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Zur Elektronenstruktur metallorganischer Komplexe der f‐Elemente. 64 Äußert sich die zwitterionische Natur des Triphenylphosphanoxid‐Liganden auch in seinen spektrochemischen Eigenschaften?
Author(s) -
Amberger HannsDieter,
Zhang Lixin,
Reddmann Hauke,
Apostolidis Christos,
Walter Olaf
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200600220
Subject(s) - chemistry , adduct , triphenylphosphine oxide , triphenylphosphine , moiety , lanthanide , cyclopentadienyl complex , oxide , ligand (biochemistry) , stereochemistry , crystallography , medicinal chemistry , ion , organic chemistry , catalysis , biochemistry , receptor
Electronic Structures of Organometallic Compounds of f Elements. 64 Does the Zwitterionic Nature of the Triphenylphosphine Oxide Ligand Manifest itself in its Spectrochemical Properties? The triphenylphosphine oxide mono adducts of the moiety tris(η 5 ‐cyclopentadienyl)lanthanide(III) (Ln(Cp) 3 ; Ln = Pr ( 1 ), La ( 2 )) were synthesized and structurally characterized. The Ln–O distances of these compounds are noticeably shorter than those of the corresponding THF adducts. A crystal field (CF) analysis of the optical spectra of 1 leads to a low absolute value of the quadratic CF parameter which is comparable with those of [Pr(Cp) 3 (L)] − adducts with anionic bases but not with [Pr(Cp) 3 (MeTHF)]. Reasons for the latter finding are presented.