

Section: General Remarksmentioning

confidence: 99%

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Mono- and bis-[2-(P,P-dimethylphosphanyl)ethyl]tetramethylcyclopentadienyl zirconium(IV) complexes: Synthesis and structural studies in crystalline state and in solutions

Krut’ko

Borzov

Veksler

et al. 2005

Journal of Organometallic Chemistry

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“…13 A strategy for expanding this landscape is the use of bifunctional phosphines that may overcome unfavorable bonding properties by forcing the REE-P interaction via the use of a tether, a route that showed much promise in the nascent eld. [14][15][16][17][18] Continued development of new phosphorous-containing ligand systems featuring both neutral donor-to-metal (L-type) and anionic donor-to-metal (X-type) interactions deliver unconventional entryways into f-element-phosphorus coordination and provide insight into the nuances of these uncommon interactions.…”

Section: Introductionmentioning

confidence: 99%