Metallorganische verbindungen der lanthanoide

Schumann, Herbert; Albrecht, Ilse; Pickardt, Joachim; Hahn, Ekkehardt

doi:10.1016/0022-328x(84)80611-7

Cited by 45 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overall, the LnN(pz) (pz=pyrazolyl) bond lengths in 3 (2.347(2)–2.506(2) Å) and 4 (2.343(2)–2.531(2) Å) are slightly longer than in the respective precursor 2 c (2.339(2)–2.483(2) Å); this is attributable to the increased steric bulk of the amido ligands and nicely shows that the ancillary ligand easily adapts to the given steric requirements. The LnC(Me) distances ( 3 : 2.362(3) Å; 4 : 2.371(2) Å) compare well with those of 2 c 11e (2.364(3)/2.375(2) Å), but are significantly shorter than those in dimeric [(Cp*) 2 Lu(μ‐Me)Lu(Me)(Cp*) 2 ]15 (2.423(3) Å; Cp*=C 5 Me 5 − ) and in ate complex [(Cp*)LuMe 3 ][Li(tmeda) 2 ]16 (av. 2.513 Å).…”

Section: Resultsmentioning

confidence: 93%

Rare‐Earth‐Metal Methyl, Amide, and Imide Complexes Supported by a Superbulky Scorpionate Ligand

Schädle

Maichle‐Mößmer

Schädle

et al. 2014

Chemistry A European J

View full text Add to dashboard Cite

The reaction of monomeric [(Tp(tBu,Me) )LuMe2 ] (Tp(tBu,Me) =tris(3-Me-5-tBu-pyrazolyl)borate) with primary aliphatic amines H2 NR (R=tBu, Ad=adamantyl) led to lutetium methyl primary amide complexes [(Tp(tBu,Me) )LuMe(NHR)], the solid-state structures of which were determined by XRD analyses. The mixed methyl/tetramethylaluminate compounds [(Tp(tBu,Me) )LnMe({μ2 -Me}AlMe3 )] (Ln=Y, Ho) reacted selectively and in high yield with H2 NR, according to methane elimination, to afford heterobimetallic complexes: [(Tp(tBu,Me) )Ln({μ2 -Me}AlMe2 )(μ2 -NR)] (Ln=Y, Ho). X-ray structure analyses revealed that the monomeric alkylaluminum-supported imide complexes were isostructural, featuring bridging methyl and imido ligands. Deeper insight into the fluxional behavior in solution was gained by (1) H and (13) C NMR spectroscopic studies at variable temperatures and (1) H-(89) Y HSQC NMR spectroscopy. Treatment of [(Tp(tBu,Me) )LnMe(AlMe4 )] with H2 NtBu gave dimethyl compounds [(Tp(tBu,Me) )LnMe2 ] as minor side products for the mid-sized metals yttrium and holmium and in high yield for the smaller lutetium. Preparative-scale amounts of complexes [(Tp(tBu,Me) )LnMe2 ] (Ln=Y, Ho, Lu) were made accessible through aluminate cleavage of [(Tp(tBu,Me) )LnMe(AlMe4 )] with N,N,N',N'-tetramethylethylenediamine (tmeda). The solid-state structures of [(Tp(tBu,Me) )HoMe(AlMe4 )] and [(Tp(tBu,Me) )HoMe2 ] were analyzed by XRD.

show abstract

Section: Resultsmentioning

confidence: 93%

Rare‐Earth‐Metal Methyl, Amide, and Imide Complexes Supported by a Superbulky Scorpionate Ligand

Schädle

Maichle‐Mößmer

Schädle

et al. 2014

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…In this case, there is no evidence for the formation of the bis-anilido or bis-ring species, (Cp 000 )La(NHAr) 2 or (Cp 000 ) 2 La(NHAr). This synthetic method also circumvents the formation of salt or ''ate'' complexes, which is a pervasive problem in f-element chemistry [24][25][26][27][28][29][30][31][32][33][34]. The formulation of 3 with two molecules of coordinated THF was based on the X-ray crystal structure determination (see later); 1 H NMR spectroscopy was consistent with less than two molecules per metal center.…”

Section: Resultsmentioning

confidence: 99%

Mono-cyclopentadienyl complexes of lanthanum: synthesis and characterization of anilido derivatives

Giesbrecht

Collis

Gordon

et al. 2004

Journal of Organometallic Chemistry

View full text Add to dashboard Cite

“…1b) is not common. A few precedent structures of this type have been reported in the lanthanides series [18][19][20][21][22]. The Sm-B distances in the cation (2.59(6) and 2.61(3) Å ) and in the anion (2.58(6) and 2.58(2) Å ) of 1, as well as IR data, are compatible with a tridentate Sm-ðg 3 -HÞ 3 B-H mode of bonding, likely distorted however, as already observed [23,24].…”

mentioning

confidence: 97%

Structural diversity in the borohydrido lanthanides series: First isolation and X-ray crystal structure of ionic

Bonnet

Visseaux

Hafid

et al. 2007

Inorganic Chemistry Communications

View full text Add to dashboard Cite

Structural diversity in the borohydrido lanthanides series:First isolation and X-ray crystal structure of ionic ½SmðBH 4 Þ 2 ðTHFÞ 5 þ ½Cp Ã0 SmðBH 4 Þ 3 À AbstractThe reaction of SmðBH 4 Þ 3 ðTHFÞ 3 with a half equivalent of KCp Ã0 ðCp Ã0 ¼ C 5 Me n 4 Pr) affords a compound comprising one Cp Ã0 ligand and three THF molecules per two Sm atoms, ½Cp Ã0 Sm 2 ðBH 4 Þ 5 ðTHFÞ 3 , according to analytical data. Crystals of penta-THF adduct 1, showing the same 1 H NMR spectrum except for the quantity of THF, could be isolated from a solution of half-samarocene Cp Ã0 SmðBH 4 Þ 2 ðTHFÞ (2). X-ray structure determination of 1 revealed an ionic compound ½SmðBH 4 Þ 2 ðTHFÞ 5 þ ½Cp Ã0 SmðBH 4 Þ 3 À with two discrete mononuclear Sm polyhedrons. The expected neutral samarocene Cp Ã0 2 SmðBH 4 ÞðTHFÞ(3) could be obtained from the reaction of SmðBH 4 Þ 3 ðTHFÞ 3 with two equivalents of KCp Ã0 . X-ray structure analysis showed that 3 is a monomeric complex bearing a terminal borohydride ligand. All BH À 4 ligands in 1 and 3 exhibit an g 3 -H 3 BH bonding mode.

show abstract

Metallorganische verbindungen der lanthanoide

Cited by 45 publications

References 10 publications

Rare‐Earth‐Metal Methyl, Amide, and Imide Complexes Supported by a Superbulky Scorpionate Ligand

Rare‐Earth‐Metal Methyl, Amide, and Imide Complexes Supported by a Superbulky Scorpionate Ligand

Mono-cyclopentadienyl complexes of lanthanum: synthesis and characterization of anilido derivatives

Structural diversity in the borohydrido lanthanides series: First isolation and X-ray crystal structure of ionic

Contact Info

Product

Resources

About