Thermally stable rare earth dialkyl complexes supported by a novel bis(phosphinimine)pyrrole ligand.

@article{Johnson2012ThermallySR,
  title={Thermally stable rare earth dialkyl complexes supported by a novel bis(phosphinimine)pyrrole ligand.},
  author={Kevin R. D. Johnson and Matt A Hannon and Jamie S Ritch and Paul G. Hayes},
  journal={Dalton transactions},
  year={2012},
  volume={41 26},
  pages={
          7873-5
        }
}
A novel bis(phosphinimine)pyrrole based ligand (HL) and its synthesis are reported. Rare earth dialkyl complexes of the ligand, LLn(CH(2)SiMe(3))(2) (Ln = Er, Lu, Sc), have been prepared and found to exhibit high thermal stability in solution. The protio-ligand and dialkyl lanthanide complexes (Ln = Er, Lu) have been characterised by single crystal X-ray diffraction studies. 
View on PubMed
rsc.org
34 Citations

34 Citations

Citation Type

Citation Type

Yttrium and scandium complexes of a bulky bis(phosphinimine)carbazole ligand
Yttrium-Alkyl Complexes Supported by a Ferrocene-Based Phosphinimine Ligand
The synthesis and characterization of two yttrium alkyl complexes supported by a bisphosphinimine ferrocene ligand, NPfc (1,1′-di(2,4-di-tert-butyl-6-diphenylphosphiniminophenoxy)ferrocene), were…
Ligand influence on intramolecular cyclometalation in bis(phosphinimine) rare earth alkyl complexes
The synthesis and reactivity of two new bis(phosphinimine)carbazole ligands (PippN=PMe2)2DMC (HLA, 3) and (PippN=P(C4H8))2DMC (HLB, 10), where Pipp = para-isopropylphenyl and DMC =…
Bis(pyrazolyl)carbazole as a Versatile Ligand for Supporting Lutetium Alkyl and Hydride Complexes
Two derivatives of a new bis(pyrazolyl)carbazole pincer ligand H(CzPzR), R = iPr and Me, and their syntheses are reported. Lutetium dialkyl complexes of the ligand (CzPzR)Lu(CH2SiMe3)2, R = iPr and…
Organolutetium-Mediated Dearomatization and Functionalization of Pyrimidine Rings
The synthesis of a pentadentate NNNNN bis(phosphinimine)carbazole pincer ligand bearing two pyrimidine N-aryl rings is reported. A dialkyl lutetium complex of the ligand, prepared by alkane…
Differences in the cyclometalation reactivity of bisphosphinimine-supported organo-rare earth complexes.
The pyrrole-based ligand N,N'-((1H-pyrrole-2,5-diyl)bis(diphenylphosphoranylylidene))bis(4-isopropylaniline) (HL(B)) can be deprotonated and coordinated to yttrium and samarium ions upon reaction…
A cascade reaction: ring-opening insertion of dioxaphospholane into lutetium alkyl bonds.
TLDR
The product of this reaction, generated by the ring-opening insertion of dioxaphospholane moieties into lutetium-carbon bonds, was characterized by multinuclear NMR spectroscopy and single crystal X-ray diffraction.
Bis(alkyl) rare-earth complexes supported by a new tridentate amidinate ligand with a pendant diphenylphosphine oxide group. Synthesis, structures and catalytic activity in isoprene polymerization.
TLDR
The amidinate ligand bearing a Ph2P(O)-group provides a high isoprene polymerization rate along with excellent control over regio- and stereoselectivities and allows us to obtain polyisoprenes with a reasonable molecular weight distribution.
Rare-Earth-Metal Complexes Bearing Phosphazene Ancillary Ligands: Structures and Catalysis toward Highly Trans-1,4-Selective (Co)Polymerizations of Conjugated Dienes
The bis-arylated phosphazene compounds [HN(PPh2NAr)2] (Ar = phenyl (HL1), 2,6-dimethylphenyl (HL2), 2,6-diisopropylphenyl (HL3)) and the imidodiphosphinate compound HN(PPh2O)2 (HL4) have been…
New types of Cu and Ag clusters supported by the pyrrole-based NNN-pincer type ligand
2,5-Bis(3,5-dimethylpyrazolylmethyl)pyrrole LH becomes the monoanionic NNN pincer ligand upon deprotonation of the pyrrolic NH proton. It not only gives typical pincer type complexes but also…
...
1
2
3
4
...

References

SHOWING 1-10 OF 30 REFERENCES
Synthesis and Reactivity of Dialkyl Lutetium Complexes Supported by a Novel Bis(phosphinimine)carbazole Pincer Ligand
The synthesis of a novel bis(phosphinimine) ancillary ligand based on a carbazole framework is described (HLPh, 4a; HLPipp, 4b; Ph = phenyl, Pipp = para-isopropylphenyl). Protonolysis with…
Rare-Earth Metal Bis(alkyl)s Supported by a Quinolinyl Anilido-Imine Ligand: Synthesis and Catalysis on Living Polymerization of ε-Caprolactone
The tridentate ligand N-(2-((2,6-diisopropylphenylimino)methyl)phenyl)quinolin-8-amine (HL) was prepared. Treatment of HL with 1 equiv of Ln(CH2SiMe3)3(THF)2 afforded the corresponding rare-earth…
Synthesis and thermal behavior of dimethyl scandium complexes featuring anilido-phosphinimine ancillary ligands
Non-cyclopentadienyl ancillaries in organogroup 3 metal chemistry: a fine balance in ligand design
Group 3 metal catalysts for ethylene and α-olefin polymerization
Four-coordinate erbium organometallic and coordination complexes: Synthesis and structure
Carbazole-bis(oxazolines) as Monoanionic, Tridentate Chelates in Lanthanide Chemistry: Synthesis and Structural Studies of Thermally Robust and Kinetically Stable Dialkyl and Dichloride Complexes.
The carbazole-bis(oxazoline) ligand 1,8-bis(4′,4′-dimethyloxazolin-2′-yl)-3,6-di-tert-butylcarbazole (H-Czx, 14) was prepared and reacted with Ln(CH2SiMe3)3(THF)2 to afford the five-coordinate…
Synthesis and structural chemistry of non-cyclopentadienyl organolanthanide complexes.
TLDR
96 Samarium diiodide acted as reducing agent in the reaction with (phenylenebis(3,5-tBu4-salicylidene)iminato)sodium, which resulted in formation of the THF adduct {P2N2}YCH2SiMe3(THF), whereas the THf-free compound could only be isolated as a highly reactive oily material.
Convenient synthetic equivalents of 2-lithiopyrrole and 2,5-dilithiopyrrole
Kinetic and Mechanistic Investigation of Metallacycle Ring Opening in an Ortho-Metalated Lutetium Aryl Complex
Reactivity involving metallacycle ring opening of ortho-metalated bis(phosphinimine)carbazolide complexes (LPh-κ3N,κ2CP-Ph)Lu(THF) (1a) and (LPipp-κ3N,κ2CP-Ph)Lu(THF) (1b); L = [1,8-(Ph2P═NAr)2dmc];…
...
1
2
3
...