Tris(triphenylcyclopentadienyl) lanthanide complexes – at the edge of steric overcrowding

Tris(triphenylcyclopentadienyl) lanthanide complexes – at the edge of steric overcrowding Full article

Journal

Inorganica Chimica Acta
ISSN: 1873-3255 , E-ISSN: 0020-1693

Output data

Year: 2026, Volume: 590, Article number : 122962, Pages count : DOI: 10.1016/j.ica.2025.122962

Authors

Bardonov Daniil A. ^1,2 , Degtyareva Svetlana S. ^1,2 , Lyssenko Konstantin A. ³ , Nifant'ev Ilya E. ^1,2 , Minyaev Mikhail E. ^1,4 , Roitershtein Dmitrii M. ^1,2

Affiliations

1	A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, 119991 Moscow, Russia
2	National Research University Higher School of Economics, 20 Miasnitskaya Str., 101000 Moscow, Russia
3	M.V. Lomonosov Moscow State University, Chemistry Department, 1 Leninskie Gory Str., Building 3, 119991 Moscow, Russia
4	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, 119991 Moscow, Russia

A series of tris(triphenylcyclopentadienyl) ate-complexes [CpPh33LnCl]−[MLn]+ (Ln = La, Ce, Pr) MLn = Li(THF)4 (Ln1), K(18-crown-6)(THF) (Ln2), Na(THF)6 (La3) were synthesized by the straightforward salt-metathesis method. All the structural types have been studied by single-crystal X-ray diffraction. The formation of complexes results from the concerted arrangement of the phenyl substituents of the three bulky triphenylcyclopentadienyl ligands respect to each other. Synthesis of tris(triphenylcyclopentadienyl) complexes of lanthanides with an ionic radius less than that of praseodymium could not be achieved. In conditions unfavorable for formation of the ate-complex, only La3, can be obtained, cerium reaction results in an inseparable mixture of compounds, while praseodymium yields the bis(cyclopentadienyl) complex [CpPh32PrCl(THF)] (Pr4).

Bardonov D.A. , Degtyareva S.S. , Lyssenko K.A. , Nifant'ev I.E. , Minyaev M.E. , Roitershtein D.M.
Tris(triphenylcyclopentadienyl) lanthanide complexes – at the edge of steric overcrowding
Inorganica Chimica Acta. 2026. V.590. 122962 . DOI: 10.1016/j.ica.2025.122962 Scopus OpenAlex

Submitted:	Jul 31, 2025
Published online:	Oct 31, 2025

≡ Scopus:	2-s2.0-105020261179
≡ OpenAlex:	W4415592266