- Variation of electronic transitions and reduction potentials of cerium(IV) complexes.
Variation of electronic transitions and reduction potentials of cerium(IV) complexes.
Dalton transactions (Cambridge, England : 2003) (2014-08-26)
Ursula J Williams, David Schneider, Walter L Dorfner, Cäcilia Maichle-Mössmer, Patrick J Carroll, Reiner Anwander, Eric J Schelter
PMID25148646
ABSTRACT
The trivalent compound K[Ce[N(SiHMe2)2]4] was synthesized and oxidized, providing a convenient route to the reported cerium(IV) compound Ce[N(SiHMe2)2]4. Protonolysis reactions of Ce[N(SiHMe2)2]4 with tert-butanol, substituted benzyl alcohols, and 2,6-diphenylphenol yielded the neutral tetravalent compounds Ce(O(t)Bu)4(py)2, Ce2(OCH2C6R5)8(thf)2 (R = Me, F), and Ce(Odpp)4 (dpp = 2,6-(C6H5)2-C6H3). Spectroscopic and electrochemical characterization of the monometallic cerium(IV) silylamide, alkoxide, and aryloxide compounds revealed variable ligand-to-metal charge transfer transitions and metal-based reduction potentials. Computational bonding analyses were performed to complement the physical characterization of the complexes.
MATERIALS
Product Number
Brand
Product Description
Sigma-Aldrich
Diethyl ether, reagent grade, ≥98%, contains ≤2% ethanol and ≤10ppm BHT as inhibitor
Sigma-Aldrich
Diethyl ether, puriss., contains ~5 mg/L 2,6-di-tert.-butyl-4-methylphenol as stabilizer, meets analytical specification of Ph. Eur., BP, ≥99.5% (GC)
Sigma-Aldrich
Diethyl ether, contains BHT as inhibitor, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.8% (GC)
Sigma-Aldrich
Diethyl ether, ACS reagent, ≥98.0%, contains ≤2% ethanol and ≤10ppm BHT as inhibitor
Sigma-Aldrich
Dichloromethane, suitable for HPLC, ≥99.9%, contains 40-150 ppm amylene as stabilizer